🚀 go-pugleaf

In PM, when the user tries to change focus to another application(window), 
PM sends a focus change message to the current wnd proc.  However, it seems
that message never get sent as long as the current application message queue
is not empty.  Basically, if the application is posting a lot of messages to
its own message queue, the wnd proc will not get the focus change message 
until it clears all the messages.  In this case, the user cannot change focus
until the wnd proc finishes all the messages on the queue which can be quite
some time.  It means the user cannot do anything during that period of time.
Has anyone experienced the same problem??  Is there any work around for this
problem?  How get the wnd proc get to the focus change message ASAP?

Philipe