That's good to know!
So basically it should work the same way as it is for web application, right?
I just need a WebBrowser control -> and load iframe in it, right?
If that's true, then I guess there is no need for a demo/sample specifically for Winforms (just mentioning that it is working the same way for Winforms while presenting it for web application should do the trick 
BTW. great stuff on youtube about power bi - keep on the good work!