how can I hidden the left panel of visio

[Tianbing]

I want to use drawing control in my application, but when I open a visio
document in my apps, the left panel(from which I can draw graphics to the
document) of the visio is visible. It make my apps less professional.
Who can tell me which attribute it about it, and how I can hidden it in my
application.
thanks

 

[junethesecond]

Process to eliminate left side is,
start visio, open the document,
select menu save as, click the
rev-triangle, set off the "save
working states", and save the
document.
Then, the document on drawing
control has no left side window.