Re: Drag and Drop - a question
- Posted by andi49 May 03, 2011
- 1311 views
Hallo
This could be a common problem (feature) with Win7. You can test it. It should only appear if you run your program as Administrator.
In Win7 lower privileged Processes are not allowd to Drag Files to higher privileged Processes. In your case I think you start your program as Admin. Drag and Drop should work from other programs you started but not from lower privilegd ones (say Explorer).
This is bcause some Messages are filterd, with this UAC thing on, and you must explizit allow this messages to reach your high privilegd App.
The following is from MSDN:
ChangeWindowMessageFilter (WM_DROPFILES, MSGFLT_ADD) ChangeWindowMessageFilter (WM_COPYDATA, MSGFLT_ADD)
Wrapping this ApiCalls should not be this hard
Hope this helps Andreas
