PDA screen flicker when updating control properties

Hi all,
I'm developing a mobile application for Windows Mobile 5 using LabVIEW 2009 SP1 and the Mobile Module. After coming to terms with many of the limitations, I've got a simple menu driven interface working. The interface consists of a transparent 240x320 picture control to which I draw the menu item text using the Draw Text At Point VI, along with an icon representing the menu item. Behind this picture control is a second picture control which contains the selection graphic to show which menu item is highlighted.
The problem I'm now facing is an annoying screen flicker every time a control property for the selection graphic is set. Specifically when the user navigates the menu using the up/down arrows on the device, the menu selection on the screen is moved using the Position->Top property to move it to highlight the correct menu item. Whenever this property is set, the whole screen flashes white and redraws.
Presumably this is due to the top level picture control being redrawn when the underlying control is updated (which makes perfect sense), but I wish it wasn't so noticeable.
So a couple of questions:
1. Is there any way to enable double-buffering of the display from the Mobile Module or on the device itself?
2. Is my picture control behind picture control design flawed? I would use a system listbox for the menu but it's a bit ugly, and doesn't support icons/symbols under the Mobile Module. Other limitations of the Module Mobile (like string controls that can't have transparent backgrounds) led me to use picture controls as the best overall solution.
Cheers,
Michael

Thanks everyone for the feedback.
I just did a day's worth of testing using C# and .NET for Windows Mobile (in Visual Studio 2005) and was able to reproduce the same interface without any flickering issues. Not having to poll the device's hardware buttons is also a positive
The key is to override the main form's OnPaintBackground() method.
From "Crafting Smartphone User Interfaces Using .NET Compact Framework":
OnPaintBackground
This method needs to be over ridden to prevent the OS from repainting the background each time the user navigates the ListView, causing flicker. If you don't need a background then just override this method but provide no implementation.
So it looks like I'll be doing things in C# for this project. As the mobile device won't be used for data acquisition, the Mobile Module isn't a necessity. I just hope .NET's serial functionality is as good as LabVIEW's!

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Thanks everyone for the feedback.
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PDA screen flicker when updating control properties

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