How to maximize the IE window with ActiveX control created with VB?

The target application is the ActiveX control created with VB and it is usded on IE5.0.
I would like to know:
How to maximize the IE window which has the Visual Basic created ActiveX control embeded in it (F11).
- and -

How to determin from the ActiveX control if IE is currently maximized or not.
If I can manage to get the IE handle, I can do it but somehow it seems to be very difficult for me to implement.
If some one have a sample code for it.
Please give to me.
Thank in advance.