Hello Pranav，

VSTO提供了两种创建自定义UI（Fluent UI）的主要方法：

1.  演练：使用功能区设计器创建自定义选项卡

2.  演练：使用功能区XML创建自定义选项卡

我你的控件的回调，你可以pa修改用于创建新MailItem对象的代码。

显示MailItem类的方法di 展开新的  检查员  对象为物品
。

您可以在以下系列文章中阅读有关Fluent UI（又名Ribbon UI）的更多信息：

为开发人员自定义2007 Office Fluent功能区（第1部分，共3部分）

为开发人员自定义2007 Office Fluent功能区（第2部分，共3部分）

为开发人员自定义2007 Office Fluent功能区（第3部分，共3部分）

如果您需要更换内置控件操作，可以考虑重新调整内置控件，请参阅  Office Fluent
功能区上的临时重新调整命令 以获取更多信息。   

Hi, 
 I am looking to create a few ribbons in C# using VSTO which when pressed creates a new email object with predefined recipient address. I am able to create a custom email in the add in but this just replaces the existing create new email button in Outlook. How do I ensure that these custom create new email buttons are added to the ribbons created?

 Any help would be appreciated, I have followed these links so far

https://msdn.microsoft.com/en-us/library/ms269113.aspx
https://msdn.microsoft.com/en-us/library/bb386104.aspx

Thanks
Pranav 

Hello Pranav,

VSTO provides two main ways for creating a custom UI (Fluent UI):

1. Walkthrough: Creating a Custom Tab by Using the Ribbon Designer

2. Walkthrough: Creating a Custom Tab by Using Ribbon XML

In the callback of your controls, you may paste the code for creating a new MailItem object. The Display method of the MailItem class displays a new Inspector object for the item.

You can read more about the Fluent UI (aka Ribbon UI) in the following series of articles:

Customizing the 2007 Office Fluent Ribbon for Developers (Part 1 of 3)

Customizing the 2007 Office Fluent Ribbon for Developers (Part 2 of 3)

Customizing the 2007 Office Fluent Ribbon for Developers (Part 3 of 3)

In case you need to replace the built-in control action, you may consider repurposing built-in controls, see Temporarily Repurpose Commands on the Office Fluent Ribbon for more information.