#include
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
SendMessage(FindWindow(0,0),WM_SYSCOMMAND,SC_MONITORPOWER,2);//關閉
::Sleep(10000);
SendMessage(FindWindow(0,0),WM_SYSCOMMAND,SC_MONITORPOWER,-1);//打開

return 0;
}