Locates the position of a string within another string.

function PosIdx(const ASubStr: AnsiString; const AStr: AnsiString; AStartPos: Cardinal = 0): Cardinal;

ANSI string values to be located.

ANSI string values to be searched.

Default value is 0.

Cardinal - Position where substring is located, or 0 when not found.

PosIdx is a Cardinal function that returns the position of a string in another string using a given starting position. ASubStr is the ANSI string to be located in AStr starting with character found in position AStartPos.

Use AnsiPosIdx to perform substring searches where arguments contain values in Multi-byte character sets.