void OleInterop.IDataObject.DUnadvise(uint dwConnection)
{
if (null != oleData)
{
oleData.DUnadvise(dwConnection);
}
else
{
bclData.DUnadvise((int)dwConnection);
}
}
/// <summary>
/// Unregisters a drag source from the internal cache.
/// </summary>
/// <param name="control">The drag source Control.</param>
public static void UnregisterDefaultDragSource(Control control)
{
if (s_dataContext.ContainsKey(control))
{
DragSourceEntry entry = s_dataContext[control];
ComTypes.IDataObject dataObjectCOM = (ComTypes.IDataObject)entry.data;
// Stop listening to drop description changes
dataObjectCOM.DUnadvise(entry.adviseConnection);
// Unhook the default drag source event handlers
control.GiveFeedback -= new GiveFeedbackEventHandler(DefaultGiveFeedbackHandler);
control.QueryContinueDrag -= new QueryContinueDragEventHandler(DefaultQueryContinueDragHandler);
// Remove the entries from our context caches
s_dataContext.Remove(control);
s_dropDescriptions.Remove(entry.data);
}
}