滚动条的Scroll 事件用来跟踪滚动条内滑动块的动态变化。程序运行时,用户在滚动条内拖动滑动块、单击滚动条两端箭头,或单击滑动块两边的空白处时,都会触发滚动条的Scroll事件。
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若将计时器的Interval属性设置为0,或将其Enabled属性被设置为False时,则不触发计时器控件的Timer事件。
A. 对
B. 错
计时器的Interval属性值既可以在设计阶段设置,也可以在程序运行时通过代码进行设置。
A. 对
B. 错
Fill in each blank with “turn”, “stand”, “engage” or “grow” in the word’s proper form.When I walked in, they all_________up and started clapping.
Fill in each blank with “turn”, “stand”, “engage” or “grow” in the word’s proper form.I want to __________ in computer science in the future.