Draw a rounded rectangle. If the last numeric argument is above 7 it is treated as an RGB colour.
RBOX x, y, w, h [, radius] [, lw] [, fill] [, colour]
x, y - top-left w, h - size radius - corner radius (default 10) lw - line width fill - fill colour colour - outline colour
Example:
RBOX 80, 20, 40, 40, 6, RGB(0, 0, 255)Source: docs/help/rbox.txt inmmcore. On the computer, typeHELP RBOX.