I want to have same page header 
Frame or User Control is much better?
And what is the different between then?
Thx

They are completely differn't.

Use a user control if your going to use that bit of UI.

A Frame is for seperation, not for reuse (User Control).

Use a user control.
Frames can be difficult in ASP.NET and you probably shouldn't mess with them
unless you're very comfortable with client side javascript.

Here's more info:
http://SteveOrr.net/faq/UserCustom.aspx

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Please...Expert needed.
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