Drag and drop pdf files to Acrobat plug-in dialog

Hi guys,

I have an Acrobat plug-in application based on ASDK7 use MFC, it has a UI dialog could make user add files to the dialog.

Now, I need to implement drag and drop files to the dialog.

But the file is simply opened by Acrobat always when I drag&drop files.

Drag&drop works fine in simple MFC project in Windows 7.

Is there need any settings in Acrobat preference?

Or how can I stealing drag acceptance from Acrobat App class in code?

Thanks a lot!