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i think you could use delphi's fascility to change string to number {strtoint()} and trap the procedure with Try except Example: Function ChekNumber(str:string):boolean var dummy:integer; begin try begin dummy:=strtoint(str); result:=true; end; except result:=false; end; and for the 5 digit, you can use length(string) to check the length of string i …
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