Prevent combobox control from droping down?

Hi
does anyone here have any idea on how to prevent the combobox to dropdown when the user click on the combobox button?

i tried to use the following code but it does not seems to do what i want:

Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

Private Sub MultiComboBox_DropDown(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.DropDown
Const CB_SHOWDROPDOWN = &H14F


SendMessage(combobox.Handle.ToInt32, CB_SHOWDROPDOWN, True, 0)

End Sub

Thanks

First , all longs to integers . Second , False lParam . Takes nothing . Try this :

VB Code:

Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Integer, ByVal wMsg As 
Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer
Const CB_SHOWDROPDOWN = &H14F
 
 Private Sub ComboBox1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox1.Click
 
SendMessage(ComboBox1.Handle.ToInt32, CB_SHOWDROPDOWN, False, 0)
 
End Sub

Why not just use a textbox? :(

why not set it's style to ComboBoxStyle.Simple ?

i am trying to replace the dropdown of the combobox with my own listview, so that i can have a multicolumn combobox