Video On Fullscreen Mode?

I need to create a vb-application which plays video-files as a fullscreen mode on computer's external screen. At the sametime user must have control to these files on another screen shown on the computer's (laptop) own screen.

So far I have managed to open the videofile as a fullscreen mode so that user has to first drag the videopanel (not a problem in this case) to the another screen and then click the "Fullscreen"- button on the control-form. Now the problem is that when another screen is playing on a fullscreen-mode and user clicks the control-form on the main screen: the fullscreen-mode ends and the videopanel results to the video's actual size.

Is there any solutions to this? So I'd need to continue the fullscreenmode on the other screen while there are user actions on the main screen. I am using DirectX / AudioVideoPlayback by Visual Basic 2008 Express Edition. And yes, I am quite a newbie with VB-related things :)