void PbMouseDown(object sender, MouseEventArgs e)
{
var ctrl = sender as PreviewBox;
if (ctrl != null)
{
ctrl.Focus();
switch (e.Button)
{
case MouseButtons.Right:
ContextTarget = ctrl;
ctrl.Selected = true;
ctxtPlayer.Show(ctrl, new Point(e.X, e.Y));
break;
}
}
_lastClicked = flowPreview;
}