菜鸟发问 点击ScrollBar的两端的箭头的时候 往消息列队发送的是什么消息
点击ScrollBar的两端的箭头的时候 往消息列队发送的是什么消息
比如我想实现用一个ScrollBar控制一个Edit显示的数字，按Scroll上面的箭头Edit中数字加一，按下面的箭头减一
<<Programming Windows(Fifth Edition)>> Chapter four Scroll Bar You use the identifiers containing the words LEFT and RIGHT for horizontal scroll bars, and the identifiers with UP, DOWN, TOP, and BOTTOM with vertical scroll bars. The notification codes associated with clicking the mouse on various areas of the scroll bar are shown in Figure 4-9.
Figure 4-9. Identifiers for the wParam values of scroll bar messages.
If you hold down the mouse button on the various parts of the scroll bar, your program can receive multiple scroll bar messages. When the mouse button is released, you'll get a message with a notification code of SB_ENDSCROLL. You can generally ignore messages with the SB_ENDSCROLL notification code. Windows will not change the position of the scroll bar thumb. Your application does that by calling SetScrollPos.
