Issues with RequestPurchaseAsync in MFC C++ Application

Ming Yu 20

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 20 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 12,001 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 20 Reputation points

2024-10-18T15:51:21.07+00:00
Thank you very much for your help. I have followed the instructions in (https://learn.microsoft.com/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 12,001 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
Ming Yu 20 Reputation points

2024-10-23T15:22:39.74+00:00
Thank you very much for your help.

It seems to me that https://github.com/microsoft/Windows-universal-samples/blob/main/Samples/Store is a universal windows application, and mine is a MFC application and an universal windows component. Is this the reason for the difficulty?

I have tried both shobjidl.h and shobjidl_core.h. Including either one in my Class1.cpp leads to the same error messages. Again, thank you very much.
Ming Yu 20 Reputation points

2024-10-23T17:52:41.8533333+00:00
I did another experiment to test if my addon is in the Store. A new method, bool FindAddons(), was introduced in Class1. It is implemented as

bool Class1::FindAddons()

{

Windows::Services::Store::StoreContext^ storeContext; storeContext = StoreContext::GetDefault(); auto filterList = ref new Vector<String^>({ "Consumable" ,"Durable", "Subscription", "UnmanagedConsumable" }); create_task(storeContext->GetAssociatedStoreProductsAsync(filterList)).then([](StoreProductQueryResult^ addOns) { return true; }, task_continuation_context::get_current_winrt_context()); return false;

}

Now, the method returns false. I am expecting that it returns true, because an addon has been submitted for the APP. What mistakes could be causing this issue? Thank you very much.
Minxin Yu 12,001 Reputation points Microsoft Vendor

2024-10-25T01:25:06.7933333+00:00

As I said above：

must configure the StoreContext object to specify which application window is the owner window for modal dialogs that are shown by the object.

shobjidl_core.h is for desktop apps only and cannot be used in uwp project

Accepted answer

Minxin Yu 12,001 Reputation points Microsoft Vendor

2024-10-25T07:01:48.1133333+00:00
Hi，

set desktop app and specific HWND:

<AppContainerApplication>false</AppContainerApplication>

<GenerateWindowsMetadata>true</GenerateWindowsMetadata>

WindowsRuntimeComponent1::Class1::Purchase () { Windows::Services::Store::StoreContext^ storeContext; storeContext = Windows::Services::Store::StoreContext::GetDefault (); HWND hwnd = GetActiveWindow (); IInitializeWithWindow* initWindow = nullptr; HRESULT hr = reinterpret_cast<IUnknown*>(storeContext)->QueryInterface (IID_PPV_ARGS (&initWindow)); if (SUCCEEDED (hr) ) { initWindow->Initialize (hwnd); create_task (storeContext->RequestPurchaseAsync ("myAddonStoreID")).then ([](StorePurchaseResult^ result) { // ....... }, task_continuation_context::get_current_winrt_context ()); initWindow->Release (); } }

Best regards,

Minxin Yu

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1 person found this answer helpful.
Ming Yu 20 Reputation points

2024-10-25T15:40:38.5866667+00:00

Thank you very much for your help. Please advise where should the two lines of codes

<AppContainerApplication>false</AppContainerApplication>

<GenerateWindowsMetadata>true</GenerateWindowsMetadata>

be added to?

After I tried to add the two lines to WindowsRuntimeComponent1.vcxproj manually, "Reload Project" failed. Do I miss something? Again, thank you very much.

Minxin Yu 12,001 Reputation points Microsoft Vendor

2024-10-28T01:13:15.63+00:00

1.Replace existing <AppContainerApplication>true</AppContainerApplication> with <AppContainerApplication>false</AppContainerApplication> in vcxproj instead of add it.

2.Then open project, properties-> linker, set Generate WindowsMetadata: Yes.
3.Project-> C/C++: consume Windows Runtime extension: /ZW

/ZW (Windows Runtime Compilation)

Ming Yu 20 Reputation points

2024-10-28T15:48:22.6766667+00:00

Thank you very much for your patience. I have followed your instructions of Oct 27. All the three steps work very well for me.

Then I implemented your instructions of Oct 25. My code now looks like.

When building the project, I get the following error messages.

This is the details of the 4th error message.

Have I missed something? Again, thank you very much for your help.

Minxin Yu 12,001 Reputation points Microsoft Vendor

2024-10-29T01:10:32.27+00:00

Did you include shobjidl.h?

Ming Yu 20 Reputation points

2024-10-29T04:33:15.6066667+00:00

No, I did not. After including the header file, I have no compile errors anymore. The issue is resolved. Now "RequestPurchaseAsync" is giving exactly what I expected. Thank you very much.
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