I'm using:

Public Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" (ByVal hWnd1 As Long, ByVal hWnd2 As Long, ByVal lpsz1 As String, ByVal lpsz2 As String) As Long


could someone explain how i use this function and the values i need for this function:

hWnd1
hWnd2
lpsz1
lpsz2


thanks! i appreciate it!