public static IOleDropTarget GetRegisteredDropTargetFromWnd(IntPtr hWnd)
{
IOleDropTarget pRetVal = null;
IntPtr pUnknown = GetProp(hWnd, "OleDropTargetInterface");
if (pUnknown != IntPtr.Zero)
{
Guid interfaceIdGuid = new Guid("00000122-0000-0000-C000-000000000046");
IntPtr outIntPtr;
Marshal.QueryInterface(pUnknown, ref interfaceIdGuid, out outIntPtr);
if (outIntPtr != IntPtr.Zero)
{
return((IOleDropTarget)Marshal.GetObjectForIUnknown(outIntPtr));
}
}
return(pRetVal);
}
public int GetDropTarget(IOleDropTarget pDropTarget, out IOleDropTarget ppDropTarget)
{
// Debug.WriteLine("GetDropTarget");
ppDropTarget = null;
return(HRESULT.E_NOTIMPL);
}
public int GetDropTarget(IOleDropTarget pDropTarget, out IOleDropTarget ppDropTarget)
{
ppDropTarget = null;
return(1);
}
public static extern int RegisterDragDrop(IntPtr hwnd, IOleDropTarget target);
public static extern int RegisterDragDrop(HandleRef hwnd, IOleDropTarget target);
public int GetDropTarget(IOleDropTarget pDropTarget, out IOleDropTarget ppDropTarget)
{
// Debug.WriteLine("GetDropTarget");
ppDropTarget = null;
return HRESULT.E_NOTIMPL;
}
public int GetDropTarget(IOleDropTarget pDropTarget, out IOleDropTarget ppDropTarget)
{
ppDropTarget = null;
return 1;
}
public static extern IntPtr RegisterDragDrop(IntPtr hwnd, IOleDropTarget dropTarget);
