unit1.~pas

Delphi的函数例子

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls,StrUtils;

type
  TForm1 = class(TForm)
    Button1: TButton;
    EditControl: TEdit;
    Edit1: TEdit;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  SearchString:string;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
Buffer, P: PChar;
Size: Word;
begin
SearchString := 'co';
if (Length(SearchString) = 0) then Exit;
  Size := EditControl.GetTextLen;
if (Size = 0) then Exit;
  Buffer := StrAlloc(Size + 1);
try
  EditControl.GetTextBuf(Buffer, Size + 1);
  P := SearchBuf(Buffer, Size, EditControl.SelStart, EditControl.SelLength,
  SearchString, [soDown]);
  if P <> nil then begin
    EditControl.SelStart := P - Buffer;
    EditControl.SelLength := Length(SearchString);

  end;
  Edit1.Text := p;
finally
  StrDispose(Buffer);
end;

end;

end.