NAME
        DoDTMethodA - Do a datatypes method.                    (V39)

    SYNOPSIS
        retval = DoDTMethodA (o, win, req, msg);
        d0                    a0 a1   a2   a3

        ULONG DoDTMethodA (Object *, struct window *,
                           struct requester *, msg);

        retval = DoDTMethod (o, win, req, data, ...);

        ULONG DoDTMethod (Object *, struct window *,
                          struct requester *, ulong, ...);

    FUNCTION
        This function is used to perform a datatypes method.

    INPUTS
        o - Pointer to an object as returned by newdtobjecta().

        win - window that the object is attached to.

        req - requester that the object is attached to.

        msg - The message to send to the object.

    RETURNS
        Returns the value returned by the method.

    SEE ALSO
        intuition.library/DoGadgetMethod()