Add info about MakeWinMsgEv to HACKING.
treebfcc6738e183fb89c45cbd2a288e188675fbf9eb
-rw-r--r-- 35147 COPYING
drwxr-xr-x - incoming
-rwxr-xr-x 1150 mktar.pl
drwxr-xr-x - patches
drwxr-xr-x - src