Determines whether or not the Begin-Drag Event will be suppressed for the dialog element. If it is suppressed, the dialog element will not get control when a drag-drop operation is commenced and the dialog element is used as the drag source. This leaves the drag-drop clipboard empty and thus causes the drag-drop operation to be implicitly cancelled.

Applies to	ActiveX control, bitmap control, list box control, list view control, tree view control.
Data Type	I4
Default Value	1 (SUPPRESSED)
Possible Values	0 (NOT-SUPPRESSED) / 1 (SUPPRESSED)

Note:
You can use the symbols SUPPRESSED and NOT-SUPPRESSED defined in the local data area NGULKEY1. NGULKEY1 is automatically included in your application.