事件
activate
afterdock
beforedock
click
dblclick
deactivate
destroy
dragdrop
dragover
error
init
middleclick 事件
mousedown
mousemove
mouseup
mousewheel
moved
olecompletedrag
oledragdrop
oledragover
olegivefeedback
olesetdata
olestartdrag
paint
resize
rightclick
undock