In xl2000 the closest to your code is:
ActiveWorkbook.Worksheets("Exec Summary").Range("K5:K41").Sort _
Key1:=Range("K5"), _
Order1:=xlAscending

The full parameter list is key1, Order1 As xlSortOrder, Key2, Order2,
Key3, Order3, Header As xlYesNoGuess, OrderCustom, MatchCase,
Orientation As xlSortRows, SortMethod As xlSortMethod
I'm not sure if there were any changes between xl2000 and xl2003.

You could check what version of xl is running using
Application.Version

Regards,
Andrew

On 31 Aug, 12:03, Ray wrote:
Hi -

Using XL07 in Compatability Mode, I've created what I *thought* was a
relatively simple procedure to sort a range based on a user-selected
cell. *For example, if user clicks on cell D3, the range A4:Z50 is
sorted based on values in column D.

The procedure ran fine on my computer, but when a native XL03 user
clicks on a 'header' (in row 3), the procedure throws an error:
Compile Error: *Variable Not Defined
with SortOn:=xlSortOnValues highlighted as the error.

The whole line is:
ActiveWorkbook.Worksheets("Exec Summary").Sort.SortFields.Add
Key:=Range( _
* * * * * * * * "K5:K41"), SortOn:=xlSortOnValues, Order:=xlAscending,
DataOption:= _
* * * * * * * * xlSortNormal

Is 'xlSortOnValues' referencing an Object Library that's not available
by Default? *Can I programmatically check for it (on the user's
machine) and activate if not already available?

Any help is greatly appreciated!

Thanks, ray