COleControl OnClose is overridden but never starts

Question

I am writing an ActiveX control for a webpage using MFC. When the explorer closes, some resource must be freed before the main control window is destroyed. I did a search and found that the overridden function COleControl::OnClose(DWORD dwSaveOption) should be a good place to do the release task. Therefore, the following changes were made to my code:

• Add the following line to my control declaration in the header file:

    virtual void OnClose (DWORD dwSaveOption); 

• Add the following lines to the control file:

    void MyControl :: OnClose (DWORD dwSaveOption)
   {
       // some code that do relesing job
       COleControl :: OnClose (dwSaveOption);
   }
  

I think that when closing the explorer MyControl :: OnClose should execute, but that is not the case. Am I missing something to override the function correctly, or is the OnClose function not suitable for this?

Answer 1

I personally override COleControl::OnDestroy() for cleaning. Are you missing any event receiver registration call to enable Close? Or a record on the dispatch card?