The bug has been fixed in one of the hotfixes for VFP9SP2 http://www.berezniker.com/content/pages/visual-foxpro/vfp-90-versions

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>Desired dehavior : buttons.enabled = .t
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>Meanwhile found an article by Colin, confirming this is a bug, will look around if there is a bugfix, otherwise will have to construct myPreview as suggested by Colin.
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>http://spacefold.com/colin/archive/articles/reportpreview/techniques.htm
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>Regards,
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>Koen