For the experts...( WOT NO MOUSE EVENTS !!)

Anybody aware of a way to drag text from the text field of a combo box to a standard text box, considering the combobox has no mousedown event to signify the start of the operation ?

The easy solution would be to code the combo's click event to pop the desired entry over to the textbox. You can simulate mouse events in a combo box, but it requires subclassing and a whole lotta code. :)

Use the mouse_event API ?

Here is some code by Serge to simulate the mouse_down event for a combo box.

VB Code:

'module code
Public g_lngOldWinProc As Long 
 
Private Type POINTAPI 
x As Long 
y As Long 
End Type 
 
Private Declare Function ScreenToClient Lib "user32" (ByVal hwnd As Long, lpPoint As POINTAPI) As Long 
Private Declare Function GetCursorPos Lib "user32" (lpPoint As POINTAPI) As Long 
 
Public Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hwnd As Long, ByVal msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long 
Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long 
Public Const GWL_STYLE = (-16) 
Public Const GWL_WNDPROC = (-4) 
Public Const WM_MBUTTONDOWN = &H207 
Public Const WM_LBUTTONDOWN = &H201 
Public m_ctlCombo As ComboBox 
 
Public m_intOldX As Integer 
Public m_intOldY As Integer 
 
Public Function NewWindowProc(ByVal hwnd As Long, ByVal msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
 
    Dim strMsg As String
    Dim lngRet As Long
    Dim pt As POINTAPI      
 
    Select Case msg
 
        Case WM_LBUTTONDOWN
 
            'memorize the position of X and Y
 
            Call GetCursorPos(pt)
 
            Call ScreenToClient(Form1.hwnd, pt)            
 
            m_intOldX = pt.x * Screen.TwipsPerPixelX
 
            m_intOldY = pt.y * Screen.TwipsPerPixelY       
 
            m_ctlCombo.Drag vbBeginDrag       
 
    End Select
 
    NewWindowProc = CallWindowProc(g_lngOldWinProc, hwnd, msg, wParam, lParam)
 
End Function
 
'Form Code 
 
Private Sub Form_DragDrop(Source As Control, x As Single, y As Single)
    If Source.Name = "Combo1" Then
        Combo1.Top = Combo1.Top + (y - m_intOldY)
        Combo1.Left = Combo1.Left + (x - m_intOldX)
    End If
End Sub
 
 
Private Sub Form_Load()
    Set m_ctlCombo = Combo1
    g_lngOldWinProc = SetWindowLong(Combo1.hwnd, GWL_WNDPROC, AddressOf NewWindowProc)
End Sub
 
Private Sub Form_Unload(Cancel As Integer)
    Call SetWindowLong(Combo1.hwnd, GWL_WNDPROC, g_lngOldWinProc)
End Sub
'Simulate A MouseDown Event With A Combo Box
'Submitted By Serge 10/22/2001

Handy code

Heh true :)