NAME
        AddAppWindowA - add a window to Workbench's list of AppWindows.  (V36)

   SYNOPSIS
        appwindow = addappwindowa(id, userdata, window, msgport, taglist)
        D0                        D0     D1       A0      A1       A2

        struct appwindow *addappwindowa(ulong, ulong, struct window *,
                                        struct msgport *, struct tagitem *);

        Alternate, varargs version:
        struct appwindow *addappwindow(ulong, ulong, struct window *,
                                       struct msgport *
                                       tag1, data1,
                                       tag2, data2,
                                       ...
                                       TAG_END );

   FUNCTION
        Attempt to add the window to Workbench's list of AppWindows.
        Normally non-Workbench windows (those not opened by Workbench)
        cannot have icons dropped in them.  This call is provided to
        allow applications to be notified when an icon or icons get
        dropped inside a window that they have registered with Workbench.
        The notification consists of an appmessage (found in workbench.h/i)
        of type 'MTYPE_APPWINDOW' arriving at the message port you specified.
        What you do with the list of icons (pointed to by am_ArgList) is
        up to you, but generally you would want to call getdiskobjectnew on
        them.

   INPUTS
        id - this variable is strictly for your own use and is ignored by
             Workbench.  Typical uses in C are in switch and case statements,
             and in assembly language table lookup.
        userdata - this variable is strictly for your own use and is ignored
                   by Workbench.
        window - pointer to window to add.
        msgport - pointer to message port Workbench will use to send you an
                  appmessage message of type 'mtype_appwindow' when your
                  window gets an icon or icons dropped in it.
        taglist - ptr to a list of tag items.  Must be NULL for V2.0.

   RESULTS
        appwindow - a pointer to an appwindow structure which you pass to
                    removeappwindow when you want to remove the window
                    from Workbench's list of AppWindows.  NULL
                    if Workbench was unable to add your window; typically
                    happens when Workbench is not running or under low
                    memory conditions.

   SEE ALSO
        workbench.library/addappwindowdropzonea
        workbench.library/removeappwindow

   NOTES
        The V2.0 icon editor is an example of an appwindow.  note that app
        window applications generally want to call getdiskobjectnew
        (as opposed to GetDiskObject) to get the disk object for the icon
        dropped in the window.

        For this function call to succeed, Workbench must be open. This
        means that the LoadWB command was executed and the Workbench
        screen has been opened.

        When removing an appwindow, all its drop zones will be automatically
        removed.