最近看到很多朋友在讨论如何锁住光驱的问题,但是没有一个结果。
趁着周末闲，写出代码和大家一起分享。
新建一个工程，在窗体上加入两个按钮，粘贴以下程序，看看效果怎么样？^_^
Option Explicit
Private Const GENERIC_READ As Long = &H80000000
Private Const FILE_SHARE_READ As Long = &H1
Private Const FILE_SHARE_WRITE As Long = &H2
Private Const OPEN_EXISTING As Long = 3
Private Const IOCTL_STORAGE_MEDIA_REMOVAL As Long = &H2D4804
Private Type PREVENT_MEDIA_REMOVAL
PreventMediaRemoval As Byte
End Type
Private Declare Function DeviceIoControl Lib "kernel32" (ByVal hDevice As Long, ByVal dwIoControlCode As Long, lpInBuffer As Any, ByVal nInBufferSize As Long, lpOutBuffer As Any, ByVal nOutBufferSize As Long, lpBytesReturned As Long, lpOverlapped As Any) As Long
Private Declare Function CreateFile Lib "kernel32" Alias "CreateFileA" (ByVal lpFileName As String, ByVal dwDesiredAccess As Long, ByVal dwShareMode As Long, lpSecurityAttributes As Any, ByVal dwCreationDisposition As Long, ByVal dwFlagsAndAttributes As Long, ByVal hTemplateFile As Long) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Public Function LockCDROM(szDrive As String, IsLock As Boolean) As Boolean
On Error GoTo Err
Dim hDevice As Long
Dim PMR As PREVENT_MEDIA_REMOVAL
Dim bytesReturned As Long
Dim Success As Long
hDevice = CreateFile("//./" & szDrive, GENERIC_READ, FILE_SHARE_READ Or FILE_SHARE_WRITE, ByVal 0&, OPEN_EXISTING, 0&, 0&)
PMR.PreventMediaRemoval = CByte(Abs(IsLock))
Success = DeviceIoControl(hDevice, IOCTL_STORAGE_MEDIA_REMOVAL, PMR, Len(PMR), ByVal 0&, 0&, bytesReturned, ByVal 0&)
CloseHandle hDevice
LockCDROM = True
Exit Function
Err:
LockCDROM = False
End Function
Private Sub Command1_Click()
Dim ret As Boolean
ret = LockCDROM("H:", True) '我的光驱盘符是H:
If ret Then
MsgBox "锁定成功", vbInformation, "提示"
Else
MsgBox "锁定失败", vbInformation, "提示"
End If
End Sub
Private Sub Command2_Click()
Dim ret As Boolean
ret = LockCDROM("H:", False)
If ret Then
MsgBox "解除锁定成功", vbInformation, "提示"
Else
MsgBox "解除锁定失败", vbInformation, "提示"
End If
End Sub