Hi,

I would like to open an standalone Excel JS Application as an action pane through my existing VBA Macro or VSTO Application Ribbon in same excel environment/file instead of new excel file.

Trying to explain in different way

I already have developed VSTO application which has got various ribbons, now I like to have standalone Excel JS application to be opened in that active excel sheet instead of popping new excel file.

Thanks,

Pawan