I am converting an app to OS5 and the way bitmaps are handled in OS5 are different than in previous versions. Specifically, bitmap data may not be in contiguous memory like in previous versions. The actual bitmap data may reside at a different memory location than say the header.
Why not just draw the strokes the user makes to an offscreen window, copying that bitmap to the main window after each penMove? That would give you a nice, offscreen bitmap that you can save, plus also handle window updates nicely, while avoiding the complications of capturing part of the screen.
-- Ben Combee, senior DTS engineer, PalmSource, Inc. Read "Combee on Palm OS" at http://palmos.combee.net/
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