let’s suppose I have installed one add-in in my outlook that is COM add-ins in this some API calls processing and also some window dialogue opening I want to develop my own add-in in VSTO technology to record the activity or capture the activity of the user that he is performing in already installed third-party add-in.
For example, he selects anything from the third-party task pane and calls any API or specially records the API call.

Please confirm if using VSTO technology or any other solution is possible.