I. Hola Liliana, en mi caso desconozco la respuesta y no soy usuario habitual de Access pero ví una información que deseaba trasladarle -enlaces-, por si pudiesen serle de utilidad mientras le atiende un experto de primera mano. Le ruego me disculpe la imprecisión y las molestias de lectura, mucho ánimo.
https://www.todoexpertos.com/preguntas/6r8nxdv8ouhtxad7/poner-nombre-registro-en-msgbox
https://stackoverflow-com.translate.goog/questions/21088461/how-to-get-specific-id-from-access-table-in-a-msgbox?_x_tr_sl=en&_x_tr_tl=es&_x_tr_hl=es&_x_tr_pto=sc
https://stackoverflow.com/questions/66334249/i-want-the-corresponding-id-of-last-record-in-ms-access-to-appear-inside-a-messa
https://stackoverflow-com.translate.goog/questions/43858382/access-display-message-box-if-query-conditions-met?_x_tr_sl=en&_x_tr_tl=es&_x_tr_hl=es&_x_tr_pto=sc
https://stackoverflow.com/questions/17577150/vba-to-show-message-box-if-update-query-changes-1-row-show-another-if-none
https://www.youtube.com/watch?v=AefNBiIJNhg
https://analysistabs-com.translate.goog/vba-code/excel-projects/data-entry-userform/?_x_tr_sl=en&_x_tr_tl=es&_x_tr_hl=es&_x_tr_pto=sc
https://www-access--programmers-co-uk.translate.goog/forums/threads/how-to-messagebox-contents-of-a-table-with-a-button.123879/?_x_tr_sl=en&_x_tr_tl=es&_x_tr_hl=es&_x_tr_pto=sc
http://leandroascierto.com/foro/index.php?topic=2382.15
https://www.youtube.com/watch?v=G-mnPBr3Jwg
http://www.mvp-access.com/foro/validar-registro_topic84859.html