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 Declare Function GetClientRect Lib "user32" (ByVal hwnd As Long, _
lpRect As RECT) As Long
Const LB_GETITEMHEIGHT = &H1A1
Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type
Function ListBoxVisibleItems(lb As ListBox) As Long
Dim lpRect As RECT, itemHeight As Long
GetClientRect lb.hwnd, lpRect
itemHeight = SendMessage(lb.hwnd, LB_GETITEMHEIGHT, 0, ByVal 0&)
ListBoxVisibleItems = (lpRect.Bottom - lpRect.Top) \ itemHeight
End Function |