private void UpdateThumbnail(Point location, Size size)
{
DWM_THUMBNAIL_PROPERTIES properties = new DWM_THUMBNAIL_PROPERTIES()
{
dwFlags = DWM_TNP.DWM_TNP_OPACITY | DWM_TNP.DWM_TNP_RECTDESTINATION | DWM_TNP.DWM_TNP_RECTSOURCE | DWM_TNP.DWM_TNP_SOURCECLIENTAREAONLY | DWM_TNP.DWM_TNP_VISIBLE,
fSourceClientAreaOnly = ClientAreaOnly,
fVisible = true,
opacity = (byte)(Byte.MaxValue * Opacity),
rcDestination = new RECT(location.X, location.Y, size.Width, size.Height),
rcSource = new RECT(DrawnRegion),
};
if (DesktopWindowManager.Update(thumbnail, ref properties))
{
OnThumbnailUpdated(this, EventArgs.Empty);
}
else
{
OnThumbnailUpdateFailed(this, EventArgs.Empty);
}
}
private void UpdateThubmnail()
{
if (thumbnail != IntPtr.Zero)
{
DWM_THUMBNAIL_PROPERTIES properties = new DWM_THUMBNAIL_PROPERTIES()
{
dwFlags = DWM_TNP.DWM_TNP_OPACITY | DWM_TNP.DWM_TNP_RECTDESTINATION | DWM_TNP.DWM_TNP_RECTSOURCE | DWM_TNP.DWM_TNP_SOURCECLIENTAREAONLY | DWM_TNP.DWM_TNP_VISIBLE,
fSourceClientAreaOnly = ClientAreaOnly,
fVisible = Visible & !IsFixed,
opacity = Byte.MaxValue,
rcDestination = new RECT(Location, Size),
rcSource = new RECT(DrawnRegion)
};
if (!DesktopWindowManager.Update(thumbnail, ref properties))
{
if (MessageBox.Show("サムネイルの更新に失敗しました。", "エラー", MessageBoxButtons.RetryCancel, MessageBoxIcon.Error) != DialogResult.Retry)
{
UnsetWindow();
}
}
}
}
private static extern int DwmUpdateThumbnailProperties(IntPtr hThumb, ref DWM_THUMBNAIL_PROPERTIES props);
public static bool Update(IntPtr thumbnail, ref DWM_THUMBNAIL_PROPERTIES properties)
{
return(DwmUpdateThumbnailProperties(thumbnail, ref properties) == S_OK);
}