The touchscreen can be queried over the functions TOUCH!, NEWTOUCH!, TOUCHED!, TCHINSIDE! and the integer variables TCHX and TCHY. These are set by repeated query of the touchstatus (BIOS Function). The touch screen status can be changed with TCHSET . The query takes place (temporally) irregularly. Time consuming operations can retard the query occasionally. With SYS 2 one can force the immediate query. In normal case this is however not necessary.
In the case of the touch screen inquiry also the ESC button is evaluated and - if pressed - the basic program stops.
A simple wait for any touch of the screen can be done by WAITTOUCH.

The state of the action wheel can be requested by LEVERPUSH.