Try one of these:

=IF(B3="","",VLOOKUP(B3,Invertory!A1:B1000,2,0))

Or, this more generic version:

=IF(ISNA(VLOOKUP(B3,Invertory!A1:B1000,2,0)),"",VL OOKUP(B3,Invertory!A1:B1000,2,0))

--
Biff
Microsoft Excel MVP


"Jackie" wrote in message
...
k, that works but when there's nothing in B3 ("Part Number") then C3
("Current Balance") is giving me a #N/A error which I understand why but
can
i make that be blank when "part number" is blank?

"Shane Devenshire" wrote:

Hi,

Try something like

=VLOOKUP(B3,Invertory!A1:B1000,2,False)

This example assumes we are refering to the worksheet Inventory not the
workbook, but it will work with a workbook also. In that case open both
files and with your cursor in C3 of Tracking type =VLOOKUP(B3,
and then click in the other workbook, and on the correct sheet, and then
highlight the necessary range and complete the formula as above.
--
If this helps, please click the Yes button.

Cheers,
Shane Devenshire


"Jackie" wrote:

K, I have a drop down box in "Tracking" workbook B3 with "Part
Numbers".
When I choose one of the part numbers from that drop down box I want C3
("Current Balance") to update with a value from my "Inventory"
workbook.
"Inventory" workbook only contains column A: "Part Number" & Column
B:"Qty
in Stock"