Trying to add an exit confirmation dialog to Cygwin setup.exe, failing

[Andy Koppe]

> Cygwin setup.exe's message loop is this
>  while (GetMessage (&msg, NULL, 0, 0) != 0
>         && GetMessage (&msg, (HWND) NULL, 0, 0) != -1)

I might not sufficiently understand Win32 messaging, but to me that
looks as if it's dropping every other message. Shirley it should be
calling GetMessage only once?

Andy