Variable from Code Behind, being used on Web Form Page (VB ASP.NET)

I have a variable that in the Page_Load event of my code behind page is being used.  When the Page_Load event is over and the page loads, I need that variable to be in a link that is currently setup.  It is not a button or asp hyperlink of any sort.  The link is acutally in a part of an area map.  I just need to be able to send through the one variable when the user clicks on that image (part of the map).  Regular ASP tags are not working and I think my syntax is wrong.

"Register.aspx?Id=<%=Id%>"

How do I get my Form page to recongize that variable from my code behind?

Thanks in advance,
Eric
tgidirectAsked:
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samtran0331Commented:
in the codebehind, declare your variable outside o f any sub/function and make sure it isa public var...

like:
partial class webform1
inherits system.web.ui.page
public ID as integer
sub page_load...
ID =3
end sub
....
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tgidirectAuthor Commented:
Thank you.
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