Delphi调用WinAPI 字符及字符串函数(11)

lstrcpyn - 复制字符串, 同时指定要复制的长度

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.