C++ RealTimeStylus is dead and doesn't handle any touch messages.

Question

After some testing, I found that the RTS touch library on win7 sp1 systems has a probability of triggering an error: RealTimeStylus does not trigger, i.e. it does not trigger the touch callback class even if there is a touch point that has been pressed on the corresponding window. This problem disappeared after restarting the program, but it was caused by the fact that after starting the program, another program opened a full screen window and grabbed the focus, and then my program RTS died as if it didn't process any touch messages (my bound window was still on the top level). At the same time the RTS bound window has WS_EX_LAYERED and WS_EX_NOACTIVATE and HWND_TOPMOST and does not remove these flags. I am using C++.