hWnd = CreateWindow(CLASS_NAME_SETUP, CLASS_NAME_SETUP, WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_MAXIMIZE, 0, 0, dwScreenX, dwScreenY, NULL, NULL, hInstance, NULL);  if(!hWnd) return(FALSE);  hWndMain = hWnd;
hWndMain = NULL;
BOOL InitInstance(HINSTANCE hInstance, DWORD dwCmdShow){  HWND  hWnd;  dwScreenX = GetSystemMetrics(SM_CXSCREEN);  dwScreenY = GetSystemMetrics(SM_CYSCREEN);  hInst = hInstance;  hWnd = CreateWindow(CLASS_NAME_SETUP,                      CLASS_NAME_SETUP,                      WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_MAXIMIZE,                      0,                      0,                      dwScreenX,                      dwScreenY,                      NULL,                      NULL,                      hInstance,                      NULL);  if(!hWnd)    return(FALSE);  hWndMain = hWnd;  return(TRUE);}