>I've found that when using scrollbars to display a large object (image) in a viewport, there seem to be some undocumented maximums imposed. For example, the largest image height I can use is about 2400 pixels. Anything on an image taller than that (assuming image TOP=1 on form) is clipped from the bottom of the image with no warnings or error messages.
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>Can somebody fill me in on what the rules are here and what's really going on? I don't think this is the famous (disappearing) scrollbars bug. It seems to be an OS limitation or something.
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>Thanks very much.

Mark,
While the scrollbars may not disappear due the the behavior described in MSKB#216985, the article does describe a limit to the scrolling capabilities. As such, there is really a limit to the size a form can be. If the size limitation is also attributed to the controls on the form (in this case an image control) then this might explain what you are seeing. If you also have the Stretch property of the Image control set to 0 (Clip) then it will cut the image off without warning because you told it to do this.

HTH.