ScreenOff

#include <windows.h>

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
	// Eliminate user's interaction for 500 ms
	//Sleep (500);

	// Turn off monitor
	SendMessage (HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, (LPARAM)2);

	// Turn on monitor
	//	SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, (LPARAM) -1);

	// Low power monitor
	//	SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, (LPARAM) 1);

	return 0;
}

//Weird thing is  the program keeps running in the background even without loop , aha . 


//Don't use main() , or the linker will complain !  
//Like this 
//1>MSVCRT.lib(exe_winmain.obj) : error LNK2001: unresolved external symbol _WinMain@16
//1>c:\users\ff-ssd\documents\visual studio 2015\Projects\ScreenOff\Release\ScreenOff.exe : fatal error LNK1120: 1 unresolved externals