I think you problem is not with the underscore, but trying to embed double
quotes within you string

formula = "=A1&""_""&B1"
? formula
=A1&"_"&B1



so double your double quotes when used within a string

--
Regards,
Tom Ogilvy


"CLR" wrote in message
...
Hi All.....

I am trying to use VBA to place a formula in a cell that is a
concatenation
of two cells using an underscore between them. The formula works fine
when
used on the sheet, but VBA balks at the underscores.......is there some
special combination of characters to allow the underscore.....

My code reads something like this

formula = "=A1&"_"&B1"

Any help would be appreciated,
Vaya con Dios,
Chuck, CABGx3