>_shellexecute is class that is defined in vfp98\ffc\_environ.vcx

OK. So you are basically doing something similar to the following:

oShellExec=NewObject("_shellexecute",Home(1)+"\ffc\_environ.vcx")
oShellExec.shellexecute("mailto:moe@howard.com?bcc=larry@fine.com&subject=test&body=body goes here")

Notice that what you are doing is just asking the Windows API to launch your default mail client. This could be Outlook Express, or Outlook or any other. The size limitation in the length of addresses depends on the email client you use. The way to get around it is to create a mailing list (group) and mail to that group, instead of concatenating all the addresses together.

HTH