Unmanaged MFC calls WPF controls

Unmanaged MFC/ActiveX calls WPF controls

Using WPF as usercontrol ------> WPF. dll

public partial class WPFUserControl : UserControl{     public WPFUserControl()      {            InitializeComponent();     }}

Winform usercontrol contains WPF. dll made into COM components ----------> WF. dll and WF. TLB

1) Check winform project properties --> Application --> assembly information --> make assembly com-visible.

2) Check the project properties --> build --> Register for com InterOP.

3) reference the reference used by the WPF project. The focus is to reference the windowsformsintergeration library.

4) reference the project WPF

[InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIDispatch),ComVisibleAttribute(true)]public interface IWfUserCtrl{     [DispId(1)]     bool setWindow(int width,int height);}[ComVisible(true), ClassInterface(ClassInterfaceType.None),  ProgId("IWfUserCtrl.1")]public partial class WfContrastAgentGridCtrl : UserControl, IWfUserCtrl{     private WPFUserControl m_wpfUserCtrl;     public WfContrastAgentGridCtrl()      {            InitializeComponent();            //Add WPF control inside Winform            ElementHost elementHost = new ElementHost();            m_wpfUserCtrl= new WPFUserControl ();            elementHost.Child = m_wpfUserCtrl;            elementHost.Dock = DockStyle.Fill;            this.Controls.Add(elementHost);     }          public bool setWindow(int width,int height)     {            return true;     }}

Use MFC to call the COM component TLB and run the COM component DLL

1)regasm.exe com. dll

2) # import "com. TLB" no_namespace

3) used in oninitdialog () of the DLG class

#define ID_VIEW_GRIDCTRL  111const CString cstrlProgID(_T("IWfUserCtrl.1"));class Dlg{      private:           IWfUserCtrl * m_pUserCtrl;           CWnd * m_WfWnd;      protected:           virtual BOOL OnInitDialog();;}BOOL Dlg::OnInitDialog() {        BOOL locStat = FALSE;        m_WfWnd= new CWnd();        if (m_WfWnd== NULL)        {            cout<<"Create m_WfWnd failed"<<endl;        }                        locStat = m_WfContrastAgentWnd->CreateControl(cstrlProgID,_T("IWfUserCtrl"),            WS_CHILD | WS_VISIBLE, CRect(10,10,400,800),this,ID_VIEW_GRIDCTRL);        if (!locStat)        {            cout<<"locStat is false"<<endl;        }        else        {            cout<<"locStat is true"<<endl;        }                LPUNKNOWN pUnknown = m_WfContrastAgentWnd->GetControlUnknown();                LPVOID pCSInterface = NULL;        HRESULT hr = pUnknown->QueryInterface(__uuidof(IWfContrastAgentGridCtrl),(void **)&pCSInterface);        if (hr != S_OK)        {            cout<<"HRESULT hr is failed!"<<endl;        }        else        {            cout<<"hr == S_OK"<<endl;            m_pUserCtrl= (IWfUserCtrl*)pCSInterface;       }}

For details, see the code