Here is little snippet I put together for a project that will give you Auto Complete feature in your Project. Simply Place a Combo Box named cmbInput and add a reference to "Microsoft Scripting Runtime".

Note that I only used FSO to load some sample(I am loading all the folder name from C:\program files) item to the combo box, you can add any item you wish.

Finally, i am looping through all Item to find the match, if I use API it might be faster. I will see if I can speed it up in future when I get a chance.

Enjoy

Visual Basic 4 / 5 / 6 Syntax (Toggle Plain Text)

      Option Explicit
 
      Private Sub cmbInput_KeyUp(KeyCode As Integer, Shift As Integer)
          AutoSel cmbInput, KeyCode
      End Sub
 
      Private Sub Form_Load()
 
          Dim FolderPath As String
          FolderPath = "C:\Program Files"
 
          Dim Folder
          Dim File
 
          Dim FSO As New Scripting.FileSystemObject
 
          Set Folder = FSO.GetFolder(FolderPath)
 
          Dim f
 
 
          For Each f In Folder.SubFolders
              cmbInput.AddItem f.Name
          Next
 
      End Sub
 
      Function AutoSel(Cmb As ComboBox, KeyCode As Integer)
 
          Debug.Print KeyCode
 
          If KeyCode = vbEnter Then Exit Function
          If KeyCode = 8 Then Exit Function    'Backspace
          If KeyCode = 37 Then Exit Function  'left key
          If KeyCode = 38 Then Exit Function 'up arrow key
          If KeyCode = 39 Then Exit Function  'right key
          If KeyCode = 40 Then Exit Function  'down arrow key
          If KeyCode = 46 Then Exit Function  'delete key
          If KeyCode = 33 Then Exit Function  'page up key
          If KeyCode = 34 Then Exit Function  'page down key
          If KeyCode = 35 Then Exit Function  'end key
          If KeyCode = 36 Then Exit Function  'home key
 
 
          Dim Text As String
          Text = Cmb.Text
 
          Dim i As Long
          Dim Temp As String
 
          For i = 0 To Cmb.ListCount
              Temp = Left(Cmb.List(i), Len(Text))
              If LCase(Temp) = LCase(Text) Then
                  Cmb.Text = Cmb.List(i)
                  Cmb.ListIndex = i
                  Cmb.SelStart = Len(Text)
                  Cmb.SelLength = Len(Cmb.List(i))
                  'Cmb.SetFocus
              End If
          Next
 
      End Function

Option Explicit Private Sub cmbInput_KeyUp(KeyCode As Integer, Shift As Integer) AutoSel cmbInput, KeyCode End Sub Private Sub Form_Load() Dim FolderPath As String FolderPath = "C:\Program Files" Dim Folder Dim File Dim FSO As New Scripting.FileSystemObject Set Folder = FSO.GetFolder(FolderPath) Dim f For Each f In Folder.SubFolders cmbInput.AddItem f.Name Next End Sub Function AutoSel(Cmb As ComboBox, KeyCode As Integer) Debug.Print KeyCode If KeyCode = vbEnter Then Exit Function If KeyCode = 8 Then Exit Function 'Backspace If KeyCode = 37 Then Exit Function 'left key If KeyCode = 38 Then Exit Function 'up arrow key If KeyCode = 39 Then Exit Function 'right key If KeyCode = 40 Then Exit Function 'down arrow key If KeyCode = 46 Then Exit Function 'delete key If KeyCode = 33 Then Exit Function 'page up key If KeyCode = 34 Then Exit Function 'page down key If KeyCode = 35 Then Exit Function 'end key If KeyCode = 36 Then Exit Function 'home key Dim Text As String Text = Cmb.Text Dim i As Long Dim Temp As String For i = 0 To Cmb.ListCount Temp = Left(Cmb.List(i), Len(Text)) If LCase(Temp) = LCase(Text) Then Cmb.Text = Cmb.List(i) Cmb.ListIndex = i Cmb.SelStart = Len(Text) Cmb.SelLength = Len(Cmb.List(i)) 'Cmb.SetFocus End If Next End Function