Resizing grid by client screen size

[inossyrow]

I want to set datagrid's size at page load by client screen size. Is there any way to get this size at page load or other page events on server side?I use \[code\]Request.Browser.ScreenPixelsWidth\[/code\] and \[code\]Request.Browser.ScreenPixelsHeight\[/code\] but these sizes is not true. these sizes is always 640 * 480.