做excel插件开发，可能需要为excel添加自定义的工具栏。这个也是非常的简单的。

Public Class ConnectClass Connect

Implements Extensibility.IDTExtensibility2

Dim app As Excel.Application
Dim wb As Excel.Workbook
Dim ws As Excel.Worksheet
Dim addInInstance As Object


Dim pasteText As Microsoft.Office.Core.CommandBarButton ‘定义一个工具栏按钮



Public Sub OnBeginShutdown()Sub OnBeginShutdown(ByRef custom As System.Array) Implements Extensibility.IDTExtensibility2.OnBeginShutdown

End Sub

Public Sub OnAddInsUpdate()Sub OnAddInsUpdate(ByRef custom As System.Array) Implements Extensibility.IDTExtensibility2.OnAddInsUpdate

End Sub

Public Sub OnStartupComplete()Sub OnStartupComplete(ByRef custom As System.Array) Implements Extensibility.IDTExtensibility2.OnStartupComplete

Implements Extensibility.IDTExtensibility2.OnDisconnection

End Sub
Public Sub OnConnection()Sub OnConnection(ByVal application As Object, ByVal connectMode As Extensibility.ext_ConnectMode,

ByVal addInInst As Object, ByRef custom As System.Array)

Implements Extensibility.IDTExtensibility2.OnConnection
If TypeOf (application) Is Excel.Application Then app = CType(application, Excel.Application)

addInInstance = addInInst
wb = app.ActiveWorkbook
ws = CType(wb.ActiveSheet, Excel.Worksheet)

Dim toolbar As Microsoft.Office.Core.CommandBar = Nothing
If Not app Is Nothing Then
toolbar = AddToolbar(app, "专用工具栏") ’添加工具栏
End If

’ 建立按钮添加文本
pasteText = MakeANewButton(toolbar, "Insert text",

1044, AddressOf pasteText_Click) ’添加工具栏按钮并帮定事件
End Sub

’添加工具栏
Private Function AddToolbar()Function AddToolbar(ByVal ex As Excel.Application, _
ByVal toolbarName As String) As Microsoft.Office.Core.CommandBar
Dim toolBar As Microsoft.Office.Core.CommandBar = Nothing
Try
’ 为add-in建立一个命令条
toolBar = CType(ex.CommandBars.Add(toolbarName,

Microsoft.Office.Core.MsoBarPosition.msoBarTop, , True),

Microsoft.Office.Core.CommandBar)
toolBar.Visible = True
Return toolBar
Catch
Return Nothing
End Try
End Function

’在工具栏上添加一个按钮
Private Function MakeANewButton()Function MakeANewButton(ByVal commandBar As Microsoft.Office.Core.CommandBar, ByVal caption

As String, ByVal faceID As Integer, ByVal clickHandler As Microsoft.Office.

Core._CommandBarButtonEvents_ClickEventHandler) As Microsoft.Office.Core.CommandBarButton

Try
Dim newButton As Microsoft.Office.Core.CommandBarButton
newButton = CType(commandBar.Controls.Add(Microsoft.Office.Core.MsoControlType.msoControlButton), Microsoft.Office.Core.CommandBarButton)
newButton.Caption = caption
newButton.FaceId = faceID
AddHandler newButton.Click, clickHandler
Return newButton
Catch ex As System.Exception
Return Nothing
End Try
End Function

’点击工具条按钮时应该执行的程序
Public Sub pasteText_Click()Sub pasteText_Click(ByVal barButton As Microsoft.Office.Core.CommandBarButton, ByRef someBool As Boolean)
Dim text As String = ""
Dim data As System.Windows.Forms.IDataObject = System.Windows.Forms.Clipboard.GetDataObject()