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combo boxes and the keyboard

Posted on 1998-06-29
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Last Modified: 2010-05-03
Is there a way I can know if the combo box is pulled down or a selection is made from the keyboard or the mouse?
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Question by:wariar
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5 Comments
 
LVL 4

Expert Comment

by:yowkee
ID: 1464523
wariar,

  You could use SendMessage to get these info from combo box. To check whether it's pull down, send message CB_GETDROPPEDSTATE. To check any item being selected, send message CB_GETCURSEL.

  For example:

----
  ' You may change the code to the place you want to do the   ' checking

Const CB_GETDROPPEDSTATE = &H157
Const CB_GETCURSEL = &H147
Const CB_ERR = (-1)
Private Declare Function SendMessageLong Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

Private Sub Command1_Click()
    Dim lDrop As Long
    lDrop = SendMessageLong(Combo1.hwnd, CB_GETDROPPEDSTATE, 0,_                             0)
    If lDrop Then
        MsgBox "Drop Down!"
    Else
        MsgBox "Not drop down"
    End If
End Sub

Private Sub Command2_Click()
    Dim lSel As Long
    lSel = SendMessageLong(Combo1.hwnd, CB_GETCURSEL, 0, 0)
    If lSel <> CB_ERR Then
        MsgBox "Selected: " + Combo1.List(lSel)
    Else
        MsgBox "No item being selected!"
    End If
End Sub

Private Sub Form_Load()
    Combo1.AddItem "A"
    Combo1.AddItem "B"
    Combo1.AddItem "C"
    Combo1.AddItem "D"
    Combo1.AddItem "E"
End Sub

-----

Regards.
0
 

Author Comment

by:wariar
ID: 1464524
Thanks yowkee !!!
I guess I should have been more specific with my question.

How do I know if I've used the KEYBOARD or the MOUSE to either pull down the combo box or select an item from the list?
0
 
LVL 4

Expert Comment

by:yowkee
ID: 1464525
wariar,

  In this case, you could just use a variable to check about it.
Declare a variable iCheck in Form module. Set iCheck to 1 in combo1 mousedown event, set icheck to 2 in combo keydown event.

  Then you could just check the variable to determine user has used mouse or keyboard to select an item and never select (could combine with above selection checking).

  Regards.
0
 

Author Comment

by:wariar
ID: 1464526
yowkee,

Thanks again. I tried what you suggested but with a boolean variable. It seems to work. I appreciate the quick response.

wariar.
0
 
LVL 4

Accepted Solution

by:
yowkee earned 150 total points
ID: 1464527
wariar,

  I assume I could propose it as answer. :)

----
 In this case, you could just use a variable to check about it.
Declare a variable iCheck in Form module. Set iCheck to 1 in combo1 mousedown event, set icheck to 2 in combo
keydown event.
  Then you could just check the variable to determine user has used mouse or keyboard to select an item and never
select (could combine with above selection checking).
----

  Regards.
0

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