Can the pre-commit hook sent a message to TortoiseSVN, if it allows a commit?

Subject:
 Can the pre-commit-hook sent a message to TortoiseSVN,
 if it allows a commit?

It can sent a message, when I write in the STDERR string
(done in a Perl-file) and return error ("exit 1")
from the pre-commit.cmd file
(which by the way has executed the Perl-file).

A message don't show up, if I return ok ("exit 0").

How can a message come through, if i want to allow a commit?

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