I found two threads on it via SuperSearch, and just posted another top-level node on that. I'm familiar with the Win32 API, and that module is still cryptic. For example, the inline POD's tell of options for creating a window, but no documentation of the base class options that work for all widgets and are mentioned in the Q&A section here, like -size => [$x,$y] which is rather important, and no clue about the message loop thing also seen in the example.

When I ran that example, or anything else it seems, I get a null pointer error.

—John