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# ASP AddHeader Method * * Complete Response Object Reference](#) * * * The AddHeader method adds a new HTTP header and value to the HTTP response. **Note:** Once a header is added, it cannot be removed. **Note:** In IIS 4.0, you must call this method before any output is sent to the browser. In IIS 5.0, you can call the AddHeader method at any point in your script, as long as it is before the call to the response.Flush method. ### Syntax response.AddHeader name,value | Parameter | Description | | --- | --- | | name | Required. The name of the new header variable (cannot contain underscores). | | value | Required. The initial value of the new header variable. | * * * ### Example * * Complete Response Object Reference](#)