Thread: Find Child Window

I am trying to find the handle of the child window for the Yes button in the User Account Control window so i can click it. This window has a structure with a few child windows with the same name.

Code:

        Dim hwnd As IntPtr = FindWindow(Nothing, "User Account Control")
        Dim hwnd2 As IntPtr = FindWindowEx(hwnd, 0, "DirectUIHWND", vbNullString)
        Dim hwnd3 As IntPtr = FindWindowEx(hwnd2, 0, "CtrlNotifySink", vbNullString)
        Dim hwnd4 As IntPtr = FindWindowEx(hwnd3, 0, "Button", "&Yes")

There are multiple CtrNotifySink with its own Button child window or other child windows. How do i search thru the different CtrNotifySink window to find the one that contain the Yes button so i can send a click to it?

I do need to find it before i can send a click, right? because i try just sending it to the main window with sendmessage and nothing happen.

I even try sending it directly to the handle found by spy++ of the yes button with bm click but nothing happen