MS Word插件，添加一个右键单击所选文本时弹出的按钮

 Microsoft.Office.Core.CommandBar cb = this.Application.CommandBars["Text"];

 Office.CommandBarControl newButton = cb.Controls.Add(Office.MsoControlType.msoControlButton, missing, missing, missing, missing);  
 newButton.Caption = "Test";
 newButton.Visible = true;
 newButton.Enabled = true;

Microsoft.Office.Core.CommandBar cellbar = diff.CommandBars["Text"];
Microsoft.Office.Core.CommandBarButton button = (Microsoft.Office.Core.CommandBarButton)cellbar.FindControl(Microsoft.Office.Core.MsoControlType.msoControlButton, 0, "MYRIGHTCLICKMENU", Missing.Value, Missing.Value);
if (button == null)
{
   // add the button
   button = (Microsoft.Office.Core.CommandBarButton)cellbar.Controls.Add(Microsoft.Office.Core.MsoControlType.msoControlButton, Missing.Value, Missing.Value, cellbar.Controls.Count + 1, true);
   button.Caption = "My Right Click Menu Item";
   button.BeginGroup = true;
   button.Tag = "MYRIGHTCLICKMENU";
   button.Click += new Microsoft.Office.Core._CommandBarButtonEvents_ClickEventHandler(MyButton_Click);
}