控件 control (n.); controls; rich edit control rich edit; up-down control up-down; visual basic activex control visual basic activex; widget; wmi control
Typically , request events signal a visual change for one or more components ; for example , clicking on a graphic in a tree control may expand a branch of the tree 最典型的有請求事件可能會觸發(fā)了一個或多個組件的顯示變化;例如當(dāng)點擊一個樹型控件可能會展開它的分支。
Alternatively , an event in one component may update the visual representation of another component ; for example , clicking on a leaf node in a tree may cause an associated list to change its contents and redisplay 另外,某個組件的事件可能會更新另一個組件的顯示;例如當(dāng)點擊一個樹型控件的葉節(jié)點可能會導(dǎo)致和它關(guān)聯(lián)的列表控件改變它的內(nèi)容和顯示。