[C2/C3] Improve Windows Store plugin for supporting IAP in project with Xbox Live integrations

- Problem Description -

My game was approved for IDdxo@Xbox program and now I'm integrating the achievements into game. But I found a problem with C2 IAP's - they do not work. IAP works if Test mode is "on" but not working in published game. Apparently for applications with Xbox Live we need to use a other namespace for purchases, that's what I found in the documentation:

docs.microsoft.com/en-us/uwp/api/windows.applicationmodel.store

At the moment, my game is in Xbox Creators Program, and purchases also do not work. I didn't know about it, but the players told me about this issue. Before Xbox Live was added IAP worked flawlessly.

- Attach a Capx -

Any project with Xbox live integration for Xbox Creators Program or IDsrk@Xbox.

- Steps to Reproduce Bug -

Step 1 - Export project from C2 with IAP plugin (or Windows Store plugin) and Xbox Live plugin as UWP and open in Visual Studio 2017.

Step 2 - Build app package and publish on Microsoft Dev Center.

Step 3 - Launch app and try to purchase IAP.

- Observed Result -

No response from purchasing.

- Expected Result -

A window for confirming of purchase appears.

- Affected Browsers -

Chrome: (NO)

FireFox: (NO)

Internet Explorer: (NO)

Visual Studio: (YES)

- Operating System and Service Pack -

Windows 10 version 1803

- Construct 2 Version ID -

r262 64bit

Hi

As a temporary solution, I managed to implement the purchase by running this js code using the Valerypopoff Javascript plugin:

-> On touched purchase button: Execute js code:

	var StorePurchaseStatus = Windows.Services.Store.StorePurchaseStatus;
 var storeContext = Windows.Services.Store.StoreContext.getDefault();

storeContext.requestPurchaseAsync(#0).done(function (result) {
 if (result.extendedError) {
 SdkSample.reportExtendedError(result.extendedError);
 return;
 }

 switch (result.status) {
 case StorePurchaseStatus.alreadyPurchased:
 c2_callFunction(#1, []);

 case StorePurchaseStatus.succeeded:
 c2_callFunction(#2, []);

 case StorePurchaseStatus.notPurchased:
 c2_callFunction(#3, []);

 case StorePurchaseStatus.networkError:
 c2_callFunction(#3, []);

 case StorePurchaseStatus.serverError:
 c2_callFunction(#3, []);

 default:
 c2_callFunction(#3, []);
 }
 });