Roku Developer Program

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I have read over http://blog.roku.com/developer/2013/06/06/supporting-in-app-purchases-in-your-roku-brightscript-chan... but not sure where to begin to setup a pay-per-view channel. I realize on the developer's page is where the product information is added to create the "products."

The viewer should have 2 options, one to watch the trailer and the other to purchase for a set period of time. Any further information available on doing this and how the xml files should be coded or where this information can be located??

I have channels but none use the roChannelStore with Roku billing so curious to know and learn all I can on where to begin.

Any tips are appreciated.

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any 411?

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Can anyone give me a jump start on this?

EDIT:
I already have my categories. Wondering if I can use the coding I already have and change the "play" button on the detail screen to a "purchase" button and connect the purchase button to the roChannelStore so viewers can purchase the video or perhaps it is alot more complicated??

And, I need to add a "preview trailer" button to the same detailscreen.

I have a copy of the InAppPurchase zip file. Can someone provide some information on where to start?

Thank you.

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Can someone perhaps give some assistance as to how to modify an appDetailScreen to integrate an inAppPurchase? If you don't want to broadcast the info in the forum then PM me.

Some input would be nice.

I have the InApPurchase example. I have my channel down to the DetailScreen. On the DetailScreen I want to add a button for the one time purchase. Since I plan to use RokuBilling perhaps someone at Roku can offer some advise on this?

Thank you.

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I still need some info on this topic, please.