Return the first response header field name and value.
- A string that will contain the name of the first header field
returned by the server.
- A string that will contain the value of the specified header
field when the method returns. This parameter must be passed by
This method returns a Boolean value. If the method succeeds,
it will return True. If the method fails, it will return False.
The GetFirstHeader method is used get the first header
field name and value from the response header returned by the server.
This method should only be called after the client has requested the
resource. This method is typically used in conjunction with the
GetNextHeader method to enumerate all of the response header
fields returned by the server.