msgbox window close aka "the red X"

[cmacrun]

I have a few messages boxes come up prior to a silent install of XPSP2 that give the user the option to delay the install. Problem I see is the window close aka red X is active and can be used to close the window instead of clicking Yes/Cancel. I would either like to disable or know the return value so I can catch it if a user clicks on it. Right now if clicked it just continues on with the script.....

Thanks much.

[cmacrun]

Sorry, it just occurred to me that I could easily figure that out. It returns a value of 2, same as cancel.

Sorry for the waste of space...it's monday!