Multiple Drag'n'Drop and HGLOBAL

[burgdavid]

Hello,<br><br>I have make a window capable of multiple drap'n'drop (with other windows with same capability) thanks to threads. But I would like to unallow a window to drop to itself.<br><br>I use COleDropTarget and COleDataSource (Visual C++ 6 SP3, Windows NT 4 SP6).<br><br>I though I can do this by searching the HGLOBAL pointer recevied during drop in a class member array of HGLOBAL pointers of each drag started and not completed. But when I make a little try, storing the pointer HGLOBAL of the last drag in a member variable and then comparing to the HGLOBAL recieve, the values where different !! Why this ?<br><br>In OnBegindrag method :<br><br>HGLOBAL hgFiles;<br>COleDataSource* pSource = new COleDataSource();<br>(... Initialisation of hgFiles ...)<br>pSource-&gt;CacheGlobalData(CF_HDROP, hgFiles);<br><br>Then I retreive the HGLOBAL this way :<br>(in OnDragEnter(COleDataObject* pDataObject, ...)<br><br>STGMEDIUM Medium;<br>ASSERT(pDataObject-&gt;GetData(CF_HDROP, &Medium));<br>ASSERT(Medium.tymed == TYMED_HGLOBAL); <br><br>Now, the HGLOBAL pointer is Medium.hGlobal.<br><br>But the two HGLOBAL doesn't match.<br><br>Any Idea ?<br><br>David Burg.