unit1.pas

Delphi7应用编程150例附书源码.rar

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    ListView1: TListView;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
    ShowMessage(GetEnvironmentVariable('temp'));
end;

procedure TForm1.FormCreate(Sender: TObject);
var
    EnvPtr,savePtr:Pchar;
    s:string;
    TempListItem:TListItem;
    TempListColumn:TListColumn;
    EnvString:String;
begin
    TempListColumn:=self.ListView1.Columns.Add;
    TempListColumn.Caption:='环境变量';
    TempListColumn.AutoSize:=true;
    TempListColumn:=self.ListView1.Columns.Add;
    TempListColumn.Caption:='内容';
    Envptr:=GetEnvironmentStrings;
    savePtr:=EnvPtr;
    repeat
        TempListItem:=self.ListView1.Items.Add;
        EnvString:=StrPas(EnvPtr);
        TempListItem.Caption:=Copy(EnvString,0,Pos('=',EnvString)-1);
        TempListItem.SubItems.Add(Copy(EnvString,Pos('=',EnvString)+1,Length(EnvString)-Pos('=',EnvString)));
        inc(EnvPtr,strlen(EnvPtr)+1);
    until EnvPtr^=#0;
    FreeEnvironmentStrings(saveptr);
end;

end.