Fortran - Visual Fortran V - cuadro dialogo

Estoy tratando de editar un dialogo y no funciona.
No aparece el cuador de dialogo y me da error la funcion MessageBoxqq.
unresolved external symbol _MESSAGEBOXQQ@20
Muchas Gracias
Elsa


El codigo es:

USE DFLOGM
! IMPLICIT NONE
INCLUDE 'script1.FD'
TYPE (dialog) dlg
LOGICAL return
INTEGER IDD_script1
INTEGER retint
LOGICAL retlog

CHARACTER msg
CHARACTER caption
INTEGER mtype

return = DLGINIT(IDD_script1, dlg )

retint = DlgModal( dlg )

msg = "HOLA"
caption = "HOLA"
mtype = 1

return = MESSAGEBOXQQ (msg, caption, mtype)


! Release dialog resources.
! CALL DlgUninit( dlg )
END