Managed C++/CLI

You are declaring local executable statements outside functions which is incorrect. You should move then inside an appropriate function, probably main.

It's ok Richard, Thank Again for reply The following code clears my error() textBox10->Text = Convert::ToString(Decimal::Add(Decimal::Add(DJSubTot, DJVATTot), DJFreightTot));

Thank Richard

You should use "Remote Desktop" to dial into your friend's computer, do the "paste" thing, and then tell them what bozos they were for not following your instructions (assuming they work). "(I) am amazed to see myself here rather than there ... now rather than then". ― Blaise Pascal

Yeah I missed the lower case. (I'm getting old and losing my eye sight.) On an older version of Visual Studio you would need to parse __FUNCSIG__ with some preprocessor wizardry. This macro is only available inside the function. Visual Studio 2012 and above supports the latest C++11,C++14 Decltype and Call Expressions[^] version 1.1 You would use it like this: Callable Objects with different calling conventions[^] Best Wishes, -David Delaune

Do not repost! [How to programmatically add columns to wpf datagrid with MVVM? - .NET Framework Discussion Boards](https://www.codeproject.com/Messages/5485877/How-to-programmatically-add-columns-to-wpf-datagri.aspx)

See The C++ / CLI is for managed and mixed-mode C++ programming only - Managed C++/CLI Discussion Boards[^] and HOW TO ASK A QUESTION - C / C++ / MFC Discussion Boards[^]

Yes, you should be able to create a C++/CLI Assembly (DLL) which exposes functionality to C# via ref classes. Those managed classes can call into the C/C++ SDK to do the necessary work. Reference the C++/CLI assembly from your C# code and call into it... profit!