internal void Update()
{
if (!IsLoaded || !IsVisible)
{
return;
}
if (thumbnail == IntPtr.Zero && taskview.Handle != IntPtr.Zero && window.Handle != IntPtr.Zero)
{
Thumbnail.DwmRegisterThumbnail(taskview.Handle, window.Handle, out thumbnail);
}
if (thumbnail != IntPtr.Zero)
{
Thumbnail.DwmQueryThumbnailSourceSize(thumbnail, out var size);
var destination = CalculatePhysicalDestination(size);
var properties = new Thumbnail.Properties
{
Destination = destination,
Flags = Thumbnail.DWM_TNP_RECTDESTINATION | Thumbnail.DWM_TNP_VISIBLE,
Visible = true
};
Thumbnail.DwmUpdateThumbnailProperties(thumbnail, ref properties);
}
}