/// <summary>
/// Used to pump any pending COM messages. This should be used only as a part of
/// synchronizing or to effect a block until all other threads has finished with
/// their pending COM calls. This should be used by the UI thread **ONLY**;
/// otherwise execptions will be thrown. This is mandatory when the COM objects are
/// STA which would otherwise deadlock in other threads.
/// </summary>
/// <remarks>
/// Typical use would be within a event handler for an event belonging to a COM
/// object which require some synchronization with COM accesses from other threads.
/// Events raised by COM are on UI thread by definition so the call stack originating
/// from COM objects' events can use this method.
/// </remarks>
/// <returns>Count of open forms which is always zero for VBA hosts but may be nonzero for VB6 projects.</returns>
public int PumpMessages()
{
CheckContext();
return(_runtime.DoEvents());
}
public int DoEvents()
{
return(_runtime.DoEvents());
}