{
MessageBox (NULL, TEXT ("This program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}
hwnd = CreateWindow (szAppName, // window class name
TEXT ("The Hello Program"), // window caption
WS_OVERLAPPEDWINDOW, // window style
CW_USEDEFAULT, // initial x position
CW_USEDEFAULT, // initial y position
CW_USEDEFAULT, // initial x size
CW_USEDEFAULT, // initial y size
NULL, // parent window handle
NULL, // window menu handle
hInstance, // program instance handle
NULL) ; // creation parameters
ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;
while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
}
int g_iClickNum;
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc ;
PAINTSTRUCT ps ;
RECT rect ;
switch (message)
{
case WM_CREATE:
g_iClickNum = 0;
return 0 ;
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;
GetClientRect (hwnd, &rect) ;
FillRect(hdc, &rect, CreateSolidBrush(GetBkColor(hdc))); //用当前背景色填充客户区
if(g_iClickNum==0)
{
SetTextColor(hdc, RGB(255,0,0));
DrawText (hdc, TEXT ("欢迎使用"), -1, &rect,
DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;
}
else
{
char c[100];
sprintf(c, "第%d次鼠标左键按下", g_iClickNum);
SetTextColor(hdc, RGB(0,0,255));
DrawText (hdc, c, -1, &rect,
DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;
}
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_LBUTTONDOWN:
g_iClickNum++;
RedrawWindow(hwnd, NULL, NULL, RDW_INVALIDATE);
return 0 ;
case WM_DESTROY:
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}