I'm talking about the bluish screen that comes up when you hit tab (when you're actually running a game).
Is that even possible?
I found this chunk in ui.h
/* handy colors */
#define ARGB_WHITE MAKE_ARGB(0xff,0xff,0xff,0xff)
#define ARGB_BLACK MAKE_ARGB(0xff,0x00,0x00,0x00)
#define UI_FILLCOLOR MAKE_ARGB(0xe0,0x10,0x10,0x30)
#define UI_YELLOWCOLOR MAKE_ARGB(0xe0,0x60,0x60,0x10)
#define UI_REDCOLOR MAKE_ARGB(0xf0,0x60,0x10,0x10)
And it +looks+ like the UI_FILLCOLOR is used for the menu background, but I'm not 100% sure.
I found how to customize the font used (covert a TTF to BDC file and name it ui.bdc), but no luck with changing the color of the font.
According to the mame notes, custom Font was added back around .31 and custom menu colors in .36, but I have yet to find any mention of actually setting custom colors.
Any ideas or am I just totally missing the obvious?