ComboBoxGetDroppedControlRect - Get the size of a ComboBox dropped rectangle

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 Type RECT
    Left As Long
    Top As Long
    Right As Long
    Bottom As Long
End Type

Const CB_GETDROPPEDCONTROLRECT = &H152

' Return the size and position of the drop-down list rectangle 
' of a ComboBox control.

Sub ComboBoxGetDroppedControlRect(cb As ComboBox, Left As Long, Top As Long, _
    Right As Long, Bottom As Long)
    Dim lpRect As RECT
    SendMessage cb.hwnd, CB_GETDROPPEDCONTROLRECT, 0, lpRect
    Left = lpRect.Left
    Top = lpRect.Top
    Right = lpRect.Right
    Bottom = lpRect.Bottom
End Sub