Hi, Malcolm.

>>What kind of action you want to repeat this way?
>
>These are next, prev controls that allow a user to navigate through a returned set of records in "detail" mode.
>
>The users' expectation is that they should be able to hold the mouse down on a next or previous button to quickly move between records vs. having to manually click, click, click, [insert moan about carpal tunnel syndrome ...], click, etc.

I'm with Sergey in this. As this is not a standard Windows behavior for buttons, the user who asked for it would be happy, but any ther one who comes to use the application won't never find out. I'd use a slider control for this, maybe...

Hope this helps,