GetDesktopWindow() and Window Hooks

[Madhu_Rani]

I am capturing the screen by using GetDesktopWindow(). Now I want that when ever desktop (captured screen)changes/updates, I get the information, so that I would capture it again. I have heard the word " window hooks" but do not know how to apply it. please guide? The application is MFC based.

[Adam Roderick J]

use the SetWindowsHookEx with WH_GETMESSAGE will be helpful For more info refer. http://msdn.microsoft.com/en-us/library/ms644990(VS.85).aspx[^]

Величие не Бога может быть недооценена.

[Madhu_Rani]

LRESULT CALLBACK CBTProc(int nCode, WPARAM wParam, LPARAM lParam) { int x=12; if (nCode==HCBT_MINMAX) { AfxMessageBox(_T("Called")); } return 0; } CSDITESTView::CSDITESTView() { SetWindowsHookEx(WH_CBT,&CBTProc,NULL,0); } After reading the mentioned article, I wrote these lines, but it is not working? I am expecting that when I minimize the window , the associated call back function should be called.

[Madhu_Rani]

LRESULT CALLBACK CBTProc(int nCode, WPARAM wParam, LPARAM lParam) { int x=12; if (nCode==HCBT_MINMAX) { AfxMessageBox(_T("Called")); } return 0; } CSDITESTView::CSDITESTView() { SetWindowsHookEx(WH_CBT,&CBTProc,NULL,0); } After reading the mentioned article, I wrote these lines, but it is not working? I am expecting that when I minimize the window , the associated call back function should be called.