Yes it has been discussed already. Check http://www.west-wind.com/wconnect/weblog/ShowEntry.blog?id=597 and http://weblogs.foxite.com/kevinragsdale/archive/2007/02/04/3231.aspx

>I am seeing some odd behavior with some of my windows in VFP 8 and 9 with windows vista and the Aero interface. In certain situations, when a form is displayed, the title bar and border will be completely invisible. the border is there, as I can still click where it should be and move, resize, maximize the form, etc. I haven't been able to narrow it down to the simplest scenario that produces it yet, but I have finally seen it when running a form from of the IDE.
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>The form in question is filled by a pageframe, and has code in the init that sets the active page. If a certain page is activated, I need to make sure that some supporting software is installed so I use WSH to launch an installer, and then provide some feedback based on the result. If I remove the code in the activate of that page, the form displays properly, but with the activation code in, the borders and title disappear. This problem occurs with themes = .t. or themes = .f.
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>Has anybody else observerd this. Does anyone have any suggestions?