Html Hyperlink.. running Code Behind function...

Hi,
I got an Error Label which I change it's error msg while needed,
on of it's error:
Error.Text = "For sending again activation email for your acount <a style=\"color: #FF0000\" href=\" \">press here</a>.";
Now,
The Sending activation email is a Code behind function (in aspx.cs file)
how to run it when pressing this Hyperlinklink?
Thanks...
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