🚀 go-pugleaf

In C/Set there is a macro that casts from &msg to a *_COMMANDMSG structure.
A version that works with GCC is as follows:

/* pmgnu.h - macros not found in the distribution */
typedef struct __COMMANDMSG {
	USHORT msg;	/* the WM_COMMAND msg */
	USHORT fill1;	/* args are 32 bit aligned */
	USHORT cmd;	/* the subcommand */
} _COMMANDMSG, *_pCOMMANDMSG;
#define COMMANDMSG( msg )  ((_pCOMMANDMSG) (msg))

typedef struct __CHARMSG {
	USHORT msg;	/* the WM_CHAR msg */
	USHORT fill1;	/* allingment */
	USHORT fs;	/* the modifier flags (is Vkey, isCTRL, etc... ) */
	USHORT fill2; 	/* never saw this */
	USHORT chr;	/* the keycode */
	USHORT vkey;	/* the virtual keycode */
} _CHARMSG, *_pCHARMSG;
#define CHARMSG( msg )  ((_pCHARMSG) (msg))

/* also you may find it usefull to define */
#define CALLBACK EXPENTRY

I got this code from 'urbas@RZ-Berlin.MPG.DE', so if you use it, you might
drop a note and thank him.  He did the hard work