Malcolm,

I wouldn't rely on grid thumb because most of the time VFP doesn't place it correctly anyway. Is additional info a current row related?

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>>Why do you need to know this? There might be some other ways to accomplish what you are ultimately trying todo.
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>A customer has asked if I could place some status information to the right of the thumb - basically a small caption control that would move in parallel (in synch) with the thumb.
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>I know there's a zillion other ways to provide status info (tooltips, statusbar, stationary caption, dynamiccolor/font effects), but my app is replacing a Flash based front end where the original developer did a nice job implementing a similar interface - an interface that my customers love. My goal is to match the original visual interface as closely as possible. Confession: Right or wrong, it would kill me to concede that this is one of those things that VFP just can't do. ;)
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>>If you check for color change you can locate the thumb regardless of theme settings.
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>In theory, yes, but there are some gotcha's along the way: most XP themes fill the scrollbar region with gradients so detecting color changes is a bit more complicated. Non-themed scrollbar regions are filled with a checkboard pattern whose gray color is also used in the thumb itself. I suspect there's a simple way to handle this, but I think I'm too close to the problem to see the elegant solution.
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>Thanks for your help, Dave.
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>Malcolm