Win32::GUI::EnumMyWindows() should return a list of
window created by the calling process.
It returns an empty list. This is because the callback
a test of the windows style against GW_CHILD, when it
be testing against WS_CHILD.
The callback (EnumMyWindowsProc in GUI_helpers.cpp) does
not need to perform this test at all, as EnumWindows() only
performs the callback for top level windows
(without WS_CHILD), according to MSDN:
Additionally there is an uncommented debug printf in
GUI.xs (v1.29, line 3908) that should be commented out, or