一个非常逼真的QQ登录界面。绘制位图按钮，展开登录界面，绘制背景色等等。

Drawing bitmap button to start the registry interface, rendering the background color and so on.

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点击Browse按钮以打开Encyclopedia File Manager(图9)，从这里我们可以选择一个位图文件，将其作为图标使用。

Clicking the Browse button opens the Encyclopedia file Manager (Figure 9), where we can choose a bitmap file to use as an icon.

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禁止存取状态的按钮的位图通常和正常状态的一样，但是颜色的对比度较小，就象变灰的菜单选项一样。

The bitmap for the disabled state usually resembles the one for the up state but has lower contrast (like a dimmed or grayed menu selection).

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