Display PCBTEXT entry “prompt” and get a string (maximum length “len”, valid characters “valid”, flags “flags”) from the user, assigning it to “var”
valid length: 1-256 valid characters: any string valid flags: ECHODOTS FIELDLEN GUIDE UPCASE STACKED ERASELINE NEWLINE LFBEFORE LFAFTER WORDWRAP NOCLEAR HIGHASCII AUTO YESNO
See also: DispText