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Identifying floppy drive and CD ROM drive in drive list box

Posted on 2002-05-08
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Last Modified: 2010-05-02
I'm using drivelist box and dir list box control in my VB form.In the drivelist box on change i give the selected path to dirlistbox like
 dirFolder.path = Drive1.Drive

But when the user selects the floppy drive or CD ROM drive it crashes saying device is not ready , for diff. machine the CD ROM drive chanes how can i identify and stop showing teh floppy and CD ROM drives here , in my m/c "f:" is CD drive but for diff m/c it may be "d:" or anything how can i trach drive1.drive only returns "f:" or equivalenta dn it crashes then. How can i idntify and stop showing these drives
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Question by:anamika1977
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8 Comments
 
LVL 22

Expert Comment

by:Mohammed Nasman
ID: 6998210
Hello

 use error handling in ur code

Private Sub Drive1_Change()
  On Error GoTo ErrDrv
  Dir1.Path = Drive1.Drive
ErrDrv:
    Drive1.Drive = Dir1.Path
End Sub

Best regards
Mohammed Nasman
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LVL 1

Expert Comment

by:killer5
ID: 6998337
Public Declare Function GetDriveType Lib "kernel32.dll" Alias "GetDriveTypeA" (ByVal nDrive As String) As Long
Public Const DRIVE_CDROM = 5
Public Const DRIVE_FIXED = 3
Public Const DRIVE_RAMDISK = 6
Public Const DRIVE_REMOTE = 4
Public Const DRIVE_REMOVABLE = 2

sample use
If GetDriveType(Drive1.Drive) <> DRIVE_CDROM Then
    msgbox "This is not a CD ROM Drive"
end if
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LVL 1

Expert Comment

by:killer5
ID: 6998342
you can also use this code snippet for handling floppy drives with no diskettes in it.

Private Sub Drive1_Change()
On Error GoTo ErrHandler
   Dir1.Path = Drive1.Drive
   LastDrive = Drive1.Drive
Exit Sub
ErrHandler:
   WarnUser ("Sorry, drive is not ready.")
   Drive1.Drive = LastDrive
End Sub
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Accepted Solution

by:
killer5 earned 50 total points
ID: 6998343
Public Declare Function GetDriveType Lib "kernel32.dll" Alias "GetDriveTypeA" (ByVal nDrive As String) As Long
Public Const DRIVE_CDROM = 5
Public Const DRIVE_FIXED = 3
Public Const DRIVE_RAMDISK = 6
Public Const DRIVE_REMOTE = 4
Public Const DRIVE_REMOVABLE = 2

sample use
If GetDriveType(Drive1.Drive) <> DRIVE_CDROM Then
    msgbox "This is not a CD ROM Drive"
end if
0
 
LVL 1

Expert Comment

by:killer5
ID: 6998346
you can also use this code snippet for handling floppy drives with no diskettes in it.

Use LastDrive variable to store the current drive. it is recommended that you initialize it to C or any valid drive upon form load

Private Sub Drive1_Change()
On Error GoTo ErrHandler
   Dir1.Path = Drive1.Drive
   LastDrive = Drive1.Drive
Exit Sub
ErrHandler:
   WarnUser ("Sorry, drive is not ready.")
   Drive1.Drive = LastDrive
End Sub
0
 
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Expert Comment

by:killer5
ID: 6998348
sorry for positing several comments... i'm having trouble with my browser
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Expert Comment

by:Moondancer
ID: 7017773
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Expert Comment

by:Moondancer
ID: 7024623
Thanks for finalizing this.
Moondancer - EE Moderator
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