重要: 此函数已被替换为一个或多个新函数，这些函数可提供更高的精确度，其名称更好地反映其用法。虽然此函数仍可向后兼容，但您应该考虑从现在开始使用新函数，因为此函数在 Excel 的将来版本中可能不再可用。

Learn how to tell if your Office software is genuine. To help determine if your Microsoft software is genuine, go to our How to Tell site for more information. Here you'll learn about authentic packaging, including what to look for with product key labels, and Certificate of Authenticity (COA), how to report counterfeit software, and find out what your shopping and licensing options are.

Tip: If you encounter a problem on your Windows device, pressing the Windows logo key + F takes a screenshot, then opens the Feedback Hub app and automatically uploads the screenshot to the Feedback tab. Follow the on-screen instructions to detail the problem you've encountered.

Get in touch with Microsoft Support for assistance with Microsoft products and services.

Hotmail เปลี่ยนชื่อเป็น Outlook.com แล้ว เรียนรู้วิธีการลงชื่อเข้าใช้เพื่อเข้าถึงบัญชีอีเมล Outlook.com, Hotmail, Live หรือ MSN ของคุณ

In PowerPoint 2016, you can insert an online video with an embed code or search for a video by name. Then you can play it during your presentation.

A guide to help you identify and access your Microsoft account. How to check if your email is a Microsoft account? Go to the Microsoft account sign-in page at https://account.microsoft.com and enter your email address.

Refunds are typically issued for requests meeting the following criteria: Requests are made within 14 days of the purchase date; Requests are for games in which you haven’t accumulated a significant amount of play time

Members in a family group can only view their own enforcements. Case reviews for enforcements on child accounts must be submitted by an organiser in the same family group.

Find PowerPoint help and training from Microsoft. Get answers to your questions, and learn from how-to articles and training videos for PowerPoint.