>> BTW, that number is based on most monitors these days running at 70hz, and is a guess on my part (supported by some testing). I'm assuming that Windows sends a WM_PAINT message to all displayed windows immediately after the VBI.
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>I don't think that the vertical refresh rate of a monitor is related to Paint events. The former is a hardware "repainting" performed by the video card. The latter is a software event that occurs when a form or toolbar is repainted. A form or toolbar is repainted when part or all of the form or toolbar is exposed after it has been moved or sized, or after a window that was covering the form or toolbar has been moved. Using a Refresh method in a Resize event forces repainting of the entire object every time a user resizes the form or toolbar.

You're absolutely right. Bad testing on my part. I updated a label in the paint event, which, of course, caused paint to fire again, ad infinitum. Interestingly enough. If you resize a form and make it smaller, paint doesn't fire, but if you make it larger, it does. Further, it doesn't fire if you move the form.

However, it does still leaves open the problem. Unfortunately, it doesn't appear as if any of the events fire when the _SCREEN is resized. It would seem that the only way to handle the problem is to add a timer to the form.