>>It is near the right edge of the form, but not all the way at the edge. Probably 50 pixels from the edge. The form is smaller than the max design area...
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>I would make a copy of the form and start deleting visible controls one by one and check if unresponsive area still there. At the end you can use Class Browser, as Alan suggested, to see what left.


More info....this area is on the first page of a page frame. On the 2nd and 3rd pages are list boxes. It appears the "dead" area on the first page is exactly the area of the vertical scroll bar on the list boxes on pages 2 & 3. Thes list boxes are intially disabled. It's like that scroll bar is bleeding through to the 1st page and making that area of the form disabled.

However, once you click on page 2 or 3, then return to the first page, this area is no longer "dead".