Try

Thisform.wmp.fullScreen= .t.

>Dear Friends,
>
>Please kindly help me to solve the following problem in my form:
>1- There is a form which I inserted a Windows media player ActiveX control on it.
>2- I want to play an MPG file in full screen mode with following commands:
>
>* the name of Windows media player ActiveX control in my form is "wmp"
>
>Thisform.wmp.uiMode="full"
>Thisform.wmp.fullScreen= "true"
>Thisform.wmp.controls.play()
>
>But I encounter with the following error:
>"OLE error code 0x8000ffff: Catastrophic failure"
>
>in the case of playback the video clip in normal mode, there is no any problem but immediately after asking to play in full screen mode, it will show the above error message.
>
>As always just I can say thank you in advance.
>Farhad