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I'm trying to ge the handle for "Yes" button in a dialog, so I can send the message to click it.

I get the dialog and then I try to find the button, but I always get 0 back.

import win32gui
hwnd = win32gui.FindWindow("#32770", "Programs and Features")
# got back the correct handle to the dialog
win32gui.SetForegroundWindow(hwnd)
btnhdl = win32gui.FindWindowEx(hwnd, 0, "Button", "&Yes")
# returns 0
The button is there and the class and title seem to be ok. I verified it by this:
def printClasses(childHwnd, lparam):
    if win32gui.GetWindowText(childHwnd) == "&Yes":
        print win32gui.GetClassName(childHwnd), win32gui.GetWindowText(childHwnd)
    return 1
win32gui.EnumChildWindows(hwnd, printClasses, None)
# output: Button &Yes
Looks like everything should be fine, but why it doesn't return the handle with FindWindowEx?
Thanks
                Maybe the button is a child of a child, ie a grandchild? IIRC EnumChildWindow enumerates recursively while FindWindowEx does not.
– rodrigo
                May 10, 2012 at 19:19
                @rodrigo Yes, that is correct. It is actually two levels down. From the question EnumChildWindows or FindWindowEx I got an impression that they work similar way. You should probably post it as an answer, so I can accept it. Thanks
– Alex Okrushko
                May 10, 2012 at 20:03
        
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