I've taken on the task of writing a more formal and community-standards based ExcelCOM UDF, with the idea that I'd eventually propose it for inclusion with the extensive UDF set AutoIt installs with now. This set of routines differs from Randallc's in a few important ways: 1. Instead of opening and closing the document for each call, my routines offer more flexibility. Basically, you call a function to open/create the workbooks, call others to write/read/format the workbook by active s