PowerToys/src/common/dpi_aware.h

#pragma once
#include "windef.h"

namespace DPIAware {
  constexpr inline int DEFAULT_DPI = 96;

  HRESULT GetScreenDPIForWindow(HWND hwnd, UINT & dpi_x, UINT & dpi_y);
  HRESULT GetScreenDPIForPoint(POINT p, UINT& dpi_x, UINT& dpi_y);
  void Convert(HMONITOR monitor_handle, int &width, int &height);
  void EnableDPIAwarenessForThisProcess();
  
  enum class AWARENESS_LEVEL
  {
      UNAWARE,
      SYSTEM_AWARE,
      PER_MONITOR_AWARE,
      PER_MONITOR_AWARE_V2,
      UNAWARE_GDISCALED
  };
  AWARENESS_LEVEL GetAwarenessLevel(DPI_AWARENESS_CONTEXT system_returned_value);
};