Write to a floppy disk using native visual basic (calling kernel32)

write_floppy.vb

'Ripped from a post by The Dragon (Alexander) 2003

'This code is free to use but pls contact me when you use or like it
'This only works under NT/2k/XP (all NT based OS's I think)
'u can contact me for support

'developer@dewieden.org

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
Private Declare Function SetFilePointer Lib "kernel32" (ByVal hFile As Long, ByVal lDistanceToMove As Long, lpDistanceToMoveHigh As Long, ByVal dwMoveMethod As Long) As Long
Private Declare Function ReadFile Lib "kernel32" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToRead As Long, lpNumberOfBytesRead As Long, ByVal lpOverlapped As Long) As Long
Private Declare Function WriteFile Lib "kernel32" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToWrite As Long, lpNumberOfBytesWritten As Long, lpOverlapped As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)

Private Const INVALID_HANDLE_VALUE = -1
Private Const OPEN_EXISTING = 3
Private Const GENERIC_READ = &H80000000
Private Const GENERIC_WRITE = &H40000000
Private Const FILE_SHARE_READ = &H1
Private Const FILE_SHARE_WRITE = &H2
Private Const FILE_CURRENT = 1
    
Private Sub Command1_Click()
    Dim hDevice As Long
    Dim BytesPerSector As Long
    iOffset = 0
    cBytes = 512
    BytesPerSector = 512
    
    Dim abBuff() As Byte
    Dim abResult() As Byte
    Dim nSectors As Long
    Dim nWritten As Long
    Dim writer As String
    nSectors = Int((iOffset + cBytes - 1) / BytesPerSector) + 1
    hDevice = CreateFile("\\.\A:", GENERIC_WRITE, FILE_SHARE_READ Or FILE_SHARE_WRITE, ByVal 0&, OPEN_EXISTING, 0, 0)
    For i = 0 To (2880 - 1)
        DoEvents
        If hDevice = INVALID_HANDLE_VALUE Then Exit Sub
        Open "d:\floppy.bin" For Binary Access Read As #1
        writer = Space(512)
        Get #1, i * 512 + 1, writer
        abResult = StrConv(writer, vbFromUnicode)
        Close #1
        ReDim abBuff(nSectors * BytesPerSector - 1)
        CopyMemory abBuff(iOffset), abResult(0), Len(abResult(0))
            
        Call SetFilePointer(hDevice, i * BytesPerSector, 0, FILE_BEGIN)
        Call WriteFile(hDevice, abResult(0), BytesPerSector, nWritten, ByVal 0&)
    Next i
    CloseHandle hDevice
End Sub