音量控制VisualBasic代码中的错误

以下是正确的 Visual Basic 代码示例，可以实现音量控制：

Private Declare Function SendMessage Lib "user32" _ Alias "SendMessageA" (ByVal hWnd As Long, _ ByVal wMsg As Long, ByVal wParam As Long, _ lParam As Any) As Long

Private Const WM_APPCOMMAND = &H319 Private Const APPCOMMAND_VOLUME_UP = &HA Private Const APPCOMMAND_VOLUME_DOWN = &H9 Private Const APPCOMMAND_VOLUME_MUTE = &H8 Private Const VK_VOLUME_MUTE = &HAD

' 增加音量 Public Sub VolumeUp() SendMessage hwnd, WM_APPCOMMAND, 0, APPCOMMAND_VOLUME_UP * &H10000 End Sub

' 减小音量 Public Sub VolumeDown() SendMessage hwnd, WM_APPCOMMAND, 0, APPCOMMAND_VOLUME_DOWN * &H10000 End Sub

' 静音 Public Sub VolumeMute() SendMessage hwnd, WM_APPCOMMAND, 0, APPCOMMAND_VOLUME_MUTE * &H10000 End Sub

请确保在代码中替换 hwnd 为要控制的窗口的句柄。如果您希望该代码能够与特定应用程序一起使用，请将 hwnd 替换为该应用程序的窗口句柄。