Share cookie values across sub domains

Hi Experts -

I have three sites that are all on the same domain, but with different sub domains.

Within the I create a cookie...

Dim aCookie As New HttpCookie("userInfo")
        aCookie.Values("UserID") = UserID
        aCookie.Values("FirstName") = First
        aCookie.Values("LastName") = Last
        aCookie.Values("Rights") = Rights
        aCookie.Expires = DateTime.Now.AddDays(1)

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I want to be able to access these cookie values from the other two sub domains?  Is there a way for me to modify the code I used to create the cookie OR the code below so I can access these values across sub domains?

Label1.Text = Server.HtmlEncode(Request.Cookies("userInfo")("UserID")) 

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Set the cookie without a sub domain.
cdemott33Author Commented:
Can you provide an example on how to do that?
Response.Cookies("CookieName").Domain = ""

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