SETFILTER

void SETFILTER(string FieldName, 
  string Filter = "", 
  string replaceString1,
  string replaceString2, 
  ...);

Use this function to set a filter.

This is wrong:
SalesHeader:SETFILTER('Posting Date', 
    '14.03.2014..');

The filter string must have logic operators and/or parameters %1, %2 only, but no data. Always put data into the arguments.

SalesHeader:SETFILTER('Posting Date','%1..', 
  FromDate);

Set a filter starting with the value FromDate.

SalesHeader:SETFILTER('Posting Date','..%1', 
  ToDate);

Set a filter ending with value ToDate.

SalesHeader:SETFILTER('Posting Date', '%1..%2', 
  FromDate, ToDate);

Set a filter starting from FromDate to ToDate