MapChar and UpperCase

[Jurand]

Hi everybody

I have "critical" problem. The software I use uses Upper to convert lower chars to upper and Lower function to convert upper case to lower case. :-)) Yes it's easy. But what about national signs like german omlauts, french letters with accent, polish letters with "birds" .I've found function MapChar - ok this solves comparision problem but I need function that directly converts these signs (using eg Lower or Upper). Interbase, MSSQL and Oracle have this feature using codepages. Converting in application maybe is the way - but my very large app uses some components that are difficult to rewrite only for SAP DB.
May I write my function (eg UpperPL ) that converts these signs (any axamples please) ??????

Tomasz



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