winCE/Windows 應用程式訊息提示框自動消失功能

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      近期在做winCE系統的掃描槍應用程式，遇到了一些問題，其中包括消失提示框在手持終端顯示過小，

使用者要求提示框提示幾秒後自動關閉，Windows平台可以通過調用系統API以定時器的方式進行自動銷毀。

不過在winCE上存在不同，由於winCE系統屬於精簡版的windows系統，所以在API上也是屬於精簡後的，

Windows平台銷毀訊息框用user32.dll中的FindWindow和PostMessage完成，而winCE平台並沒有

user32.dll，不過對應的API在coredll.dll中。

windows平台範例程式碼：

 1         [DllImport("user32.dll", EntryPoint = "FindWindow", CharSet = CharSet.Auto)] 2         internal static extern IntPtr FindWindow(string className,string windowName); 3  4         [DllImport("user32.dll", EntryPoint = "PostMessage", CharSet = CharSet.Auto)] 5         internal static extern int PostMessage(IntPtr hWnd,int msg,IntPtr wParam,IntPtr lParam); 6  7         internal const int WM_CLOSE = 0x10; 8         Timer timer = new Timer(); 9 10         private void btnAutoCloseMesaage_Click(object sender, EventArgs e)11         {12             runKillTimer();13             MessageBox.Show("操作已完成，可以關閉！","Message");14         }15 16         /// <summary>17         /// 運行timer18         /// </summary>19         internal void runKillTimer()20         {21             timer.Interval = 2000;22             timer.Tick+=timer_Tick;23             timer.Start();24         }25 26         /// <summary>27         /// timer觸發關閉訊息框28         /// </summary>29         /// <param name="sender"></param>30         /// <param name="e"></param>31         private void timer_Tick(object sender, EventArgs e)32         {33             KillMessageBox();34             timer.Stop();35         }36 37         /// <summary>38         /// 調用API尋找表單並關閉39         /// </summary>40         internal void KillMessageBox()41         {42             IntPtr msgPtr = FindWindow(null, "Message");43             if (msgPtr != IntPtr.Zero)44             {45                 PostMessage(msgPtr, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);46             }47         }

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winCE平台範例程式碼:

 1 [DllImport("coredll.dll", EntryPoint = "FindWindow", CharSet = CharSet.Auto)] 2         internal static extern IntPtr FindWindow(string className,string windowName); 3  4         [DllImport("coredll.dll", EntryPoint = "PostMessage", CharSet = CharSet.Auto)] 5         internal static extern int PostMessage(IntPtr hWnd,int msg,IntPtr wParam,IntPtr lParam); 6  7         internal const int WM_CLOSE = 0x10; 8         Timer timer = new Timer(); 9 10         private void btnAutoCloseMesaage_Click(object sender, EventArgs e)11         {12             runKillTimer();13             MessageBox.Show("操作已完成，可以關閉！","Message");14         }15 16         /// <summary>17         /// 運行timer18         /// </summary>19         internal void runKillTimer()20         {21             timer.Interval = 2000;22             timer.Tick+=new EventHandler(timer_Tick);23             timer.Enabled = true;24         }25 26         /// <summary>27         /// timer觸發關閉訊息框28         /// </summary>29         /// <param name="sender"></param>30         /// <param name="e"></param>31         private void timer_Tick(object sender, EventArgs e)32         {33             KillMessageBox();34             timer.Enabled = false;35         }36 37         /// <summary>38         /// 調用API尋找表單並關閉39         /// </summary>40         internal void KillMessageBox()41         {42             IntPtr msgPtr = FindWindow(null, "Message");43             if (msgPtr != IntPtr.Zero)44             {45                 PostMessage(msgPtr, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);46             }47         }

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ps:大家有其他好的意見或建議也可以多多交流。

winCE/Windows 應用程式訊息提示框自動消失功能