Here is all that you need to know to create a virtual CD program. First create a module and insert the following code.
Public Type BrowseInfo
lngHwnd As Long
pIDLRoot As Long
pszDisplayName As Long
lpszTitle As Long
ulFlags As Long
lpfnCallback As Long
lParam As Long
iImage As Long
End Type
Public Const BIF_RETURNONLYFSDIRS = 1
Public Const MAX_PATH = 260
Declare Sub CoTaskMemFree Lib "ole32.dll" _
(ByVal hMem As Long)
Declare Function lstrcat Lib "kernel32" _
Alias "lstrcatA" (ByVal lpString1 As String, _
ByVal lpString2 As String) As Long
Declare Function SHBrowseForFolder Lib "shell32" _
(lpbi As BrowseInfo) As Long
Declare Function SHGetPathFromIDList Lib "shell32" _
(ByVal pidList As Long, ByVal lpBuffer As String) As Long
Declare Function GetDriveType Lib "kernel32" Alias "GetDriveTypeA" (ByVal nDrive
As String) As Long
Global Drives(1 To 26) As String
Public Function BrowseForFolder(ByVal lngHwnd As Long, ByVal strPrompt As String)
As String
On Error GoTo ehBrowseForFolder 'Trap for errors
Dim intNull As Integer
Dim lngIDList As Long, lngResult As Long
Dim strPath As String
Dim udtBI As BrowseInfo
'Set API properties (housed in a UDT)
With udtBI
.lngHwnd = lngHwnd
.lpszTitle = lstrcat(strPrompt, "")
.ulFlags = BIF_RETURNONLYFSDIRS
End With
'Display the browse folder...
lngIDList = SHBrowseForFolder(udtBI)
If lngIDList <> 0 Then
'Create string of nulls so it will fill in with the
path
strPath = String(MAX_PATH, 0)
'Retrieves the path selected, places in the null
'character filled string
lngResult = SHGetPathFromIDList(lngIDList, strPath)
'Frees memory
Call CoTaskMemFree(lngIDList)
'Find the first instance of a null character,
'so we can get just the path
intNull = InStr(strPath, vbNullChar)
'Greater than 0 means the path exists...
If intNull > 0 Then
'Set the value
strPath = Left(strPath, intNull - 1)
End If
End If
'Return the path name
BrowseForFolder = strPath
Exit Function 'Abort
ehBrowseForFolder:
'Return no value
BrowseForFolder = Empty
End Function
Sub SetDrives()
Drives(1) = "a:"
Drives(2) = "b:"
Drives(3) = "c:"
Drives(4) = "d:"
Drives(5) = "e:"
Drives(6) = "f:"
Drives(7) = "g:"
Drives(8) = "h:"
Drives(9) = "i:"
Drives(10) = "j:"
Drives(11) = "k:"
Drives(12) = "l:"
Drives(13) = "m:"
Drives(14) = "n:"
Drives(15) = "o:"
Drives(16) = "p:"
Drives(17) = "q:"
Drives(18) = "r:"
Drives(19) = "s:"
Drives(20) = "t:"
Drives(21) = "u:"
Drives(22) = "v:"
Drives(23) = "w:"
Drives(24) = "x:"
Drives(25) = "y:"
Drives(26) = "z:"
End Sub
'end module code
Then, add the following code to a form.
Sub MountVirtualDrive(strVirtualDrive, strPhysicPath)
Shell "subst.exe " & strVirtualDrive & Chr(32) & strPhysicPath, vbHide
End Sub
Sub UnMountVirtualDrive(strVirtualDrive)
Shell "subst.exe " & strVirtualDrive & " /d", vbHide
End Sub
'end form code
Now all that you have to do to add a virtual drive is call MountVirtualDrive("g:","g:\my
mounted folder"). To remove a virtual drive just do UnMountVirtualDrive("f:")
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