1 files changed, 109 insertions, 0 deletions
diff --git a/samples/IrcChatSystem/ChatClientApp/Client/WindowsHelper.cs b/samples/IrcChatSystem/ChatClientApp/Client/WindowsHelper.cs
new file mode 100644
index 0000000..517bc1d
--- /dev/null
+++ b/samples/IrcChatSystem/ChatClientApp/Client/WindowsHelper.cs
@@ -0,0 +1,109 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Hik.Samples.Scs.IrcChat.Client
+{
+    /// <summary>
+    /// This class is used to flash window caption / taskbar button when a message received
+    /// and window is not active.
+    /// </summary>
+    public static class WindowsHelper
+    {
+        [DllImport("user32.dll")]
+        [return: MarshalAs(UnmanagedType.Bool)]
+        public static extern bool FlashWindowEx(ref FLASHWINFO pwfi);
+
+        [StructLayout(LayoutKind.Sequential)]
+        public 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 FlashWindowFlags dwFlags; //uint
+            /// <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;
+        }
+
+        public enum FlashWindowFlags : uint
+        {
+            /// <summary>
+            /// Stop flashing. The system restores the window to its original state.
+            /// </summary>
+            FLASHW_STOP = 0,
+
+            /// <summary>
+            /// Flash the window caption.
+            /// </summary>
+            FLASHW_CAPTION = 1,
+
+            /// <summary>
+            /// Flash the taskbar button.
+            /// </summary>
+            FLASHW_TRAY = 2,
+
+            /// <summary>
+            /// Flash both the window caption and taskbar button.
+            /// This is equivalent to setting the FLASHW_CAPTION | FLASHW_TRAY flags.
+            /// </summary>
+            FLASHW_ALL = 3,
+
+            /// <summary>
+            /// Flash continuously, until the FLASHW_STOP flag is set.
+            /// </summary>
+            FLASHW_TIMER = 4,
+
+            /// <summary>
+            /// Flash continuously until the window comes to the foreground.
+            /// </summary>
+            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;
+        }
+    }
+}