Locates a substring within a text buffer.
function SearchBuf(Buf: PAnsiChar; BufLen: Integer; SelStart: Integer; SelLength: Integer; SearchString: AnsiString; Options: TStringSearchOptions = [soDown]): PAnsiChar; overload; function SearchBuf(Buf: PWideChar; BufLen: Integer; SelStart: Integer; SelLength: Integer; SearchString: UnicodeString; Options: TStringSearchOptions = [soDown]): PWideChar; overload;
PAnsiChar SearchBuf(PAnsiChar Buf, int BufLen, int SelStart, int SelLength, AnsiString SearchString, TStringSearchOptions Options = [soDown]); PWideChar SearchBuf(PWideChar Buf, int BufLen, int SelStart, int SelLength, UnicodeString SearchString, TStringSearchOptions Options = [soDown]);
Call SearchBuf to search for a specified search string within a text buffer.
Buf is the text buffer to search.
BufLen is the length, in bytes, of Buf.
SelStart is the first character of the search when Options indicates a backward search (does not include soDown). The first character in Buf has position 0.
SelLength is the number of characters after SelStart that the search begins when Options indicates a forward search (includes soDown).
SearchString is the string to find in Buf.
Options determines whether the search runs forward (soDown) or backward from SelStart or SelStart+SelLength, whether the search is case sensitive (soMatchCase), and whether the matching string must be a whole word (soWholeWord).
If SearchBuf finds a match, it returns a pointer to the first character of the matching string in Buf. If it does not find a match, SearchBuf returns nil (Delphi) or NULL (C++).
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