>The problem has occurred occassionally while dropping fields onto a container. Selecting the control or closing and reopening the the class has fixed it. The latest is a container class that has a pageframe and 20 other controls (comboboxes and textboxes). When working on the container class (Line_Info) in design mode the pageframe displays correctly. When I place the container class (Line_Info) onto another container class (Line_PageFrame) the pageframe's ActivePage property is set to 0 and the pageframe is not visible. I have to manually set the ActivePage property of the pageframe to 1 by editing the container class (Line_Info) place on the Line_PageFrame class. Anyone experienced problems with controls not being visible in design mode?
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>Thanks!

Slow down your Graphic card's Video Acceleration. That will probably cure it. Right click your Windows Desktop, choose Properties and on the Settings tab, click the Advanced button. In XP, it's then on the TroubleShoot tab and move the slider for Hardware Acceleration down. You might also need to look for updated video drivers.