Drawing transparent rectangle wxWidgets

how is it possible to draw a transparent rectangle using wxWdigets, I have tried using transparent brush, but it doesn't work , also when I searched I found that anything uses wxDC wont support transparent , therefore I have to use wxGraphicsContext , but when I tried using it , I got this error wxGraphicsContext was not declared in this scope, and it's not going to work on all the platforms , so what is the best solution to draw transparent shapes/images and it will work on most of the platforms ?