define external switch function MailOutBoxIsInError
      value MailOutBox this-MailOutBox

This function returns true if the last operation on the MailOutBox resulted in an error, and false otherwise.

Note that any function in the Mail library can result in an error, except the following:

• MailInBoxGetStatusReport
• MailInBoxIsInError
• MailOutBoxGetStatusReport
• MailOutBoxIsInError
• MailLibraryVersion
• MailIsVersionCompatible

Argument:

• "this-MailOutBox" is an opaque object of type MailOutBox.

Example:

  halt when MailOutBoxIsInError MyBox