在不窃取焦点的情况下吸引用户注意

我有一个程序，让用户打开几个表单。 一旦给定的事件发生（例如：30秒已经过去），我需要让用户注意触发事件的Form，而不会窃取焦点。 我已经把表格放在首位了

f.TopMost = true; 

但我想实现一些替代方案。 由于改变框架的边框颜色似乎是一项几乎不可能的任务（这个解决方案本来就是最好的），有人知道如何在不偷窃焦点的情况下获得关注吗？

Answer 1

选项A：您需要使用Windows API中的FlashWindowEx。 这在.NET中不可用，因此您需要使用PInvoke。

选项B：使用系统托盘中的气球提示。 它内置于.NET中，但要求您的应用程序使用您可能不需要的通知图标。 更多细节： http ： //msdn.microsoft.com/en-us/library/system.windows.forms.notifyicon.showballoontip.aspx

以下是如何使用选项A的示例：

pInvoke.net就是最好的例子： http ：//pinvoke.net/default.aspx/user32.FlashWindowEx

 [DllImport("user32.dll")] [return: MarshalAs(UnmanagedType.Bool)] static extern bool FlashWindowEx(ref FLASHWINFO pwfi); 

用户定义的类型：

 [StructLayout(LayoutKind.Sequential)] public struct FLASHWINFO { public UInt32 cbSize; public IntPtr hwnd; public UInt32 dwFlags; public UInt32 uCount; public UInt32 dwTimeout; } 

笔记：

 //Stop flashing. The system restores the window to its original state. public const UInt32 FLASHW_STOP = 0; //Flash the window caption. public const UInt32 FLASHW_CAPTION = 1; //Flash the taskbar button. public const UInt32 FLASHW_TRAY = 2; //Flash both the window caption and taskbar button. //This is equivalent to setting the FLASHW_CAPTION | FLASHW_TRAY flags. public const UInt32 FLASHW_ALL = 3; //Flash continuously, until the FLASHW_STOP flag is set. public const UInt32 FLASHW_TIMER = 4; //Flash continuously until the window comes to the foreground. public const UInt32 FLASHW_TIMERNOFG = 12; 

提示与技巧：

请加一些！

示例代码：

 /// 
 /// Flashes a window /// 
 /// The handle to the window to flash /// whether or not the window needed flashing public static bool FlashWindowEx(IntPtr hWnd) { FLASHWINFO fInfo = new FLASHWINFO(); fInfo.cbSize = Convert.ToUInt32(Marshal.SizeOf(fInfo)); fInfo.hwnd = hWnd; fInfo.dwFlags = FLASHW_ALL; fInfo.uCount = UInt32.MaxValue; fInfo.dwTimeout = 0; return FlashWindowEx(ref fInfo); } 

…

 /// Minor adjust to the code above /// 
 /// Flashes a window until the window comes to the foreground /// Receives the form that will flash /// 
 /// The handle to the window to flash /// whether or not the window needed flashing public static bool FlashWindowEx(Form frm) { IntPtr hWnd = frm.Handle; FLASHWINFO fInfo = new FLASHWINFO(); fInfo.cbSize = Convert.ToUInt32(Marshal.SizeOf(fInfo)); fInfo.hwnd = hWnd; fInfo.dwFlags = FLASHW_ALL | FLASHW_TIMERNOFG; fInfo.uCount = UInt32.MaxValue; fInfo.dwTimeout = 0; return FlashWindowEx(ref fInfo); } 

---

以下是Microsoft的官方示例： http ： //msdn.microsoft.com/en-us/library/ms679347（v = vs。85）.aspx

  [DllImport("user32.dll")] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool FlashWindowEx(ref FLASHWINFO pwfi); [StructLayout(LayoutKind.Sequential)] public struct FLASHWINFO { /// 
 /// The size of the structure in bytes. /// 
 public uint cbSize; /// 
 /// A Handle to the Window to be Flashed. The window can be either opened or minimized. /// 
 public IntPtr hwnd; /// 
 /// The Flash Status. /// 
 public FlashWindowFlags dwFlags; //uint /// 
 /// The number of times to Flash the window. /// 
 public uint uCount; /// 
 /// The rate at which the Window is to be flashed, in milliseconds. If Zero, the function uses the default cursor blink rate. /// 
 public uint dwTimeout; } public enum FlashWindowFlags : uint { /// 
 /// Stop flashing. The system restores the window to its original state. /// 
 FLASHW_STOP = 0, /// 
 /// Flash the window caption. /// 
 FLASHW_CAPTION = 1, /// 
 /// Flash the taskbar button. /// 
 FLASHW_TRAY = 2, /// 
 /// Flash both the window caption and taskbar button. /// This is equivalent to setting the FLASHW_CAPTION | FLASHW_TRAY flags. /// 
 FLASHW_ALL = 3, /// 
 /// Flash continuously, until the FLASHW_STOP flag is set. /// 
 FLASHW_TIMER = 4, /// 
 /// Flash continuously until the window comes to the foreground. /// 
 FLASHW_TIMERNOFG = 12 } public static bool FlashWindow(IntPtr hWnd, FlashWindowFlags fOptions, uint FlashCount, uint FlashRate) { if(IntPtr.Zero != hWnd) { FLASHWINFO fi = new FLASHWINFO(); fi.cbSize = (uint)Marshal.SizeOf(typeof(FLASHWINFO)); fi.dwFlags = fOptions; fi.uCount = FlashCount; fi.dwTimeout = FlashRate; fi.hwnd = hWnd; return FlashWindowEx(ref fi); } return false; } public static bool StopFlashingWindow(IntPtr hWnd) { if(IntPtr.Zero != hWnd) { FLASHWINFO fi = new FLASHWINFO(); fi.cbSize = (uint)Marshal.SizeOf(typeof(FLASHWINFO)); fi.dwFlags = (uint)FlashWindowFlags.FLASHW_STOP; fi.hwnd = hWnd; return FlashWindowEx(ref fi); } return false; } 

Answer 2

在Windows 7中，表单上的进度条显示在其任务栏按钮中; 你可以利用它。 还有一种方法可以简单地突出显示任务栏按钮，就像IM程序在收到新消息时所做的那样。