Hi!EveryBody:

Sorry,I Resolved it myself.The question is that i add a FFC's _Resizable class onto the top-level,and call it's addjustcontrol() method in form's resize event.After this form's queryunload events have done,the form unexpectadly call this contorl to resize every control on the form !

Then, When i find this fact, I add a "startexit" property to the form,and set this property to .t. in form's QueryUnload events,then, in this form's resize events checked this property before call _resizable' addjustcontrol method.

OK, that's i how to resolved the "cannot access the selected table" problem.Do you Surpprise? :-)