Assuming we have a GroupBar,GroupBarItem and a GroupView, when changing the app threading model from STA to MTA (using an attribute), the following code: "GroupBarItem.Client = GroupBarView" is failed with exception "Drag Drop registration failed":
ADAdministrator Syncfusion Team November 1, 2004 04:33 AM
This does not appear to be a grid question, does it?
I think MTA does not support OLE D&D. So, you probably will have to make sure the AllowDrop property on all your forms and controls is set to false.