uses ShellAPI;

//打开 C 盘
procedure TForm1.Button1Click(Sender: TObject);
begin
ShellExecute(Handle, 'open', 'Explorer.exe', 'C:\', nil, SW_SHOWNORMAL);
end;

//打开 我的电脑
procedure TForm1.Button2Click(Sender: TObject);
begin
ShellExecute(Handle, 'open', 'Explorer.exe',
'::{20D04FE0-3AEA-1069-A2D8-08002B30309D}', nil, SW_SHOWNORMAL);
end;

//打开 资源管理器
procedure TForm1.Button3Click(Sender: TObject);
begin
ShellExecute(Handle, 'open', 'Explorer.exe',
'/e,::{20D04FE0-3AEA-1069-A2D8-08002B30309D}', nil, SW_SHOWNORMAL);
end;