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I have a C# WPF User Control. I want to load that on C++ MFC Dialog.
But the catch is, I do not want to use ActiveX Control.
I want the C# WPF User Control to be COM component and that COM component should be loaded on my other C++ MFC Dialog.

How can this be achieved?

What I have tried:

I created one C# WPF User Control as:
public partial class UserControl1 : UserControl
//My User Control code

Registered it using RegAsm.exe <mycsharpwpfusercontroldllname> /codebase /tlb and got the .TLB file out of it.

Later in my C++ MFC Dialog I imported that .TLB file and following is the OnInitDialog of my MFC Dialog.

virtual BOOL OnInitDialog() override

    // Initialize COM

    // Create an instance of the UserControl
    HRESULT hr = m_spUserControl.CreateInstance(__uuidof(UserControl1));
    if (SUCCEEDED(hr))
        // Get the window handle of the UserControl using the GetHandle method
        HWND hWndUserControl = m_spUserControl->GetHandle();

        // Embed the UserControl in the MFC dialog
        CWnd* pWnd = GetDlgItem(IDC_STATIC_USERCONTROL);

    return TRUE;

But some how the above thing is not working.
My MFC dialog application is crashing. I tried to debug, but it is not providing any proper information.
Gerry Schmitz 24-Nov-23 12:27pm
Andre Oosthuizen 24-Nov-23 13:38pm    
Should be the answer Gerry, with minor explanations... Will get my +5
Saurabh Ashtaputre 26-Nov-23 13:03pm    
But I want my C# WPF User Controls to be COM components.
Does this work in that case?

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