how to add a button in MS word ribbon using c#

Hi Uday,

To add your application to word control, you have to create add-ins. To create word add in projects, please refer the below steps

Start -> Visual Studio -> New Project -> Office -> Word 2007 add-in.

Please refer the below URL for your reference.

http://www.c-sharpcorner.com/UploadFile/kbpatel/how-to-create-add-ins-using-vsto-in-ms-word/

After creating a project , you will get one Ribbon.cs. In that add a simple button and add your export pdf logics there. Then deploy and install it in your machine. Open MSWord. You fill find your addin there.