Retrieves the specified system metric or system configuration setting.

GetSystemMetrics.cpp

#include <iostream>
#include <windows.h>
using namespace std;
int main()
  {
  int screenWidth = GetSystemMetrics(SM_CXSCREEN);
  int screenHeight = GetSystemMetrics(SM_CYSCREEN);
  int screenMonitors = GetSystemMetrics(SM_CMONITORS);

  cout<<"Screen width = "<<screenWidth<<" px"<<endl;
  cout<<"Screen height = "<<screenHeight<<" px"<<endl;
  cout<<"Screen Monitors = "<<screenMonitors<<""<<endl;
    system("PAUSE");
    return 0;
  }