事件
click
dblclick
destroy
dragdrop
dragover
error
errormessage
gotfocus
init
keypress
lostfocus
message
middleclick 事件
mousedown
mousemove
mouseup
mousewheel
olecompletedrag
oledragdrop
oledragover
olegivefeedback
olesetdata
olestartdrag
rightclick
valid
when