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 LB_GETITEMHEIGHT = &H1A1
Private Sub Command2_Click()
Dim ITEMHEIGHT As Integer
ITEMHEIGHT = SendMessage(List1.hwnd, LB_GETITEMHEIGHT, 0, 0)
MsgBox ITEMHEIGHT
End Sub
Private Sub Form_Load()
For i = 1 To 10
List1.AddItem i
Next
End Sub