The first-ever PC Gaming Show at E3 this year has added another major partner to its lineup: Microsoft.

Event organizers announced today that Xbox boss Phil Spencer and other key members of the team will appear during the show to talk about gaming on Windows 10.

Writing on the Xbox Wire, Microsoft teased that it may also have a "surprise" in store for the event, though no other details were announced.

Microsoft is also co-sponsoring the PC Gaming Show alongside chip-maker AMD. The event, which will be livestreamed, will be held June 16 from 5-8 PM PDT. Other companies attending the event include Blizzard Entertainment, Square Enix, and Creative Assembly, among many others.

As for why Xbox is joining the PC Gaming Show, Spencer reiterated that Microsoft had lost its way with the PC gaming crowd in the past. He said attending the event will help show gamers that Microsoft is committed to PC gaming with the release of Windows 10 in July and beyond.

"For us, it's about kickstarting a more regular and open dialogue with the community so that we can collect feedback and share developments on what we are working on," he said. "Specifically, we'll share our vision for gaming on Windows 10 and why it's the best version of Windows ever for both gamers and developers alike."

"We have bold ambitions, but we also want to set expectations early and often as to what gamers and developers should expect," he added. "Also, we want to make clear that when we talk about Xbox going forward, we're talking about gaming on all Windows 10 devices--PCs, tablets, phones, Xbox One, and HoloLens. And we'll talk about some of the games we have coming to the PC this year."

Be sure to read PC Gamer's full interview with Spencer for lots more. It's an excellent read well worth your time if you're looking to learn more about Microsoft's stance on PC gaming.

For more on E3 2015, check out GameSpot's roundup of the dates and times for all the briefings.