RAD Studio VCL Reference
SysUtils.AnsiStrPos Function

Returns a pointer to the first occurrence of a substring.

function AnsiStrPos(Str: PAnsiChar; SubStr: PAnsiChar): PAnsiChar; overload;
function AnsiStrPos(Str: PWideChar; SubStr: PWideChar): PWideChar; overload;
PAnsiChar AnsiStrPos(PAnsiChar Str, PAnsiChar SubStr);
PWideChar AnsiStrPos(PWideChar Str, PWideChar SubStr);

Call AnsiStrPos to locate the first occurrence of SubStr in Str. If SubStr does not occur in Str, AnsiStrPos returns nil (Delphi) or NULL (C++). 

Unlike the StrPos function, AnsiStrPos works with multi-byte characters sets (MBCS). 


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