Checkout ... ShowModalDialog in the javascript reference. It works quite
will if you want to use client side javascript.

"Alvin Bruney" <vapordan_spam_me_not@hotmail_no_spamhotmail.com > wrote in
message news:O%23p$8U5TDHA.1572@TK2MSFTNGP12.phx.gbl...
> You can use javascript to pop a window but modal functionality will not be
> available. Something like
> Response.write("<script>window.open( blah blah blah
> will pop a window from the code behind. I haven't yet found a way to do
> modals with web pages. Not sure if it is possible.
>
> regards.
> "Northern" <lifeng26@msn.com> wrote in message
> news:021c01c34e6e$1f262af0$a601280a@phx.gbl...
> > I need to write code in my command button ASP server
> > control click event handler to do a few things. The last
> > one of those things will be open a pop up browser window.
> > I also want this pop up window to be in modal mode. In
> > another word, the user can't go back to the parent window
> > before close this one out.
> >
> > I searched a lot of resources but still couldn't find a
> > way to do this.
> >
> > Could someone show me how to do this?
> >
> > Thanks a million!
>
>