WinAPI字符及字符串函數(shù)(11):lstrcpyn-復制字符串,同時指定要復制的長度

unit Unit1;
    interface
    uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls;
    type
    TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
    end;
    var
    Form1: TForm1;
    implementation
    {$R *.dfm}
    procedure TForm1.Button1Click(Sender: TObject);
    var
    p: PChar;
    buf: array[0..255] of Char;
    begin
    p := 'Delphi';
    lstrcpyn(buf, p, 3+1);
    ShowMessage(buf); {Del}
    lstrcpyn(buf, p, -1);
    ShowMessage(buf); {Delphi}
    end;
    end