I am using Harlan Grove's PULL function to grab data from other
spreadsheets, and it mostly works except that some strings that look
like dates get converted to numbers and therefore don't work with
VLOOKUP and the like. For example, "06-6107" gets changed to
1536728. It seems that this is happening in this bit of code:

For Each c In r
c.Value = xlapp.ExecuteExcel4Macro(b & c.Address(1, 1, xlR1C1))
Next c

The Value property is a Variant, so in the conversion the string is
interpreted as a date. Is there any way to force that to be converted
a Variant/String instead of Variant/Double?

Thanks,
Paul