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Return a part of the string
Source position: syshelph.inc line 174
public function TStringHelper.Substring(  | 
AStartIndex: SizeInt  | 
):string; overload;  | 
AStartIndex: SizeInt;  | 
ALen: SizeInt  | 
):string; overload;  | 
SubString returns the portion of the string starting at (zero-based) index AStartIndex with length ALen. If ALen is omitted, then all remaining characters are returned.
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Insert a string at a given position  | 
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Copy part of a string.  | 
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Return the string as an array of characters.  |