[Task] Add menu button and show message

src/EasyEPlanner.csproj

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -121,6 +121,7 @@
     <Compile Include="Main\ImportIcpCreateRenamingMap.cs" />
     <Compile Include="Main\ImportIcpWagoProject.cs" />
     <Compile Include="Main\ModifyIcpChbase.cs" />
+    <Compile Include="Main\ShowMessageBox.cs" />
     <Compile Include="ProjectImportICP\BindingImporter.cs" />
     <Compile Include="ProjectImportICP\DeviceNameMatchingSaver.cs" />
     <Compile Include="ProjectImportICP\DevicesImporter.cs" />

src/Main/AddInModule.cs

@@ -1,3 +1,4 @@
+using EasyEPlanner.Main;
 using Eplan.EplApi.ApplicationFramework;
 using Eplan.EplApi.Starter;
 using System;
@@ -95,6 +96,9 @@ public bool OnInitGui()
             menuID = oMenu.AddMenuItem("О дополнении", "AboutProgramm", "", 
                 menuID, 1, false, false);
 
+            menuID = oMenu.AddMenuItem("Новая кнопка", nameof(ShowMessageBox), "",
+                menuID, 1, false, false);
+
             ProjectManager.GetInstance().Init();
 
             return true;

src/Main/ShowMessageBox.cs

@@ -0,0 +1,28 @@
+using Eplan.EplApi.ApplicationFramework;
+using System.Windows.Forms;
+
+namespace EasyEPlanner.Main
+{
+    class ShowMessageBox : IEplAction
+    {
+        ~ShowMessageBox() { }
+
+        public bool Execute(ActionCallingContext oActionCallingContext)
+        {
+            MessageBox.Show("Кнопка меню нажата", "MB");
+            return true;
+        }
+
+
+        public bool OnRegister(ref string Name, ref int Ordinal)
+        {
+            Name = nameof(ShowMessageBox);
+
+            return true;
+        }
+
+        public void GetActionProperties(ref ActionProperties actionProperties)
+        {
+        }
+    }
+}