Integrate Office365 web apps with legacy windows application

Question

In our legacy windows desktop application written in C/C++ we allow the users to have result from reports displayed in Word or Excel. For Word the result are written to a RTF document and DDE are used to make Word open the file. For Excel we use DDE to create an empty sheet and POKE the data into the columns.
In order for this to work, the users need a locally installed Office365.

We want to be able to allow our users to use the Office365 web apps, and at first glance the WOPI looked like an API to use. When exploring the WOPI further, it seems to me that it is an API to use if I would take care of storage, not a API to integrate to the web apps.

My question is then if there are an API to use to allow a desktop application to authenticate the user and ask the O365 web apps to open/display/store a local file?

Answer 1

Hi @Trygve Liland

Welcome to Q&A forum ~

But your issues are more related to Microsoft 365 development which are out of our support scope.

To help you better, I would suggest you post a new thread on following forums.
Office developer community

Thanks for your understanding.

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