unit1.pas

Delphi实效编程百例的随书源代码 这是其中的操作系统部分

unit Unit1;

interface

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

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

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var
        // 节名称字符串
        AppName: array[0..256] of Char;
        // 键名称字符串
        KeyName: array[0..256] of Char;
        // 在键名没有找到时默认返回的字符串
        DefaultString: array[0..256] of Char;
        // 在键名找到时返回的字符串
        ReturnedString: array[0..256] of Char;
begin
        // 节名称
        AppName:='windows';
        // 键名称
        KeyName:='device';
        GetProfileString( AppName,
                  KeyName ,
                  DefaultString ,
                  ReturnedString ,
                  Sizeof( ReturnedString) );
        // 显示结果
        Edit1.Text:=ReturnedString;
end;
end.