filter criteria for data type code

Please help me out with the filter criteria for a field which data type is code. We have some item names with ‘.’ for example: “baby.blk pants 12” and the data type is code. We have tried to pull out all the items with a’.’ with the filter .----have no problem at all. however, if we try using <>. or <>*’.’ to filter out all the itmes with ‘.’; we couldn’t do it. Does anyone know why? Or which criteria we should enter to take out all the items without a ‘.’ in it? Thanks for all your help![:D]

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