[AccessD] Date format

Hello Group,

i use mailmerge (Helen Feddema Code2) within access to create wordletters.
in access the
format for dates is: dd-mm-yyyy.
When the data is placed into the wordletter by the following function
{DOCPROPERTY "GebDat" \*MERGEFORMAT}
the dateformat changes to mm/dd/yy.

Is there a way to get the same format as in access

TIA

Pedro Janssen