How do i do a print form in asp.net

See more:

C#

ASP.NET

I just tried to print that form but am not able to achieve that .
  The page which will get printed is not the one the user is viewing,so the page should not be view-able  no form should be loaded behind 

What I have tried:

<STYLE type="text/css">
@media print {
.PrintOnly {font-size: 10pt; line-height: 120%; background: white;}
}
@media screen {
.PrintOnly {display: none}
}
</STYLE>