Simple IF url statment

 Hello there
 
firstly!  im new to asp,net so working my way round things
 
ive created a small form that submits an insert to a sql server! thats all working
 but once the form is submitted, i want it to say something like, thank you your entry was submitted
 
in php i would of redirected my page to something like register.php?complete=yes
 then do a if complete = yes echo " WELL DONE"
 
i can do the redirect no problem in asp.net! but how do i get the page_load script to pull the variable from the url and dispay it in a Label
 i.e!
pageload
if complete = yes
 
{
label1 = "well done"
}
 
also, if i want to get reallly clever! how would i extract the user that is logged in to say, well done XXX, for submitting your form (i have log in sections in place using membership roles)
 
&nb ...