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Private Declare Function mciSendString Lib "winmm" Alias "mciSendStringA" (ByVal lpstrCommand As String, ByVal lpstrReturnString As String, ByVal uReturnLength As Long, ByVal hwndCallback As Long) As Long

Private Declare Function GetLogicalDriveStrings Lib "kernel32" Alias "GetLogicalDriveStringsA" (ByVal nBufferLength As Long, ByVal lpBuffer As String) As Long
Private Declare Function GetDriveType Lib "kernel32" Alias "GetDriveTypeA" (ByVal nDrive As String) As Long
Private Declare Function GetDiskFreeSpace Lib "kernel32" Alias "GetDiskFreeSpaceA" (ByVal lpRootPathName As String, lpSectorsPerCluster As Long, lpBytesPerSector As Long, lpNumberOfFreeClusters As Long, lpTtoalNumberOfClusters As Long) As Long

Private Declare Function GetVersion Lib "kernel32" () 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 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 CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long

Private Const INVALID_HANDLE_VALUE = -1
Private Const OPEN_EXISTING = 3
Private Const FILE_FLAG_DELETE_ON_CLOSE = 67108864
Private Const GENERIC_READ = &H80000000
Private Const GENERIC_WRITE = &H40000000
Private Const IOCTL_STORAGE_EJECT_MEDIA = &H2D4808
Private Const IOCTL_STORAGE_LOAD_MEDIA = &H2D480C
Private Const VWIN32_DIOC_DOS_IOCTL = 1

Private Type DIOC_REGISTERS
   reg_EBX As Long
   reg_EDX As Long
   reg_ECX As Long
   reg_EAX As Long
   reg_EDI As Long
   reg_ESI As Long
   reg_Flags As Long
End Type

Private Sub CD_Eject(ByVal Drive As String)
Dim hDrive As Long, DummyReturnedBytes As Long
Dim EjectDrive As String
Dim RawStuff As DIOC_REGISTERS

     Drive = UCase(Left$(Drive & ":", 2))
     If GetVersion >= 0 Then ' Запущена Windows NT/2000
         hDrive = CreateFile("\\.\" & Drive, GENERIC_READ Or GENERIC_WRITE, 0, ByVal 0, OPEN_EXISTING, 0, 0)
         If hDrive <> INVALID_HANDLE_VALUE Then
             DeviceIoControl hDrive, IOCTL_STORAGE_EJECT_MEDIA, 0, 0, 0, 0, DummyReturnedBytes, ByVal 0
             CloseHandle hDrive
         End If
     Else 'Запущена Windows 9x/Me
         hDrive = CreateFile("\\.\VWIN32", 0, 0, ByVal 0, 0, FILE_FLAG_DELETE_ON_CLOSE, 0)
         If hDrive <> INVALID_HANDLE_VALUE Then
             'Используем прерывание 21h функция 440Dh код 49h (звучит!)
             RawStuff.reg_EAX = &H440D
             RawStuff.reg_EBX = Asc(Drive) - Asc("A") + 1 ' Номер диска
             RawStuff.reg_ECX = &H49 Or &H800

             DeviceIoControl hDrive, VWIN32_DIOC_DOS_IOCTL, RawStuff, LenB(RawStuff), RawStuff, LenB(RawStuff), DummyReturnedBytes, ByVal 0
             CloseHandle hDrive
         End If
     End If
End Sub

Private Sub Command1_Click()
CD_Eject "e" ' откроется диск E:
CD_Eject "f" ' откроется диск F:

End Sub

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