PUBLIC xform
xform=CREATEOBJECT("myform")
xform.show 
DEFINE CLASS myform as Form 
   xnumber=22
   PROCEDURE init
      priv xnumber2
      xnumber2=33
   ENDPROC 
ENDDEFINE    

xnumber is a property not a variable and valid in all life of form. and xnumber2 is only a variable. dead with end of init.