This sounds like a video driver issue.

>Yes it's VFP only. And the same behavior under Win 8.1 or 8.
>
>And yes, the problem came's Up also by the [WIN]+Cursor shortcuts.
>
>
>>>Hi @all,
>>>
>>>with Windows 7 Microsoft introduced the application Docking by Mouse.
>>>Bud with FoxPro I have one Problem:
>>>With 2 Monitors i can't dock the FoxPro Main Screen on the left Monitor's Top.
>>>On the right Monitor it works 8-)
>>>
>>>The Same behavior can be reproduced in our FoxPro - Application.
>>>
>>>Did someone have an Idea to solve this?
>>>
>>>Greetings from Germany
>>
>>Is this VFP only?
>>
>>Possibly the compatibility settings?
>>
>>Have you tried [WIn]+Cursor? It moves the Windows around and dock.
>>
>>I use Win 8.1 and it works with all 3 Monitors.
>>
>>I can not remember WIn 7 on that. :(