I don't think it is possible.

Discussion and a way to ease the process he

http://www.enhanceddatasystems.com/E...lInsertUDF.htm

Robin Hammond
www.enhanceddatasystems.com

"Microsoft" wrote in message
...
When a user starts typing an Excel 2002/3 function into a cell, the
context-sensitive help pops up a little box indicating what variables the
function wants. How do you add this capability to a UDF?