用VC 制作MSN、QQ 的消息提示窗口

二、QQ淡出淡出显示实现

　　其实用到一个API函数：AnimateWindow,下面是这个函数的一些说明：

BOOL AnimateWindow( 　HWND hwnd, // handle to the window to animate 　DWORD dwTime, // duration of animation 　DWORD dwFlags // animation type );

　　上面的函数前两个参数一看就明白，不用说了，最后一个参数dwFlags设置动画窗口的样式：

　　各种标志说明：

标志	说明
AW_SLIDE	Uses slide animation. By default, roll animation is used. This flag is ignored when used with the AW_CENTER flag.
AW_ACTIVATE	Activates the window. Do not use this flag with AW_HIDE.
AW_BLEND	Uses a fade effect. This flag can be used only if hwnd is a top-level window.
AW_HIDE	Hides the window. By default, the window is shown.
AW_CENTER	Makes the window appear to collapse inward if the AW_HIDE flag is used or expand outward if the AW_HIDE flag is not used.
AW_HOR_POSITIVE	Animate the window from left to right. This flag can be used with roll or slide animation. It is ignored when used with the AW_CENTER flag.
AW_HOR_NEGATIVE	Animate the window from right to left. This flag can be used with roll or slide animation. It is ignored when used with the AW_CENTER flag.
AW_VER_POSITIVE	Animate the window from top to bottom. This flag can be used with roll or slide animation. It is ignored when used with the AW_CENTER flag.
AW_VER_NEGATIVE	Animate the window from bottom to top. This flag can be used with roll or slide animation. It is ignored when used with the AW_CENTER flag.

　　以上内容是从MSDN中摘录的，要淡入淡出的效果的话，用到AW_BELND。

　　三、控制窗口显示的代码

CMainFrame::OnCreate(…) { 　//... 　AnimateWindow(GetSafeHwnd(),1000,AW_CENTER|AW_BLEND); 　//… }

　　四、关闭的代码

CMainFrame::OnClose(..) { 　AnimateWindow(GetSafeHwnd(),1000,AW_HIDE|AW_CENTER|AW_BLEND); }

　　其实AnimateWindow只是利用了windows本身的方法，如果您要更加有个性的窗口效果，那就得多做写些代码了，一分辛苦，一分收获吧

　　五、结束语

　　其实就MSN的提示窗口来说，如果要从使用复杂一点的背景和效果，那么还有刷新屏幕的问题，应做到无闪刷新.由于时间苍促，不足之处必然有之，同时以上代码也参考了一部分以前 VCKBASE 技术文档，在此表示感谢！

　　如果有问题，欢迎交流！共同进步！

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