我有一个窗口应用程序。当我最小化任务栏上的窗口应用程序以处理另一个应用程序时。我们有一种工具可以将消息从一个窗口应用程序发送到另一个窗口应用程序。
所以我的第一个 win 应用程序被最小化，现在我打开我的另一个 win 应用程序，然后向第一个应用程序发送消息，但第一个应用程序在任务栏上。所以我想要这样的功能，比如当任何消息捕获我的第一个应用程序时，它会像 Skype 或任何信使一样闪烁。
我已经尝试过FlashWindowEx的方法User32.dll，但没有运气。我已经尝试使用“持续闪烁直到窗口出现在前台”选项。但没有运气。
请用一个例子帮我解决这个问题。
我这样做如下所示，确保添加所需的引用，如图所示
using System.Runtime.InteropServices;
using Microsoft.Win32;
// To support flashing.
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool FlashWindowEx(ref FLASHWINFO pwfi);
//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 window comes to the foreground.
public const UInt32 FLASHW_TIMERNOFG = 12;
[StructLayout(LayoutKind.Sequential)]
public struct FLASHWINFO
{
public UInt32 cbSize;
public IntPtr hwnd;
public UInt32 dwFlags;
public UInt32 uCount;
public UInt32 dwTimeout;
}
// Do the flashing - this does not involve a raincoat.
public static bool FlashWindowEx(Form form)
{
IntPtr hWnd = form.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);
}
这应该包含您需要的一切。
我希望这有帮助。
C#：任务栏中的 Flash 窗口通过 Win32 FlashWindowEx它适用于我。
Windows API (Win32) 在 User32 库中有 FlashWindowEx 方法；此方法允许您（开发人员）闪烁一个窗口，向用户表明应用程序中发生了需要他们注意的一些重大事件。最常见的用法是使窗口闪烁，直到用户将焦点返回到应用程序。但是，您也可以将窗口闪烁指定次数，或者只是继续闪烁，直到您决定何时停止。
但是，FlashWindowEx 方法的使用并未内置到任何地方的 .NET Framework 中。为了访问它，您需要使用 .NET 的平台调用 (PInvoke) 功能“下拉”到 Windows API (Win32) 并直接调用它。此外，与 Windows API 中的许多其他功能（不直接由 .NET 公开）一样，如果您不熟悉在 .NET 中使用 Windows API，则使用 FlashWindowEx 方法可能会有些棘手。
现在，与其深入探讨 PInvoke 或 Win32 FlashWindowEx 方法的细节，下面是一个简单的 C# 静态类，可让您轻松利用此方法。实际上需要相当多的信息来解释如何使用 PInvoke 来利用 Windows API (Win32)，所以我可能会在以后的文章中介绍这些信息。
下面是这个静态类的一些示例用法：
// One this to note with this example usage code, is the "this" keyword is referring to // the current System.Windows.Forms.Form. // Flash window until it recieves focus FlashWindow.Flash(this); // Flash window 5 times FlashWindow.Flash(this, 5); // Start Flashing "Indefinately" FlashWindow.Start(this); // Stop the "Indefinate" Flashing FlashWindow.Stop(this);关于 FlashWindowEx 方法需要注意的一点是，它需要（并且只能在）Windows 2000 或更高版本上运行。
这是 C# 中静态类的代码：
public static class FlashWindow { [DllImport("user32.dll")] [return: MarshalAs(UnmanagedType.Bool)] private static extern bool FlashWindowEx(ref FLASHWINFO pwfi); [StructLayout(LayoutKind.Sequential)] private struct FLASHWINFO { /// <summary> /// The size of the structure in bytes. /// </summary> public uint cbSize; /// <summary> /// A Handle to the Window to be Flashed. The window can be either opened or minimized. /// </summary> public IntPtr hwnd; /// <summary> /// The Flash Status. /// </summary> public uint dwFlags; /// <summary> /// The number of times to Flash the window. /// </summary> public uint uCount; /// <summary> /// The rate at which the Window is to be flashed, in milliseconds. If Zero, the function uses the default cursor blink rate. /// </summary> public uint dwTimeout; } /// <summary> /// Stop flashing. The system restores the window to its original stae. /// </summary> public const uint FLASHW_STOP = 0; /// <summary> /// Flash the window caption. /// </summary> public const uint FLASHW_CAPTION = 1; /// <summary> /// Flash the taskbar button. /// </summary> public const uint FLASHW_TRAY = 2; /// <summary> /// Flash both the window caption and taskbar button. /// This is equivalent to setting the FLASHW_CAPTION | FLASHW_TRAY flags. /// </summary> public const uint FLASHW_ALL = 3; /// <summary> /// Flash continuously, until the FLASHW_STOP flag is set. /// </summary> public const uint FLASHW_TIMER = 4; /// <summary> /// Flash continuously until the window comes to the foreground. /// </summary> public const uint FLASHW_TIMERNOFG = 12; /// <summary> /// Flash the spacified Window (Form) until it recieves focus. /// </summary> /// <param name="form">The Form (Window) to Flash.</param> /// <returns></returns> public static bool Flash(System.Windows.Forms.Form form) { // Make sure we're running under Windows 2000 or later if (Win2000OrLater) { FLASHWINFO fi = Create_FLASHWINFO(form.Handle, FLASHW_ALL | FLASHW_TIMERNOFG, uint.MaxValue, 0); return FlashWindowEx(ref fi); } return false; } private static FLASHWINFO Create_FLASHWINFO(IntPtr handle, uint flags, uint count, uint timeout) { FLASHWINFO fi = new FLASHWINFO(); fi.cbSize = Convert.ToUInt32(Marshal.SizeOf(fi)); fi.hwnd = handle; fi.dwFlags = flags; fi.uCount = count; fi.dwTimeout = timeout; return fi; } /// <summary> /// Flash the specified Window (form) for the specified number of times /// </summary> /// <param name="form">The Form (Window) to Flash.</param> /// <param name="count">The number of times to Flash.</param> /// <returns></returns> public static bool Flash(System.Windows.Forms.Form form, uint count) { if (Win2000OrLater) { FLASHWINFO fi = Create_FLASHWINFO(form.Handle, FLASHW_ALL, count, 0); return FlashWindowEx(ref fi); } return false; } /// <summary> /// Start Flashing the specified Window (form) /// </summary> /// <param name="form">The Form (Window) to Flash.</param> /// <returns></returns> public static bool Start(System.Windows.Forms.Form form) { if (Win2000OrLater) { FLASHWINFO fi = Create_FLASHWINFO(form.Handle, FLASHW_ALL, uint.MaxValue, 0); return FlashWindowEx(ref fi); } return false; } /// <summary> /// Stop Flashing the specified Window (form) /// </summary> /// <param name="form"></param> /// <returns></returns> public static bool Stop(System.Windows.Forms.Form form) { if (Win2000OrLater) { FLASHWINFO fi = Create_FLASHWINFO(form.Handle, FLASHW_STOP, uint.MaxValue, 0); return FlashWindowEx(ref fi); } return false; } /// <summary> /// A boolean value indicating whether the application is running on Windows 2000 or later. /// </summary> private static bool Win2000OrLater { get { return System.Environment.OSVersion.Version.Major >= 5; } } }
我知道这个问题已经很老了，但是根据 MoonKnight 的回答，我做了一个改进，有些人可能会觉得有用。我将其转换为表单扩展。
public static class ExtensionMethods
{
// To support flashing.
[DllImport("user32.dll", CallingConvention = CallingConvention.Cdecl)]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool FlashWindowEx(ref FLASHWINFO pwfi);
//Flash both the window caption and taskbar button.
//This is equivalent to setting the FLASHW_CAPTION | FLASHW_TRAY flags.
private const uint FLASHW_ALL = 3;
// Flash continuously until the window comes to the foreground.
private const uint FLASHW_TIMERNOFG = 12;
[StructLayout(LayoutKind.Sequential)]
private struct FLASHWINFO
{
public uint cbSize;
public IntPtr hwnd;
public uint dwFlags;
public uint uCount;
public uint dwTimeout;
}
/// <summary>
/// Send form taskbar notification, the Window will flash until get's focus
/// <remarks>
/// This method allows to Flash a Window, signifying to the user that some major event occurred within the application that requires their attention.
/// </remarks>
/// </summary>
/// <param name="form"></param>
/// <returns></returns>
public static bool FlashNotification(this Form form)
{
IntPtr hWnd = form.Handle;
FLASHWINFO fInfo = new FLASHWINFO();
fInfo.cbSize = Convert.ToUInt32(Marshal.SizeOf(fInfo));
fInfo.hwnd = hWnd;
fInfo.dwFlags = FLASHW_ALL | FLASHW_TIMERNOFG;
fInfo.uCount = uint.MaxValue;
fInfo.dwTimeout = 0;
return FlashWindowEx(ref fInfo);
}
}
要在表单上使用它，您只需调用
this.FlashNotification();
要更改它的闪烁方式，只需查看此表
伙计们，我找到了一种更简单的方法！如果是这种情况，您正在使用它。
在 .NET 4.0、C# 中，如果您只是使用
this.WindowState = FormWindowState.Normal;
this.Activate();
第一行确保它没有被最小化，第二行使它成为焦点。我不确定确切的原因（其中任何一个都不这样做），但结合起来，如果你从这个表单中显示一个 MessageBox，你的程序会在任务栏中闪烁橙色！