/// <summary>
/// システムから画面の DPI 設定を取得します。
/// </summary>
/// <param name="orientation">画面の方向</param>
/// <returns></returns>
public static Int32 GetDpi(Orientation orientation)
{
Int32 capIndex = (orientation == Orientation.Horizontal) ? 0x58 : 90;
using (DCSafeHandle handle = UnsafeNativeMethods.CreateDC("DISPLAY"))
{
return(handle.IsInvalid ? 0x60 : UnsafeNativeMethods.GetDeviceCaps(handle, capIndex));
}
}
public static extern Int32 GetDeviceCaps(DCSafeHandle hDC, Int32 nIndex);