>With an admittedly very lightweight form (a couple of command buttons, spinners and labels), I wasn't able to duplicate this problem. Of course, this was in the development environment, but I did have a number of other apps open at the time. I tried using .Move(), resetting .Top and .Left, and even the Foxtools _Wmovp() function.
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>Something occurs to me, however. Perhaps I'm misunderstanding the problem. Are you trying to have the form move pixel by pixel across the screen, or just re-position it? My form, for want of a better word, "jumped" to the new position, but no trail. (Machine is a P200 with 32Mb).

Hi George - no, just one-step move. I've tested Move on my home PC this weekend, and have no odd delayed-jump or trail. I even loaded the form up with lots of pages, grids, etc., and still works just fine. Might be my work machine as John K suggested - I have a somewhat mimatched new pentium pro with a 3 year old 17" monitor. I'll test it on some other machines tomorrow...