MediaControl.SetWindow (gb.media)
Sub SetWindow ( Control As Control [ , X As Integer, Y As Integer, Width As Integer, Height As Integer ] )
This methods tells the 
MediaControl to draw its output inside a specific GUI control.
  - 
Control : the control where to draw.
- 
X, Y, Width, Height : A target rectangle inside the control. If not specified, the entire control surface will be used.
Only controls that implement the GStreamer "X-OVERLAY" interface support that method.
The target control must have its own window.
To ensure that requirement, use a 
DrawingArea with the 
Cached property set.