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Asked: 2026-05-11T11:14:55+00:00

I have a Windows form user control that is made COM visible. Now I

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I have a Windows form user control that is made COM visible. Now I want to embed that control into an ATL dialog GUI.

The ATL project (unmanaged C++) shall only get the progID of the winform and dynamically create and embed it at runtime.

Is this possible and if so, how do I do it?

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  1. I figured out a way to get it to work.
    The following code is using a CWnd called m_Control that is made to host a winform via a little documented version of CreateControl. Seems to work fine so far. If anyone sees any drawbacks, please comment or respond.

    AfxEnableControlContainer(); Microsoft::VisualC::MFC::CControlCreationInfoEx i; i.Init(System::Type::GetTypeFromProgID(gcnew System::String(sProgID)),        CControlCreationInfo::ReflectionType); i.m_clsid = CLSID_WinFormsControl; POINT pt; pt.x = pt.y = 0; SIZE sz; sz.cx = sz.cy = 100; m_Control.CreateControl(i, WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN,                         &pt, &sz, CWnd::FromHandle(m_hWnd), ID_CONTROL);
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