What you say, depends on which barcode you use, which font library you use and also on how your barcode reader is configured. If you use code128, spaces is NO problem! And with the right font library, you can forget about extra asterixes or other special signs, the library does it for you. The font library costs a few dollars, but life is much easier with it. :-)

>>hi,
>>thanks for advice.i will
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>If you go with the 3 of 9 barcode, and are printing the labels from Fox fields, you'll have to add an asterisk (*) at the beginning and end of the data in the field to make it work with the scanner or wand - at least with most of the 3 of 9 fonts. For example, if the value of PartNo is 12345 then you would use "*"+alltrim(str(Partno))+"*" as the label.
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>You also have to be careful about using spaces in the bar code - it doesn't understand them. You'll have to replace the space with an underscore to get it to scan - something like this: "*"+leftstrtran(alltrim(matl)," ","_"),14)+"*"