方法
addobject
addproperty
box
circle
cls
draw
hide
line
move
newobject
oledrag
point
print
pset
readexpression
readproperty
refresh
release
removeobject
resettodefault
saveas
saveasclass
setall
setviewport
show
showwhatsthis
textheight
textwidth
whatsthismode
writeexpression
write方法
zorder