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//********************************************************************************* |
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// |
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//Title: Terminal Services Window Clipper |
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// |
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//Author: Martin Wickett |
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// |
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//Date: 2004 |
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// |
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//********************************************************************************* |
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|
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#include "hookdll.h" |
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#include <windows.h> |
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#include <winuser.h> |
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|
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#include "wtsapi32.h" |
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#include "Cchannel.h" |
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|
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#define DLL_EXPORT extern "C" __declspec(dllexport) |
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|
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// Shared DATA |
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#pragma data_seg ( "SHAREDDATA" ) |
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|
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// this is the total number of processes this dll is currently attached to |
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int iInstanceCount = 0; |
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HWND hWnd = 0; |
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|
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#pragma data_seg () |
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|
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#pragma comment(linker, "/section:SHAREDDATA,rws") |
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|
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bool bHooked = false; |
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bool bHooked2 = false; |
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bool bHooked3 = false; |
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HHOOK hhook = 0; //cbt |
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HHOOK hhook2 = 0; //shell |
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HHOOK hhook3 = 0; //wnd proc |
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HINSTANCE hInst = 0; |
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HANDLE m_vcHandle = 0; |
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|
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BOOL APIENTRY DllMain(HINSTANCE hinstDLL, DWORD ul_reason_for_call, |
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LPVOID lpReserved) |
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{ |
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switch (ul_reason_for_call) { |
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case DLL_PROCESS_ATTACH: |
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{ |
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// remember our instance handle |
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hInst = hinstDLL; |
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++iInstanceCount; |
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OpenVirtualChannel(); |
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break; |
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} |
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|
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case DLL_THREAD_ATTACH: |
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break; |
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case DLL_THREAD_DETACH: |
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break; |
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case DLL_PROCESS_DETACH: |
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{ |
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--iInstanceCount; |
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CloseVirtualChannel(); |
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} |
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break; |
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} |
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|
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return TRUE; |
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} |
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|
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LRESULT CALLBACK CallWndProc(int nCode, WPARAM wParam, LPARAM lParam) |
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{ |
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if (nCode < 0) { |
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return CallNextHookEx(hhook3, nCode, wParam, lParam); |
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} |
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|
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PCHAR buffer = NULL; |
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char windowTitle[150] = { "" }; |
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HWND windowHandle = NULL; |
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char result[255] = { "" }; |
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char strWindowId[25]; |
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char type[25]; |
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|
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LONG b, t, l, r; |
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char strB[5]; |
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char strT[5]; |
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char strL[5]; |
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char strR[5]; |
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RECT rect; |
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|
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CWPSTRUCT *details = (CWPSTRUCT *) lParam; |
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|
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switch (details->message) { |
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case WM_SIZING: |
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case WM_MOVING: |
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|
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windowHandle = details->hwnd; |
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//get win name |
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GetWindowText(windowHandle, windowTitle, 150); |
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|
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//get an id for it |
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itoa((int) windowHandle, strWindowId, 10); |
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|
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//get coords |
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GetWindowRect(windowHandle, &rect); |
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b = rect.bottom; |
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t = rect.top; |
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l = rect.left; |
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r = rect.right; |
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ltoa(b, strB, 10); |
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ltoa(t, strT, 10); |
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ltoa(r, strR, 10); |
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ltoa(l, strL, 10); |
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|
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////setup return string |
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strcat(result, "MSG=CALLWNDPROC_WM_MOVING;"); |
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strcat(result, "ID="); |
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strcat(result, strWindowId); |
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strcat(result, ";"); |
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strcat(result, "TITLE="); |
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strcat(result, windowTitle); |
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strcat(result, ";"); |
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strcat(result, "POS="); |
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strcat(result, strL); |
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strcat(result, "~"); |
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strcat(result, strT); |
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strcat(result, "~"); |
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strcat(result, strR); |
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strcat(result, "~"); |
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strcat(result, strB); |
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strcat(result, ";"); |
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|
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buffer = result; |
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|
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break; |
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|
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default: |
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break; |
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} |
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|
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if (ChannelIsOpen()) { |
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if (buffer != NULL) { |
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WriteToChannel(buffer); |
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} |
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} |
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|
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return CallNextHookEx(hhook3, nCode, wParam, lParam); |
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} |
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|
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LRESULT CALLBACK CbtProc(int nCode, WPARAM wParam, LPARAM lParam) |
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{ |
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if (nCode < 0) { |
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return CallNextHookEx(hhook, nCode, wParam, lParam); |
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} |
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|
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|
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PCHAR buffer = NULL; |
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|
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|
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char windowTitle[150] = { "" }; |
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HWND windowHandle = NULL; |
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char result[255] = { "" }; |
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char strWindowId[25]; |
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char type[25]; |
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|
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|
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LONG b, t, l, r; |
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char strB[5]; |
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char strT[5]; |
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char strL[5]; |
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char strR[5]; |
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RECT rect; |
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|
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int i = 0; //tmp |
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|
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switch (nCode) { |
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case HCBT_MINMAX: |
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|
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windowHandle = (HWND) wParam; |
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//get win name |
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GetWindowText(windowHandle, windowTitle, 150); |
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|
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//get an id for it |
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itoa((int) windowHandle, strWindowId, 10); |
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|
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//get operation type(min,max). if max, do not clip at all,if min use window's previous coords |
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//codes are: |
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|
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// SW_HIDE= 0 SW_SHOWNORMAL=1 SW_NORMAL=1 SW_SHOWMINIMIZED=2 SW_SHOWMAXIMIZED=3 SW_MAXIMIZE=3 |
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// SW_SHOWNOACTIVATE=4 SW_SHOW=5 SW_MINIMIZE=6 SW_SHOWMINNOACTIVE=7 SW_SHOWNA=8 SW_RESTORE=9 |
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// SW_SHOWDEFAULT=10 SW_FORCEMINIMIZE=11 SW_MAX=11 |
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|
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itoa((int) lParam, type, 10); |
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|
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//get coords |
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GetWindowRect(windowHandle, &rect); |
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b = rect.bottom; |
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t = rect.top; |
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l = rect.left; |
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r = rect.right; |
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ltoa(b, strB, 10); |
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ltoa(t, strT, 10); |
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ltoa(r, strR, 10); |
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ltoa(l, strL, 10); |
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|
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//get name |
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GetWindowText(windowHandle, windowTitle, 150); |
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|
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////setup return string |
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strcat(result, "MSG=HCBT_MINMAX;"); |
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strcat(result, "ID="); |
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strcat(result, strWindowId); |
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strcat(result, ";"); |
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strcat(result, "TITLE="); |
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strcat(result, windowTitle); |
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strcat(result, ";"); |
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strcat(result, "POS="); |
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strcat(result, strL); |
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strcat(result, "~"); |
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strcat(result, strT); |
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strcat(result, "~"); |
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strcat(result, strR); |
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strcat(result, "~"); |
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strcat(result, strB); |
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strcat(result, ";"); |
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strcat(result, "TYPE="); |
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strcat(result, type); |
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strcat(result, ";"); |
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|
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//------------------------------------------------------------------------------------------------- |
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// code to prevent minimising windows (can be removed once minimise has been implemented) |
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i = (int) lParam; |
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//if (i==0 || i==2 || i==6 || i==7 || i==8 || i==11) |
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if (i == 2 || i == 6) { |
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MessageBox(0, |
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"Minimising windows is not allowed in this version. Sorry!", |
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"TS Window Clipper", MB_OK); |
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return 1; |
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} |
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//----------------------------------------------------------------------------------------- |
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|
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//------------------------------------------------------------------------------------------------- |
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// code to prevent maximising windows (can be removed once maximise has been implemented) |
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i = (int) lParam; |
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//if (i==3 || i==9 || i==11) |
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if (i == 3 || i == 11) { |
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MessageBox(0, |
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"Maximising windows is not allowed in this version. Sorry!", |
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"TS Window Clipper", MB_OK); |
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return 1; |
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} |
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//----------------------------------------------------------------------------------------- |
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|
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buffer = result; |
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|
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break; |
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|
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case HCBT_MOVESIZE: |
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|
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windowHandle = (HWND) wParam; |
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//get win name |
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GetWindowText(windowHandle, windowTitle, 150); |
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|
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//get an id for it |
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itoa((int) windowHandle, strWindowId, 10); |
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|
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//get coords |
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GetWindowRect(windowHandle, &rect); |
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b = rect.bottom; |
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t = rect.top; |
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l = rect.left; |
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r = rect.right; |
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ltoa(b, strB, 10); |
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ltoa(t, strT, 10); |
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ltoa(r, strR, 10); |
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ltoa(l, strL, 10); |
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|
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//get name |
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GetWindowText(windowHandle, windowTitle, 150); |
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|
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////setup return string |
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strcat(result, "MSG=HCBT_MOVESIZE;"); |
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strcat(result, "ID="); |
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strcat(result, strWindowId); |
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strcat(result, ";"); |
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strcat(result, "TITLE="); |
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strcat(result, windowTitle); |
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strcat(result, ";"); |
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strcat(result, "POS="); |
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strcat(result, strL); |
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strcat(result, "~"); |
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strcat(result, strT); |
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strcat(result, "~"); |
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strcat(result, strR); |
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strcat(result, "~"); |
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strcat(result, strB); |
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strcat(result, ";"); |
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|
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buffer = result; |
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|
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break; |
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case HCBT_SETFOCUS: |
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//buffer = "HCBT_SETFOCUS"; |
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//not needed yet |
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break; |
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default: |
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break; |
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} |
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|
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if (ChannelIsOpen()) { |
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if (buffer != NULL) { |
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WriteToChannel(buffer); |
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} |
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} |
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|
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return CallNextHookEx(hhook, nCode, wParam, lParam); |
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} |
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|
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|
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LRESULT CALLBACK ShellProc(int nCode, WPARAM wParam, LPARAM lParam) |
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{ |
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if (nCode < 0) { |
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return CallNextHookEx(hhook, nCode, wParam, lParam); |
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} |
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|
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if (ChannelIsOpen()) { |
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PCHAR buffer = NULL; |
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|
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char windowTitle[150] = { "" }; |
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HWND windowHandle = NULL; |
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char result[255] = { "" }; |
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char strWindowId[25]; |
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LONG b, t, l, r; |
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char strB[5]; |
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char strT[5]; |
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char strL[5]; |
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char strR[5]; |
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RECT rect; |
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|
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switch (nCode) { |
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case HSHELL_WINDOWCREATED: |
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|
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//get window id |
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windowHandle = (HWND) wParam; |
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itoa((int) windowHandle, strWindowId, 10); |
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|
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//get coords |
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GetWindowRect(windowHandle, &rect); |
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b = rect.bottom; |
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t = rect.top; |
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l = rect.left; |
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r = rect.right; |
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ltoa(b, strB, 10); |
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ltoa(t, strT, 10); |
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ltoa(r, strR, 10); |
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ltoa(l, strL, 10); |
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|
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//get name |
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GetWindowText(windowHandle, windowTitle, 150); |
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|
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////setup return string |
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strcat(result, "MSG=HSHELL_WINDOWCREATED;"); |
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strcat(result, "ID="); |
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strcat(result, strWindowId); |
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strcat(result, ";"); |
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strcat(result, "TITLE="); |
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strcat(result, windowTitle); |
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strcat(result, ";"); |
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strcat(result, "POS="); |
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strcat(result, strL); |
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strcat(result, "~"); |
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strcat(result, strT); |
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strcat(result, "~"); |
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strcat(result, strR); |
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strcat(result, "~"); |
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strcat(result, strB); |
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strcat(result, ";"); |
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|
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buffer = result; |
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|
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break; |
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|
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case HSHELL_WINDOWDESTROYED: |
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|
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//get window id |
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windowHandle = (HWND) wParam; |
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itoa((int) windowHandle, strWindowId, 10); |
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|
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//get name |
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GetWindowText(windowHandle, windowTitle, 150); |
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|
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////setup return string |
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strcat(result, "MSG=HSHELL_WINDOWDESTROYED;"); |
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strcat(result, "ID="); |
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strcat(result, strWindowId); |
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strcat(result, ";"); |
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strcat(result, "TITLE="); |
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strcat(result, windowTitle); |
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strcat(result, ";"); |
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|
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buffer = result; |
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|
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break; |
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default: |
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break; |
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} |
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|
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if (buffer != NULL) { |
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WriteToChannel(buffer); |
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} |
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} |
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|
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return CallNextHookEx(hhook, nCode, wParam, lParam); |
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} |
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|
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DLL_EXPORT void SetCbtHook(void) |
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{ |
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if (!bHooked) { |
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hhook = |
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SetWindowsHookEx(WH_CBT, (HOOKPROC) CbtProc, hInst, (DWORD) NULL); |
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bHooked = true; |
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} |
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|
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if (!bHooked2) { |
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hhook2 = |
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SetWindowsHookEx(WH_SHELL, (HOOKPROC) ShellProc, hInst, |
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(DWORD) NULL); |
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bHooked2 = true; |
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} |
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|
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if (!bHooked3) { |
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hhook3 = |
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SetWindowsHookEx(WH_CALLWNDPROC, (HOOKPROC) CallWndProc, hInst, |
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(DWORD) NULL); |
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bHooked3 = true; |
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} |
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} |
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|
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DLL_EXPORT void RemoveCbtHook(void) |
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{ |
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if (bHooked) { |
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UnhookWindowsHookEx(hhook); |
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bHooked = false; |
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} |
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|
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if (bHooked2) { |
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UnhookWindowsHookEx(hhook2); |
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bHooked2 = false; |
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} |
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|
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if (bHooked3) { |
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UnhookWindowsHookEx(hhook3); |
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bHooked3 = false; |
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} |
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} |
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|
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DLL_EXPORT int GetInstanceCount() |
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{ |
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return iInstanceCount; |
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} |
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|
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int OpenVirtualChannel() |
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{ |
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m_vcHandle = |
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WTSVirtualChannelOpen(WTS_CURRENT_SERVER_HANDLE, WTS_CURRENT_SESSION, |
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CHANNELNAME); |
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|
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if (m_vcHandle == NULL) { |
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return 0; |
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} |
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else { |
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return 1; |
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} |
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} |
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|
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int CloseVirtualChannel() |
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{ |
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BOOL result = WTSVirtualChannelClose(m_vcHandle); |
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|
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m_vcHandle = NULL; |
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|
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if (result) { |
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return 1; |
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} |
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else { |
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return 0; |
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} |
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} |
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|
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int ChannelIsOpen() |
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{ |
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if (m_vcHandle == NULL) { |
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return 0; |
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} |
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else { |
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return 1; |
494 |
} |
495 |
} |
496 |
|
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int WriteToChannel(PCHAR buffer) |
498 |
{ |
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PULONG bytesRead = 0; |
500 |
PULONG pBytesWritten = 0; |
501 |
|
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BOOL result = |
503 |
WTSVirtualChannelWrite(m_vcHandle, buffer, (ULONG) strlen(buffer), |
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pBytesWritten); |
505 |
|
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if (result) { |
507 |
return 1; |
508 |
} |
509 |
else { |
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return 0; |
511 |
} |
512 |
} |