更新:2007 年 11 月
| 适用对象 | 
|---|
| 本主题中的信息仅适用于指定的 Visual Studio Tools for Office 项目和 Microsoft Office 版本。 项目类型 
 Microsoft Office 版本 
 有关更多信息,请参见按应用程序和项目类型提供的功能。 | 
此示例在 Microsoft Office Outlook 中创建一个工具栏。这个包含两个按钮的工具栏将出现在应用程序的顶部。单击按钮时,代码会显示一条显示按钮标题的消息。
示例
Dim newToolBar As Office.CommandBar
Dim firstButton As Office.CommandBarButton
Dim secondButton As Office.CommandBarButton
Dim selectExplorers As Outlook.Explorers
Private Sub ThisAddIn_Startup(ByVal sender As Object, _
        ByVal e As System.EventArgs) Handles Me.Startup
    selectExplorers = Me.Application.Explorers()
    AddHandler selectExplorers.NewExplorer, AddressOf _
        Me.NewExplorer_Event
    AddToolbar()
End Sub
Private Sub NewExplorer_Event(ByVal new_Explorer _
    As Outlook.Explorer)
    new_Explorer.Activate()
    newToolBar = Nothing
    Call Me.AddToolbar()
End Sub
Private Sub AddToolbar()
    Dim button_1 As Office.CommandBarButton
    Dim button_2 As Office.CommandBarButton
    If newToolBar Is Nothing Then
        Dim cmdBars As Office.CommandBars = _
            Me.Application.ActiveExplorer().CommandBars
        newToolBar = cmdBars.Add("NewToolBar", _
            Office.MsoBarPosition.msoBarTop, False, True)
    End If
    Try
        button_1 = CType(newToolBar.Controls.Add(1),  _
            Office.CommandBarButton)
        With button_1
            .Style = Office.MsoButtonStyle.msoButtonCaption
            .Caption = "Button 1"
            .Tag = "Button1"
        End With
        If Me.firstButton Is Nothing Then
            Me.firstButton = button_1
            AddHandler firstButton.Click, AddressOf ButtonClick
        End If
        button_2 = CType(newToolBar.Controls.Add(1),  _
            Office.CommandBarButton)
        With button_2
            .Style = Office.MsoButtonStyle.msoButtonCaption
            .Caption = "Button 2"
            .Tag = "Button2"
        End With
        If Me.secondButton Is Nothing Then
            Me.secondButton = button_2
            AddHandler secondButton.Click, AddressOf ButtonClick
        End If
        newToolBar.Visible = True
    Catch ex As Exception
        MessageBox.Show(ex.Message)
    End Try
End Sub
Private Sub ButtonClick(ByVal ctrl As Office.CommandBarButton, _
        ByRef Cancel As Boolean)
    MessageBox.Show("You clicked: " + ctrl.Caption)
End Sub
Office.CommandBar newToolBar;
Office.CommandBarButton firstButton;
Office.CommandBarButton secondButton;
Outlook.Explorers selectExplorers;
private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
    selectExplorers = this.Application.Explorers;
    selectExplorers.NewExplorer +=new Outlook
        .ExplorersEvents_NewExplorerEventHandler(newExplorer_Event);
    AddToolbar();
}
private void newExplorer_Event(Outlook.Explorer new_Explorer)
{
    ((Outlook._Explorer)new_Explorer).Activate();
    newToolBar = null;
    AddToolbar();
}
private void AddToolbar()
{
    if (newToolBar == null)
    {
        Office.CommandBars cmdBars = 
            this.Application.ActiveExplorer().CommandBars;
        newToolBar = cmdBars.Add("NewToolBar", 
            Office.MsoBarPosition.msoBarTop, false, true);
    }
    try
    {
        Office.CommandBarButton button_1 = 
            (Office.CommandBarButton)newToolBar.Controls
            .Add(1, missing, missing, missing, missing);
        button_1.Style = Office
            .MsoButtonStyle.msoButtonCaption;
        button_1.Caption = "Button 1";
        button_1.Tag = "Button1";
        if (this.firstButton == null)
        {
            this.firstButton = button_1;
            firstButton.Click += new Office.
                _CommandBarButtonEvents_ClickEventHandler
                (ButtonClick);
        }
        Office.CommandBarButton button_2 = (Office
            .CommandBarButton)newToolBar.Controls.Add
            (1, missing, missing, missing, missing);
        button_2.Style = Office
            .MsoButtonStyle.msoButtonCaption;
        button_2.Caption = "Button 2";
        button_2.Tag = "Button2";
        newToolBar.Visible = true;
        if (this.secondButton == null)
        {
            this.secondButton = button_2;
            secondButton.Click += new Office.
                _CommandBarButtonEvents_ClickEventHandler
                (ButtonClick);
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}
private void ButtonClick(Office.CommandBarButton ctrl,
        ref bool cancel)
{
    MessageBox.Show("You clicked: " + ctrl.Caption);
}
可靠编程
在类级别上声明命令栏变量。如果在方法内部声明这些变量,则变量将在此方法运行完以后超出范围,垃圾回收器将可以重新分配内存。