Some sysval about the SMBX Messagebox

[Slash_18]

sysval(MessagebX) and sysval(MessagebY) (R&W):
These 2 varibles will affect the SMBX Messagebox's position.
sysval(Messagebcolor) (R&W):
This varible can affect the color of the Messagebox, can use rgba.
sysval(MessagebWidth) (R&W):
Change the Width of Messagebox, there's no need sysval to change it's height as you can change it yourself by typing.