Win32 API multi-monitor display information

demo.cc

#include <windows.h>

#include <iostream>
#include <vector>

struct ScreenArray {
  std::vector<RECT> Monitors;
  
  static BOOL CALLBACK MonitorEnumProc(HMONITOR monitor, HDC hdc, LPRECT rect, LPARAM data) {
    MONITORINFOEX mi = {0};
    
    mi.cbSize = sizeof(MONITORINFOEX);
    GetMonitorInfo(monitor, &mi);
    
    if (mi.dwFlags == DISPLAY_DEVICE_MIRRORING_DRIVER) {
      std::cout << "Using mirroring driver for multi-screen." << std::endl;
    } else {
      auto p = reinterpret_cast<ScreenArray *>(data);
      p->Monitors.push_back(*rect);
    }
    return TRUE;
  }
  
  ScreenArray() {
    Monitors.empty();
    EnumDisplayMonitors(nullptr, nullptr, MonitorEnumProc, (LPARAM)this);
  }
};

Reference: https://stackoverflow.com/questions/26541484/enumdisplaymonitors-callback