Get screen Size

I think you could best do so in JavaScript...
With JavaScript you can get the screensize and there are also scripts available that will center the new window, regardless of the screen size. JavaScript can also very easily be programmed in your Perl script.

Use the following JavaScript code to open a new window centered on the screen, regardless of the screensize:

<SCRIPT LANGUAGE="JavaScript" TYPE="text/javascript">
<!--
var win=null;
function NewWindow(mypage,myname,w,h,scroll,pos)
     {
     if(pos=="random")
          {
          LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;
          }
     if(pos=="center")
          {
          LeftPosition=(screen.width)?(screen.width-w)/2:100;TopPosition=(screen.height)?(screen.height-h)/2:100;
          }
     else if((pos!="center" && pos!="random") || pos==null)
          {
          LeftPosition=0;TopPosition=20
          }

     settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no';
     win=window.open(mypage,myname,settings);
     }

// -->
</SCRIPT>

If you want more scripts for popup windows, have a look at http://www.dynamicdrive.com/dynamicindex8/popwin.htm

Hope this helps...

BA

You gave me a link to the page, which had the answer I need.

I tested TK and found out that you can create nice Windows with it, but they will look like an emulation of Unix Desktop on Windows platform.
I want a professionally looking Windows GUI Application, which Win32::Gui perfectly provides with, because it accesses the native Windows dlls for doing it.
That's why I stick with Win32-Gui and am happy with.
All the basic controls are there, enough for working with.

I am thankful you pointed out the link where I got the answer and since I am using version 0.665 of Win32::GUI this function might had been fixed and worked perfectly for me. I simply did not know it.

Thanks again.