Yes, agree with nico.
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Smart search for combo box
What is the correct code for doing combo box smart searches in Access?
I have written VB 6.0 applications that use smart search logic for combo boxes. I have the need to use this type of logic on a form in an Access 97 database application, but the logic isn't the same. One issue is that the SendMessage call in the VB code requires the handle of the combo box, while access only has a property (hWnd) for at the form/report level, not the control level. Another issue is the difference in the way the combo list items are referenced.
Below are some pieces of my modified VB code for Access that doesn't work. It always goes to the first item in the list, based on the using the form's window handle? Any ideas on how to fix this?
Public Declare Function SendMessage Lib "user32" _
Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As _
Long, ByVal wParam As Long, ByVal lParam As Any) As Long
Global Const CB_FINDSTRING = &H14C
Private Sub cboRepNum_KeyPress(KeyAsci
Dim intIndex As Long
Dim strTemp As String
'Figure out the string prefix to search for
If cboRepNum.SelStart = 0 Then
strTemp = cboRepNum.Text & Chr(KeyAscii)
Else
strTemp = Left(cboRepNum.Text, cboRepNum.SelStart) & Chr(KeyAscii)
End If
Dim intWindowHandle As Long
intWindowHandle = Screen.ActiveForm.hwnd
intIndex = SendMessage(intWindowHandl
'-1 return code indicates failure to find the string
If intIndex <> -1 Then
'SendMessage returns the index of the first occurrence
cboRepNum.ListIndex = intIndex
'Set the text selection appropriately for the suggested match
cboRepNum.SelStart = Len(strTemp)
cboRepNum.SelLength = Len(cboRepNum.Text) - Len(strTemp)
KeyAscii = 0
End If
End Sub
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Answers
This is how you get the hWnd of a control in Access. I also agree with Nico though that Access automatically will find an item in a combobox based on what you type in in the edit control of the combobox.
'-------------------------
'Taken from Dev Ashish web site www.mvps.org/access
'
'When an Access control on a form receives the focus,
'it becomes a true window and it's possible to retrieve
'it's handle by using the GetFocus API. Note that
'because Access controls do not behave like VB controls,
'there's not a whole lot that we can do with the hWnd.
'
'Joe Kendall 8/13/2001
'-------------------------
Private Declare Function GetFocus Lib "user32" () As Long
Public Function fhWnd(ctl As Control) As Long
On Error Resume Next
ctl.SetFocus
If err Then
fhWnd = 0
Else
fhWnd = GetFocus
End If
On Error GoTo 0
End Function
Thanks!
Joe
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by: nico5038Posted on 2002-06-26 at 17:24:52ID: 7112411
Hi,
I'm not sure what you mean with the "combo box smart searche".
Normally in access the combobox already has a feature called "autoappend". This will show matches as long as they are present in the underlaying table/query.
Can you explain what you want to do "functionally" ?
Nic;o)