The SDK is available as a Windows Runtime Component for Store developers, allowing it to be used by apps written in a variety of languages. Phone developers can make use of the PayPal Checkout SDK for Windows 8 Phone that is available as a Portable Class Library.
Getting StartedStep 1: Configure Your PayPal AccountThe SDK processes PayPal transactions through a PayPal Premier or Business account which you'll configure to allow our Merchant account to process Express Checkout transactions on your behalf. This allows simple integration while protecting your API credentials from being exposed.
To grant permissions:
- Log into your PayPal merchant account.
- Navigate to Profile > My Selling Tools and click API Access > Update.
- Click Option 1: Grant API Permission
- Look up the account windowsstore_api1.paypal.com (ormswin_1352404208_biz_api1.paypal.com for a Sandbox account)
- Once the account is location, check both Use Express Checkout to process payments and Use Express Checkout to process mobile payments, then click OK.
For more information on granting third-party permissions, refer to the following guides:
- How to Request Third-Party Permissions Using the Permissions Service
- About the PayPal Permissions Service
Step 2: Include the Store/Phone SDK as a reference in your project
- In Solution Explorer, right-click References and select Add Reference.
- Browse to the PayPal Store/Phone library as per your need and click OK.
Documentation:
https://developer.paypal.com/webapps/developer/docs/classic/windows-8-checkout-sdk/gs_win8xo/