[DllExport("tks")]
public static void tks(IntPtr client, [MarshalAs(UnmanagedType.LPStr)] string args)
{
    OnTkState(client, args);
}

[DllExport("tkstate")]
public static void tkstate(IntPtr client, [MarshalAs(UnmanagedType.LPStr)] string args)
{
    OnTkState (client, args);
}

[DllExport("tkState")]
public static void tkState(IntPtr client, [MarshalAs(UnmanagedType.LPStr)] string args)
{
    OnTkState (client, args);
}

public static void OnTkState (IntPtr client, [MarshalAs(UnmanagedType.LPStr)] string args)
{
    // Must be the first thing in our extension.
    if (!InitApi(client))
        return;
    ...
}