A checkbox allows to switch an option on ore of. The return value for the a changed checkbox contains the main value of the selector combined with the subvalue 0, if the checkbox is switch off, or with 1 if the checkbox is switched on.

The type number for a radiobutton is 1.

Example:

forminit ! several checkboxes formentry "italic", 5,30,95,44, 1, 10 formentry "bold", 5,50,95,64, 1, 20 formentry "underlined", 5,70,95,84, 2, 30 formdisplay $m1 formtouch sel messagebox "Selected:"+string(sel) goto m1