CListbox::SetItemData/SetItemDataPtr

If I need to associate a CObject derived class pointer with a CCheckListBox line, which function should I use - SetItemData (w/appropriate cast) or SetItemDataPtr ? The documentation seems to indicate that SetItemDataPtr actually points to the listbox entry itself (possibly for owner draw?)
xn12z9iAsked:
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McCrearyConnect With a Mentor Commented:
I have used both from time to time.   Both of these are just a way for you to associate data with the item in a CListBox. (CCheckListBox is inheirated  from CListBox I think)  The SetItemDataPtr is probably "best" simply because it is a pointer rather than a long integer and the cast is safer.

As an additional note, I have encountered more than one programmer getting memory for the CObject (or whatever) class, assigning it to the SetItemDataPtr, and then forgetting to delete the instances when the dialog holding the CListBox closes.
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