internal Tuple<double, double> GetBorderWidthAndCaptionHeight()
{
var metrics = new NonClientMetrics();
metrics.cbSize = Marshal.SizeOf(metrics);
NativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, metrics.cbSize, ref metrics, 0);
// [real border size] = 3 + scaling * borderWidth + scaling * paddedBorderWidth
// * This function return a value scaled by scaling.
var scaling = this.systemDpi.IsZero ? 1.0 : this.systemDpi.ScaleX;
return Tuple.Create(
(3.0 + (double)metrics.iBorderWidth + (double)metrics.iPaddedBorderWidth) / scaling,
(double)metrics.iCaptionHeight / scaling);
}
public static extern int SystemParametersInfo(int uAction, int uParam, ref NonClientMetrics lpvParam, int fuWinIni);
