I have a UDF that goes off and retrieves various pieces of data from a
database based on parameters that the user enters into the UDF. Some of the
data in the DB are strings, and others are Integers or Doubles.

My UDF returns a string so that any of those values can be displayed (i.e.
ints and doubles from the DB are converted to string in my method that calls
the DB).
Public Function MyUDF(param1, param2) As String

If a value coming back from the database is the number 3.51, the UDF returns
it to the calling cell as "3.51". If I try to format this in Excel and ask
it to display one decimal point, for example, it does nothing because it
treats 3.51 as a string.
If I wrap the call to the UDF with =VALUE, that works, but I wanted to avoid
having the user have to do this. I also wanted to avoid having seperate UDFs
for each return type (i.e. one that returns String, one that returns
Integer, etc.)

Does anyone have any suggestions?