   COMMON SHARED z,w,l,s$,t,keypressed,pvez
   declare function edit(column,row,length,text$)
   const fgcol=16, bgcol=15, enter=13, escape=27, uparrow=72
   const downarrow = 80, leftarrow=75, rightarrow=77, home=71
   const endkey=79, ins= 82, del =83, backspace=8, FF1=59, FF2=60, FF3=61, FF4=62, FF5=63, FF6=64, FF7=65, ff8=66, FF9=67, FF10=68
