Thanks a lot Michael & Vlad for the tip. Hope I can contribute some in the future but I think I would be learning a lot lot lot more from you guys.

>So, what Vlad is saying (hope you dont mind Vlad): is at some point you may be storing an object reference to a property (or public var?) e.g. thisform.oRef = createobj(xxx), which you must be release before closing the form... HTH

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>After the menu disappears, I cannot close the form anymore by clicking on the x-close button on the upper right corner.Any body knows why ?