check drives.frm

I am sorry ,at first ,我上载了一个错误的文件

VERSION 5.00
Begin VB.Form MainFrm 
   Caption         =   "Check Drives"
   ClientHeight    =   1680
   ClientLeft      =   60
   ClientTop       =   420
   ClientWidth     =   2670
   LinkTopic       =   "Form1"
   ScaleHeight     =   1680
   ScaleWidth      =   2670
   StartUpPosition =   3  'Windows Default
   Begin VB.CommandButton Command2 
      Caption         =   "Check all"
      Height          =   375
      Left            =   1440
      TabIndex        =   3
      Top             =   1080
      Width           =   1095
   End
   Begin VB.CommandButton Command1 
      Caption         =   "Check Now"
      Height          =   375
      Left            =   120
      TabIndex        =   2
      Top             =   1080
      Width           =   1095
   End
   Begin VB.TextBox txtDriveName 
      Height          =   285
      Left            =   1320
      TabIndex        =   1
      Top             =   240
      Width           =   1095
   End
   Begin VB.Label Label2 
      AutoSize        =   -1  'True
      Caption         =   "(Just the letter of the Drive)"
      Height          =   195
      Left            =   360
      TabIndex        =   4
      Top             =   720
      Width           =   1905
   End
   Begin VB.Label Label1 
      AutoSize        =   -1  'True
      Caption         =   "Drive Name : "
      Height          =   195
      Left            =   120
      TabIndex        =   0
      Top             =   240
      Width           =   975
   End
End
Attribute VB_Name = "MainFrm"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False

Private Sub Command1_Click()
    CheckNow txtDriveName
End Sub

Private Sub Command2_Click()
    CheckNow "all"
End Sub