在VB6中实现禁用和启用设备管理器中的音频设备并不直接支持,需要使用Windows API调用来完成。你可以利用设备管理器的接口进行操作,比如通过 SetupDi
系列API函数和 CM
系列API函数实现。
以下是一个示例代码,用于禁用和启用音频设备:
- 声明API函数和常量:
' Module: Module1
Option Explicit
Private Const DIGCF_PRESENT = &H2
Private Const DIGCF_DEVICEINTERFACE = &H10
Private Const DICS_DISABLE = &H1
Private Const DICS_ENABLE = &H2
Private Const DIREG_DEV = &H1
Private Const DICS_FLAG_GLOBAL = &H1
Private Const DICS_FLAG_CONFIGSPECIFIC = &H2
Private Type SP_DEVINFO_DATA
cbSize As Long
ClassGuid As GUID
DevInst As Long
Reserved As Long
End Type
Private Type GUID
Data1 As Long
Data2 As Integer
Data3 As Integer
Data4(7) As Byte
End Type
Private Declare Function SetupDiGetClassDevs Lib "setupapi.dll" Alias "SetupDiGetClassDevsA" (ByRef ClassGuid As GUID, ByVal Enumerator As Long, ByVal hwndParent As Long, ByVal Flags As Long) As Long
Private Declare Function SetupDiEnumDeviceInfo Lib "setupapi.dll" (ByVal DeviceInfoSet As Long, ByVal MemberIndex As Long, ByRef DeviceInfoData As SP_DEVINFO_DATA) As Long
Private Declare Function CM_Disable_DevNode Lib "cfgmgr32.dll" (ByVal dnDevInst As Long, ByVal ulFlags As Long) As Long
Private Declare Function CM_Enable_DevNode Lib "cfgmgr32.dll" (ByVal dnDevInst As Long, ByVal ulFlags As Long) As Long
Private Declare Function SetupDiDestroyDeviceInfoList Lib "setupapi.dll" (ByVal DeviceInfoSet As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (ByRef Destination As Any, ByRef Source As Any, ByVal Length As Long)
' GUID of audio devices class
Private Const AUDIO_CLASS_GUID As String = "{4d36e96c-e325-11ce-bfc1-08002be10318}"
- 转换GUID字符串到GUID类型:
Private Function StringToGUID(guidString As String) As GUID
Dim p(0 To 15) As Byte
Dim guid As GUID
Dim i As Long
p(0) = CByte("&H" & Mid$(guidString, 2, 2))
p(1) = CByte("&H" & Mid$(guidString, 4, 2))
p(2) = CByte("&H" & Mid$(guidString, 6, 2))
p(3) = CByte("&H" & Mid$(guidString, 8, 2))
p(4) = CByte("&H" & Mid$(guidString, 11, 2))
p(5) = CByte("&H" & Mid$(guidString, 13, 2))
p(6) = CByte("&H" & Mid$(guidString, 16, 2))
p(7) = CByte("&H" & Mid$(guidString, 18, 2))
For i = 0 To 7
p(8 + i) = CByte("&H" & Mid$(guidString, 21 + 2 * i, 2))
Next i
CopyMemory guid, p(0), 16
StringToGUID = guid
End Function
- 设备禁用和启用函数:
Private Function EnableDevice(enable As Boolean) As Boolean
Dim hDevInfo As Long
Dim DevInfoData As SP_DEVINFO_DATA
Dim guid As GUID
Dim memberIndex As Long
Dim success As Long
guid = StringToGUID(AUDIO_CLASS_GUID)
hDevInfo = SetupDiGetClassDevs(guid, 0, 0, DIGCF_PRESENT Or DIGCF_DEVICEINTERFACE)
If hDevInfo = 0 Then
MsgBox "Error getting device information set."
Exit Function
End If
DevInfoData.cbSize = Len(DevInfoData)
memberIndex = 0
Do While SetupDiEnumDeviceInfo(hDevInfo, memberIndex, DevInfoData)
If enable Then
success = CM_Enable_DevNode(DevInfoData.DevInst, 0)
Else
success = CM_Disable_DevNode(DevInfoData.DevInst, 0)
End If
If success <> 0 Then
MsgBox "Error " & IIf(enable, "enabling", "disabling") & " device."
Else
MsgBox "Device " & IIf(enable, "enabled", "disabled") & " successfully."
End If
memberIndex = memberIndex + 1
Loop
SetupDiDestroyDeviceInfoList hDevInfo
End Function
- 调用禁用和启用函数:
Private Sub DisableAudioDevice()
Call EnableDevice(False)
End Sub
Private Sub EnableAudioDevice()
Call EnableDevice(True)
End Sub
注意:这些操作需要管理员权限,并且直接操作设备管理器中的设备可能会影响系统稳定性,请在测试环境中使用,并确保有备份计划。
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