Re: IDropSource and IDataObject MultipleInheritance

"Alexander Nickolov" <>
Tue, 12 Jun 2007 10:07:58 -0700
Already addressed in the COM/OLE group. Please don't multipost.

Alexander Nickolov
Microsoft MVP [VC], MCSD

<> wrote in message


It will good help if you can resolve following issues I have come
across. Please also provide MSDN/Microsoft write up on the same.

1) I inherit my interface from IDropSource and IDataObject together.
Multiple inheritance basically.
I needed to understand what threading issues can come due to the same.
One of this is invoked by ActiveXContainer and anothere by
Considering all possibilities including Multi processor machine
configuration, I need to understand if this would fail in any
scenario. What does Microsoft talk about this scenario.

2) When I do drag and drop operation using CF_HDROP on a file names
"setup.exe" it fails on Windows 2000, but works on WindowsXP.
Basically the file does not get copied from Temporary folder to the
DropTarget. Any technical explaination for this behavior.

Alpana Dhole

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