Oleg,

FYI, this is a bit more involved if you want to preserve the ability to reorder tabs (which I do) without re-implementing tab reordering in user code or modifying Codejock source. As suggested, I can get the mouse button down events and then track mouse movement, but I will have to bypass XTP tab reordering code to do it. I thought I might set up drag/drop information and then track the mouse when came into the tree view window, but XTP displays a "no-drop" cursor (resource ID: XTP_IDC_WORKSAPCE_DELETE, nice spelling by the way ;-)) when the mouse tracks outside the MDI tabs. If I call the parent class's mouse tracking methods CXTPTabClientWnd::CWorkspace::ReOrder() will display a "no-drop" cursor when the user tracks outside of the allowable drop region (MDI Tabs). It does this by "manually" processing events in a loop so I can't get ON_MOUSELEAVE and reset the cursor. There may be other issues with mouse capture, etc., but I didn't look into it further.

I will pass on implementing this for the moment because I've got other stuff to do. If I find a better solution I will post it here. (Or if I'm missing something, let me know.)

Thanks,

Jay

I have an application used to create courseware for online presentation (see compacted image.) It uses a tree view in a docking pane as the course outline and supports several editor types (similar in style to Visual Studio) in a CXTPTabClientWnd tabbed interface. I need to allow users to drag an editor tab onto the tree view to an existing item to replace it's content (for some reason, a much requested feature...) Are there any hooks in the interface (none that I could find) that support anything like COleDropTarget (which I already use to support drag/drop from the Windows shell)?

Thanks in advance.

Jay