Added the ExcelDna.Interop NuGet package and added a command example to the VB project template.

Author: Sergey-Vlasov

ExcelDNAVSExtension/VBProjectTemplate/MyCommands.vb

@@ -0,0 +1,32 @@
+Imports ExcelDna.Integration
+Imports Microsoft.Office.Interop.Excel
+
+Public Module MyCommands
+    ' We make a command macro that can be run by:
+    ' * Pressing the quick menu under the Add-ins tab
+    ' * Pressing the shortcut key Ctrl + Shift + D
+    ' * Typing the name into the Alt+F8 Macro dialog (add-in macros won't we shown on this list, though)
+    <ExcelCommand(MenuName:="$projectname$", MenuText:="Dump Data", ShortCut:="^D")>
+    Public Sub DumpData()
+        ' We always get the root Application object with a call to ExcelDnaUtil.Application
+        ' If we reference both Window Forms, and the Excel interop assemblies, 
+        ' we need to be a bit careful about which 'Application' we mean.
+        Dim app As Application = CType(ExcelDnaUtil.Application, Application)
+        Dim newBook = app.Workbooks.Add()
+
+        ' While .NET arrays and collections are 0-based,
+        ' COM collections like Workbook.Sheets are 1-based.
+        ' We could also say newBook.Sheets["Sheet1"].
+        Dim targetRange As Range = newBook.Sheets(1).Range("A1:C2")
+
+        ' Set values to a range as a 2D object[,] array.
+        Dim newValues As Object(,) = New Object(,) {
+        {"One", 2, "Three"},
+        {True, Date.Now, ""}}
+        targetRange.Value = newValues
+
+        ' Apply some formatting, so that the time is displayed correctly
+        Dim dateCell As Range = targetRange.Cells(2, 2)
+        dateCell.NumberFormat = "hh:mm:ss"
+    End Sub
+End Module

ExcelDNAVSExtension/VBProjectTemplate/ProjectTemplate.vbproj

@@ -66,6 +66,7 @@ $endif$
 
   <ItemGroup>
     <Compile Include="MyFunctions.vb"/>
+    <Compile Include="MyCommands.vb"/>
     <Compile Include="My Project\AssemblyInfo.vb"/>
     <Compile Include="My Project\Application.Designer.vb">
       <AutoGen>True</AutoGen>

ExcelDNAVSExtension/VBProjectTemplate/VBProjectTemplate.vbproj

@@ -67,6 +67,7 @@
   <ItemGroup>
     <Compile Include="My Project\AssemblyInfo.vb" />
     <None Include="MyRibbon.vb" />
+    <None Include="MyCommands.vb" />
     <Compile Include="Settings1.Designer.vb">
       <AutoGen>True</AutoGen>
       <DesignTimeSharedInput>True</DesignTimeSharedInput>

ExcelDNAVSExtension/VBProjectTemplate/VBProjectTemplate.vstemplate

@@ -19,6 +19,7 @@
   <TemplateContent>
     <Project File="ProjectTemplate.vbproj" ReplaceParameters="true">
       <ProjectItem ReplaceParameters="true" OpenInEditor="true" OpenOrder="10">MyFunctions.vb</ProjectItem>
+      <ProjectItem ReplaceParameters="true">MyCommands.vb</ProjectItem>
       <ProjectItem ReplaceParameters="true">MyRibbon.vb</ProjectItem>
       <ProjectItem ReplaceParameters="true" TargetFileName="RibbonResources\Ribbon.xml">Ribbon.xml</ProjectItem>
       <ProjectItem TargetFileName="RibbonResources\Image1.png">Image1.png</ProjectItem>
@@ -44,6 +45,7 @@
     <packages repository="extension" repositoryId="f1b3b55f-9bdc-4e9a-802c-84b329e36587">
       <package id="ExcelDna.Integration" version="1.1.0" />
       <package id="ExcelDna.AddIn" version="1.1.1" />
+      <package id="ExcelDna.Interop" version="14.0.1" />
     </packages>
   </WizardData>
 </VSTemplate>