Re: Getting Combo Box Drop Down Button hWnd?

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Hi Larry,

If you want to know the amount of user data bytes the control reserved you
should call
GetClassLong(hControl,GCL_CBWNDEXTRA)
and to know how user data bytes are reserved for the control class you should
call
GetClassLong(hControl,GCL_CBCLSEXTRA)
Obviously those memory spaces are reserved by the control for internal use and
you should not write to it.

regards,
Jacques Deschênes

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