winCE/Windows 应用程序消息提示框自动消失功能

      近期在做winCE系统的扫描枪应用程序，遇到了一些问题，其中包括消失提示框在手持终端显示过小，

用户要求提示框提示几秒后自动关闭，Windows平台可以通过调用系统API以定时器的方式进行自动销毁。

不过在winCE上存在不同，由于winCE系统属于精简版的windows系统，所以在API上也是属于精简后的，

Windows平台销毁消息框用user32.dll中的FindWindow和PostMessage完成，而winCE平台并没有

user32.dll，不过对应的API在coredll.dll中。

windows平台示例代码：

        [DllImport("user32.dll", EntryPoint = "FindWindow", CharSet = CharSet.Auto)]
        internal static extern IntPtr FindWindow(string className,string windowName);

        [DllImport("user32.dll", EntryPoint = "PostMessage", CharSet = CharSet.Auto)]
        internal static extern int PostMessage(IntPtr hWnd,int msg,IntPtr wParam,IntPtr lParam);

        internal const int WM_CLOSE = 0x10;
        Timer timer = new Timer();

        private void btnAutoCloseMesaage_Click(object sender, EventArgs e)
        {
            runKillTimer();
            MessageBox.Show("操作已完成，可以关闭！","Message");
        }

        /// <summary>
        /// 运行timer
        /// </summary>
        internal void runKillTimer()
        {
            timer.Interval = 2000;
            timer.Tick+=timer_Tick;
            timer.Start();
        }

        /// <summary>
        /// timer触发关闭消息框
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void timer_Tick(object sender, EventArgs e)
        {
            KillMessageBox();
            timer.Stop();
        }

        /// <summary>
        /// 调用API查找窗体并关闭
        /// </summary>
        internal void KillMessageBox()
        {
            IntPtr msgPtr = FindWindow(null, "Message");
            if (msgPtr != IntPtr.Zero)
            {
                PostMessage(msgPtr, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
            }
        }

winCE平台示例代码:

[DllImport("coredll.dll", EntryPoint = "FindWindow", CharSet = CharSet.Auto)]
        internal static extern IntPtr FindWindow(string className,string windowName);

        [DllImport("coredll.dll", EntryPoint = "PostMessage", CharSet = CharSet.Auto)]
        internal static extern int PostMessage(IntPtr hWnd,int msg,IntPtr wParam,IntPtr lParam);

        internal const int WM_CLOSE = 0x10;
        Timer timer = new Timer();

        private void btnAutoCloseMesaage_Click(object sender, EventArgs e)
        {
            runKillTimer();
            MessageBox.Show("操作已完成，可以关闭！","Message");
        }

        /// <summary>
        /// 运行timer
        /// </summary>
        internal void runKillTimer()
        {
            timer.Interval = 2000;
            timer.Tick+=new EventHandler(timer_Tick);
            timer.Enabled = true;
        }

        /// <summary>
        /// timer触发关闭消息框
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void timer_Tick(object sender, EventArgs e)
        {
            KillMessageBox();
            timer.Enabled = false;
        }

        /// <summary>
        /// 调用API查找窗体并关闭
        /// </summary>
        internal void KillMessageBox()
        {
            IntPtr msgPtr = FindWindow(null, "Message");
            if (msgPtr != IntPtr.Zero)
            {
                PostMessage(msgPtr, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
            }
        }

ps:大家有其他好的意见或建议也可以多多交流。