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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 |
| 383 |
windowHandle = (HWND) wParam; |
| 384 |
itoa((int) windowHandle, strWindowId, 10); |
| 385 |
|
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//get name |
| 387 |
GetWindowText(windowHandle, windowTitle, 150); |
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|
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////setup return string |
| 390 |
strcat(result, "MSG=HSHELL_WINDOWDESTROYED;"); |
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strcat(result, "ID="); |
| 392 |
strcat(result, strWindowId); |
| 393 |
strcat(result, ";"); |
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strcat(result, "TITLE="); |
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strcat(result, windowTitle); |
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strcat(result, ";"); |
| 397 |
|
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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) { |
| 406 |
WriteToChannel(buffer); |
| 407 |
} |
| 408 |
} |
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|
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return CallNextHookEx(hhook, nCode, wParam, lParam); |
| 411 |
} |
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|
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DLL_EXPORT void SetCbtHook(void) |
| 414 |
{ |
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if (!bHooked) { |
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hhook = |
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SetWindowsHookEx(WH_CBT, (HOOKPROC) CbtProc, hInst, (DWORD) NULL); |
| 418 |
bHooked = true; |
| 419 |
} |
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|
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if (!bHooked2) { |
| 422 |
hhook2 = |
| 423 |
SetWindowsHookEx(WH_SHELL, (HOOKPROC) ShellProc, hInst, |
| 424 |
(DWORD) NULL); |
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bHooked2 = true; |
| 426 |
} |
| 427 |
|
| 428 |
if (!bHooked3) { |
| 429 |
hhook3 = |
| 430 |
SetWindowsHookEx(WH_CALLWNDPROC, (HOOKPROC) CallWndProc, hInst, |
| 431 |
(DWORD) NULL); |
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bHooked3 = true; |
| 433 |
} |
| 434 |
} |
| 435 |
|
| 436 |
DLL_EXPORT void RemoveCbtHook(void) |
| 437 |
{ |
| 438 |
if (bHooked) { |
| 439 |
UnhookWindowsHookEx(hhook); |
| 440 |
bHooked = false; |
| 441 |
} |
| 442 |
|
| 443 |
if (bHooked2) { |
| 444 |
UnhookWindowsHookEx(hhook2); |
| 445 |
bHooked2 = false; |
| 446 |
} |
| 447 |
|
| 448 |
if (bHooked3) { |
| 449 |
UnhookWindowsHookEx(hhook3); |
| 450 |
bHooked3 = false; |
| 451 |
} |
| 452 |
} |
| 453 |
|
| 454 |
DLL_EXPORT int GetInstanceCount() |
| 455 |
{ |
| 456 |
return iInstanceCount; |
| 457 |
} |
| 458 |
|
| 459 |
int OpenVirtualChannel() |
| 460 |
{ |
| 461 |
m_vcHandle = |
| 462 |
WTSVirtualChannelOpen(WTS_CURRENT_SERVER_HANDLE, WTS_CURRENT_SESSION, |
| 463 |
CHANNELNAME); |
| 464 |
|
| 465 |
if (m_vcHandle == NULL) { |
| 466 |
return 0; |
| 467 |
} |
| 468 |
else { |
| 469 |
return 1; |
| 470 |
} |
| 471 |
} |
| 472 |
|
| 473 |
int CloseVirtualChannel() |
| 474 |
{ |
| 475 |
BOOL result = WTSVirtualChannelClose(m_vcHandle); |
| 476 |
|
| 477 |
m_vcHandle = NULL; |
| 478 |
|
| 479 |
if (result) { |
| 480 |
return 1; |
| 481 |
} |
| 482 |
else { |
| 483 |
return 0; |
| 484 |
} |
| 485 |
} |
| 486 |
|
| 487 |
int ChannelIsOpen() |
| 488 |
{ |
| 489 |
if (m_vcHandle == NULL) { |
| 490 |
return 0; |
| 491 |
} |
| 492 |
else { |
| 493 |
return 1; |
| 494 |
} |
| 495 |
} |
| 496 |
|
| 497 |
int WriteToChannel(PCHAR buffer) |
| 498 |
{ |
| 499 |
PULONG bytesRead = 0; |
| 500 |
PULONG pBytesWritten = 0; |
| 501 |
|
| 502 |
BOOL result = |
| 503 |
WTSVirtualChannelWrite(m_vcHandle, buffer, (ULONG) strlen(buffer), |
| 504 |
pBytesWritten); |
| 505 |
|
| 506 |
if (result) { |
| 507 |
return 1; |
| 508 |
} |
| 509 |
else { |
| 510 |
return 0; |
| 511 |
} |
| 512 |
} |
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