Library code snippets
Drop Combo
By James Crowley, published on 14 Jul 2001
James first started this website when learning Visual Basic back in 1999 whilst studying his GCSEs. The site grew steadily over the years while being run as a hobby - to a regular monthly audience ...
James first started this website when learning Visual Basic back in 1999 whilst studying his GCSEs. The site grew steadily over the years while being run as a hobby - to a regular monthly audience ...
This code uses the SendMessage API to drop a combo box. Simply add a combo box called cboCombo, and a button named cmdDrop. Note that if you want to close the combo, simply call the SendMessage API using the CB_SHOWDROPDOWN with False instead of True.
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA"
(ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As
Long
Private Const CB_SHOWDROPDOWN = &H14F 'WM_USER + 14
Private Sub cmdDrop_Click()
SendMessage cboDrop.hwnd, CB_SHOWDROPDOWN, True, 0
End Sub
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Can anyone tell me how to automatically drop a datacombo upon get focus? Do I need to use API calls, as well?
this code does not works fine with VB.Net the message is not passed to the control..Can any one help??
SendMessage cbocombo.hwnd, CB_SHOWDROPDOWN, True, 0
it should look like this
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