Issues with RequestPurchaseAsync in MFC C++ Application

Ming Yu 0

An app has been published in the Partner Center, and an addon submission has been created. This is the addon subscription overview.

User's image

In the application, there is an MFC project and a Windows Runtime Component (Universal Windows) project, as depicted below.

User's image

The Class1 is declared as follows:

namespace WindowsRuntimeComponent1
{
    public ref class Class1 sealed
    {
    public:
        Class1();
        int Purchase();
    };
}

The method Purchase() is implemented as:

int Class1::Purchase()
{
    Windows::Services::Store::StoreContext^ storeContext;
    storeContext = StoreContext::GetDefault();    

    create_task(storeContext->RequestPurchaseAsync("myAddonStoreID")).then([](StorePurchaseResult^ result)
    {
        // .......
    }, task_continuation_context::get_current_winrt_context());
}

The program crashes at the line:

create_task(storeContext->RequestPurchaseAsync("myAddonStoreID")).then([](StorePurchaseResult^ result)

What mistakes could be causing this issue? Thank you very much.

Ming Yu 0 Reputation points

2024-10-18T02:40:25.68+00:00

My free app offers in-app purchases of subscription add-ons to customers.
Minxin Yu 11,756 Reputation points Microsoft Vendor

2024-10-18T07:39:10.6266667+00:00

From the doc:
if you have a Win32 desktop application or a desktop application that has a window handle (HWND) that is associated with the rendering framework (such as a WPF or Windows App SDK application), your application must configure the StoreContext object to specify which application window is the owner window for modal dialogs that are shown by the object.
Ming Yu 0 Reputation points

2024-10-18T15:51:21.07+00:00
Thank you very much for your help. I have followed the instructions in (https://zcusa.951200.xyz/en-us/windows/uwp/monetize/in-app-purchases-and-trials#desktop):

"Add a reference to the shobjidl.h header file in the code."

"Get a StoreContext object by using the GetDefault method, ... and cast this object to an IInitializeWithWindow object. Then, call the IInitializeWithWindow.Initialize method." Now, my Class1.cpp looks like: #include "shobjidl.h" int Class1::Purchase() {
Windows::Services::Store::StoreContext^ storeContext; storeContext = StoreContext::GetDefault(); IInitializeWithWindow initWindow = (IInitializeWithWindow)(object)storeContext;
}

However, when building the component project, I get the following error messages:

What mistakes could be causing this issue? Again, thank you very much.
Minxin Yu 11,756 Reputation points Microsoft Vendor

2024-10-21T01:52:20.3066667+00:00

For complete C++ sample, please see:

https://github.com/microsoft/Windows-universal-samples/blob/main/Samples/Store/cpp/Scenario2_InAppPurchase.xaml.cpp#L48

Update:
shobjidl_core.h is for desktop apps only, but your project targets UWP.

For classes that implement IDataTransferManagerInterop

The Windows.ApplicationModel.DataTransfer.DataTransferManager class implements the IDataTransferManagerInterop interface (which, like IInitializeWithWindow, lets you set an owner window).

WinUI 3 with C++

The sample above is for default winui3 project

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Issues with RequestPurchaseAsync in MFC C++ Application

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