Listbox Search. API vs. Vb.net Built-in

[vblearner1]

I have found two ways to search a listbox for a string.

First way is to use api:

Option Explicit 
Private Declare Function SendMessage Lib "User32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Integer, ByVal wParam As Integer, lParam As Any) As Long 
 
'Searchs a listbox for a matching string. Returns the listindex of the matching item. 
 
Function ListboxFindString(strSearchString As String, lHwndListbox As Long) As Long 
    Const LB_FINDSTRING = &H18F 
    ListboxFindString = SendMessage(lHwndListbox , LB_FINDSTRING, -1, ByVal strSearchString) 
End Function

and the second, the vb.net built-in function:

Dim i As Integer = ListBox1.FindString("String To Find")

Even tho the second one is much smaller, which one from those is the fastest? Anyone Know?