All working, thanks for the advice.

Hello,

I have just realised my error. I was using an underscore within the __uuidof call i.e.

_EasyUAApplicationPtr easyAppPtr(__uuidof(_EasyUAApplication))

but using

_EasyUAApplicationPtr easyAppPtr(__uuidof(EasyUAApplication))

Creates the object. I'll look at adjusting the ApplicationName now.

Regards
Colin

Hello,

Unfortunately I still get the same "Class not registered" error after uninstalling 2022.2 and installing 2023.1 and rebuilding the C++ application.

I also tested and got the same error when adding the line to one of your examples ..\Examples-COM\CPP\VisualStudio\Win32\UADocExamples\_EasyUAClient\DiscoverLocalServers.Main.cpp

. . .
namespace _EasyUAClient
{
void DiscoverLocalServers::Main()
{
// Initialize the COM library
CoInitializeEx(NULL, COINIT_MULTITHREADED);
{
_EasyUAApplicationPtr easyAppPtr(__uuidof(_EasyUAApplication));
. . .

Should this work or should I use a different way to set the ApplicationName (or other certificate details) with C++/COM in 2023.1?

Regards
Colin

Hi,

Thanks for the quick response. Yes I can upgrade to 2023.1.

Regards
Colin

Hi,

I am working with an unmanaged C++ project and would like to be able to set the "ApplicationName" property. In C# it is done as follows:

// Set the application name, which determines the subject of the client certificate.
// Note that this only works once in each host process.
EasyUAApplication.Instance.ApplicationParameters.ApplicationManifest.ApplicationName = "QuickOPC - CSharp example application";

How can the global "EasyUAApplication" object be accessed using the C++ COM interfaces?

I tried to create an object as follows:

_EasyUAApplicationPtr easyAppPtr(__uuidof(_EasyUAApplication));

but this throws a "Class not registered" error.

I can access and use other QuickOPC objects, so the issue is just limited to the _EasyUAApplication class, so assume this is a special case. Can't find any examples.

I am Using QuickOPC 2022.2.

Regards
Colin