>>-SysGetKey(-+-----+-)----------------------------------------><
+-opt-+Reads and returns the next key from the keyboard buffer. If the keyboard buffer is empty, SysGetKey waits until a key is pressed. Unlike the CHARIN built-in function, SysGetKey does not wait until the Enter key is pressed.
Parameter:
An option controlling screen echoing. Allowed values are:
Echo the pressed key to the screen. This is the default.
Do not echo the pressed key.