A>А ты проверь, как я .

A>case WM_USER + 0x100: MessageBepp (0); break;
A>

A>а потом зациклись в пустоте

A>for ( ; ; ); 
A>

A>Оно никогда не дойдет . И окно твое "висеть" будет. В прямом смысле слова.

A>while (Get(Peek)Message (...)); 
A>

while (Get(Peek)Message (...));

Sleep(INFINITE);

A>GetMessage — выгребает с возвращением только PostMessage. Kirill и Павел правы.

while (GetMessage(&msg, NULL, 0, 0));

KL>А если все равно не веришь — попробуй из GetMessage получить хотя бы одно

KL>синхронное сообщение, успехов...

GetWindowLong(hwnd, GWL_WINDOWPROC);

BOOL GetClassInfo( 
HINSTANCE hInstance, 
LPCTSTR lpClassName, 
LPWNDCLASS lpWndClass); 

int GetClassName(
  HWND hWnd,           
  LPTSTR lpClassName,  
  int nMaxCount        
);

while (GetMessage(&msg, NULL, 0, 0));

DWORD* GetWndPointer(HWND hwnd) // hwnd is the handle of any window in the system
{
    DWORD user32_si; //user32 shared info; gSharedInfo
    DWORD pWND;
    DWORD local_correction;
    
    // 0x58180 is the offset of gSharedInfo in "user32.dll"
    user32_si=(DWORD)GetModuleHandle("user32.dll")+0x58180;

    pWND=*(DWORD*)(user32_si+4);
    pWND+=LOWORD(hwnd)*12;
    pWND=*(DWORD*)pWND; // now pWND points to the real WND structure above 2 GB
    // and this is a writable memory if we were running in system mode (ring 0)
    // but in user mode (ring 3) we could't even read it
    // this is something like 0xA03xxxxx this is where I want to
    // write 
    /*
    local_correction=*((DWORD *)0x7ffde6e8);
    // [7ffde6e8] - the value that must be subtracted from the pointer above 2 GB
    // in order to get user-mode accessible pointer to the window structure 
    pWND-=local_correction;
    // the new pointer points to read only memory but it is mapped to the same physical address as the
    // pointer above 2 GB, that is before the correction is made
    */
    return (DWORD*)pWND;
}