FindWindowEx

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!

hWnd1 = What Parent to search
hWnd2 = What Child to start at
lpsz1 = ClassName
lpsz2 = WindowName

This next example will find Calculator.

Code:

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Private 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

Private Sub Command1_Click()

    Dim hApp As Long
 
    hApp = FindWindowEx(0, 0, "SciCalc", "Calculator")
    If hApp <> 0 Then MsgBox "Calculator is open"

End Sub

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