>I have written a form with some specific handling routines. All focus automatically shifts OUT of grid (to text search box) when clicked within grid (after moving focus). I have also modified the SCROLLED method of the grid to catch display changes when clicking and/or dragging on the vertical scrollbar.
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>This works except when I click somewhere on the middle of the scroll bar (not on the slidebox nor on either the top or bottom arrow... the grid moves accordingly but the inbetween area that I clicked on turns black and stays black. Where is that coming from?

Peter,
Check your scrolled event code has some lockscreen or offending code that prevents scrolling do its work.
Cetin