--- a/ServerMonitor/Win32Helpers.cs	Sun Sep 15 21:01:14 2019 -0400
+++ b/ServerMonitor/Win32Helpers.cs	Tue Jun 09 20:59:00 2020 -0400
@@ -22,7 +22,13 @@
         }
 
         public const int HWND_BROADCAST = 0xffff;
-        public static readonly int WM_SHOWMONITOR = RegisterWindowMessage("WM_SHOWMONITOR");
+
+        #if __MonoCS__
+            public static readonly int WM_SHOWMONITOR = -12345;
+        #else
+            public static readonly int WM_SHOWMONITOR = RegisterWindowMessage("WM_SHOWMONITOR");
+        #endif
+
         [DllImport("user32")]
         public static extern bool PostMessage(IntPtr hwnd, int msg, IntPtr wparam, IntPtr lparam);
         [DllImport("user32")]
@@ -32,7 +38,7 @@
         {
             /// <summary>
             /// Stop flashing. The system restores the window to its original state.
-            /// </summary>    
+            /// </summary>
             FLASHW_STOP = 0,
 
             /// <summary>
@@ -66,6 +72,10 @@
         /// <param name="form">The form to flash.</param>
         public static bool FlashWindowEx(Form form)
         {
+            if (Helpers.IsMono()) {
+                return false;
+            }
+
             IntPtr hWnd = form.Handle;
             FLASHWINFO fInfo = new FLASHWINFO();
 
@@ -82,6 +92,10 @@
         /// <param name="form">The form to stop flashing.</param>
         public static bool StopFlashWindowEx(Form form)
         {
+            if (Helpers.IsMono()) {
+                return false;
+            }
+
             IntPtr hWnd = form.Handle;
             FLASHWINFO fInfo = new FLASHWINFO();