Exception error when IOleInPlaceObject.UIDeactivate() is called?

[chowchow2469]

Hi,

I have an unhandled exception error when I exit my program. I am using Visual C++.NET and current I want to put the AxCWButton object in my windows form. What is weird is when I exit my program, there is a null reference exception when

System.Windows.Forms.IOleInPlaceObject.UIDeactivate() is called. I am unfamilar with the internals so I do not the significance of this method.

System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Windows.Forms.IOleInPlaceObject.UIDeactivate()

If I remove the AxCWbutton, my program exits fine. The null reference exception only occurs when I add the button to my form. I did not change any code, and used the automatic referencing style visualc++.NET uses when adding any objects

onto a form. Any help would be greatly appreciated. Thanks!

I declare the object like so in my forms.h:

private

: AxInterop::CWUIControlsLib::AxCWButton * button1;

[bilalD]

I just tried this and I didnt see the problem you mention. Do you have a sample I could look at?
Thanks

[chowchow2469]

Hi,

I just fixed the problem. The method I used to close my program was exit(). I changed it and use Close() instead, which fixed the exception error. Although I do not know the reason behind the exception, changing the exit function worked. Thanks anyway!