C# Signature:

    [DllImport("wininet.dll", CharSet=CharSet.Auto, SetLastError=true)]
    static extern bool InternetSetCookie(string lpszUrl, string lpszCookieName, string lpszCookieData);

VB Signature:

     <DllImport("wininet.dll", CharSet:=CharSet.Auto, SetLastError:=True)> _
      Public Shared Function InternetSetCookie(lpszUrl As String, _
      lpszCookieName As String, lpszCookieData As String) As Boolean
     End Function

User-Defined Types:

None.

Alternative Managed API:

Do you know one? Please contribute it!

Notes:

None.

Tips & Tricks:

Please add some!

Sample Code:

bool b = InternetSetCookie("http://localhost/", "keyname", "value; Expires = " + DateTime.Now.AddDays(10).ToString("R"));

http://msdn.microsoft.com/en-us/library/aa385107(VS.85).aspx

Note: couldn't figure out how to add a new fcn, so I'm adding this here:

C# Signature:

    [DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
    static extern bool InternetSetCookieEx(string lpszUrlName, string lpszCookieName, string lpszCookieData, uint dwFlags, IntPtr dwReserved );

Sample Code:

InternetSetCookieEx("http://foo.bar.baz", "COOKIE_NAME", "COOKIE_VALUE" "; Expires = " DateTime.Now.AddDays(10).ToString("R"), 2147484672, IntPtr.Zero);