#define SM_CXSCREEN 0 && Screen Width #define SM_CYSCREEN 1 && Screen Height #define SM_CXFULLSCREEN 16 && Widht (Client area) #define SM_CYFULLSCREEN 17 && Height (Client area) DECLARE INTEGER GetSystemMetrics IN Win32API; INTEGER nIndex ? GetSystemMetrics(SM_CXSCREEN) ? GetSystemMetrics(SM_CYSCREEN) ? GetSystemMetrics(SM_CXFULLSCREEN) ? GetSystemMetrics(SM_CYFULLSCREEN)