360 VGA Question

I posted this in the 360 boards but I don't think anyone over there is very tech savy.

I bought this monitor for my PC 2 days ago http://www.bestbuy.com/site/olspage.jsp?skuId=8894039&type=product&id=1211587387558 Its a nice monitor with both VGA and DVI input. Now my question is that I want to get the 360 VGA cables so I can plug them into my monitor. My monitor is currently hooked up from the DVI to my PC. So the VGA is free for use with the xbox 360. So once I get the cables and get it all hooked up. Can I switch between the 2 modes with no problem as if I had a console selector to swtich between my gaming systems. Like press a button on have my monitor go back to PC and press a button and it switches to my 360, How does this work?

I have a switch on my monitor now with that one im unsure best to check yourself if u have a laptop, or another computer just plug it up and give it a go. Or your display card should have 2 out, a vga, dvi plug both up like u are using dual monitors and try switching between them i know i can do it with mine so give it a go before u spend the $$ and c if it works

Cheers Trent