>Thank for your reply Dan.
>I did a test program with these line:
>#INCLUDE MENSAJES.H
>=messagebox("This is a test.",mb_iconostop,tit_aplicacion)
>
>But the result is the same.
>I dont'n what to do, please help me with an example (I you can):-)
>TIA


What does the relevant lines in your include file look like? You can also try testing for the existance of the defined constants with:

#IF mb_iconostop
MESSAGEBOX(TRANSFORM(mb_iconostop))
#ENDIF

to check to see if VFP is finding the contstants.

Are you sure the include file is in the path? Even if it's in the project, you'll need it in the path if your testing without a compiled APP or EXE.