Crash in CXTPControls::RefreshIndexes()

 

The scenario is that a CXTPFrameWnd derived report window is closing. This report window has a lot of XTP controls, menubars, etc associated with it. It appears that during control cleanup in the call to CXTPControls::RemoveAll(), the CXTPControls object comes across a control in the list that is no longer valid since it's vtable appears to be gone, so as soon as an attempt is made down in CXTPControls::RefreshIndexes() to invoke the SetParent() method on the control object, an exception is thrown and CObject::DumpContext() invoked. The control that it crashes on appears to have a m_controlType of xtpControlComboBox.

 

I'm not very familiar with this application's code base since I didn't develop it, but I'm suspecting there is some mismanagement of the XTP derived control objects going on.

 

Can somebody tell me how to go about figuring out what's happening?

 

Thanks in advance for the assistance.

 

J

 

It appears that I still have to delete it when the window goes away because when I don't, an exception gets thrown during shutdown of the application on a call to RtlVerifyHeap().

 

However, it is possible that the heap is corrupted by something else in the application.

 

So, my first question is: If I instantiate a CXTP control with new, does the CXTPControls object take care of the cleanup and delete it for me or am I supposed to call delete when the window goes away?

Hi,

 

You have create all controls using "new". CXTPControls will automatically delete them.

if you need member of CMainFrame add pointer and create it in constructor:

 

CXTPControlComboBox* m_pCombo

...

 

m_pCombo = new CXTPControlComboBox();

 

...

pToolBar->GetControls()->Add(m_pCombo);

 

Windows you can create as you need.

 

Only controls in CommandBars, Items in PropertyGrid, Items in TaskPanel have to be created dynamically.