WPF Add ActiveX Control--system.windows.forms.axhost+invalidactivexstateexception exception

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I. ActiveX and its related concepts

(Component object model, Object component model), DCOM (Distributed COM, distributed object Component model), CORBA (Common object Request Broker Architecture, public Object Request Broker architecture), Dynamic Data Exchange (Exchange,dde), which solves the data update, but the data format is still a problem; objects are linked and embedded (object linking and Embedded,ole), Data exchange increases to "object Exchange"; ActiveX refers to loosely defined, COM-based technology collections, while OLE still refers only to compound documents; The biggest difference between ActiveX and OLE is that OLE is for integration between applications and files on the desktop, and ActiveX provides further web-based applications and user interaction. Second, WPF joins ActiveX controls

Use the windowsformshost element to place a Windows forms control into a WPF element or page.

To host a WPF element in a Windows forms control or form, use the ElementHost control

1. Add Reference windowsformsintegration; 2. Create WindowsFormsHost Object

System.Windows.Forms.Integration.WindowsFormsHost host = new System.Windows.Forms.Integration.WindowsFormsHost ();

3. Instantiate ActiveX controls, initialize controls, control complex values to host

TXSL1 = new ActiveX ();

Host. Child = TXSL1;

4. Add the Host object to the WPF form

THIS.MAINGRID.CHILDREN.ADD (host);

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WPF Add ActiveX Control--system.windows.forms.axhost+invalidactivexstateexception exception