Using the MontiVision Smart ActiveX Control with Visual C++ 2002-2005

To include the MontiVision Smart Control in your own Visual C++ application, use the following steps.

1. Step

Create your application framework with the application wizard form. Make sure that the "ActiveX Controls" checkbox is selected.

2. Step

Select the "Customize Toolbox .." command from the "Tools" menu.

3. Step

Enable the "CMVSmartControl" ActiveX Control and press OK.

4. Step

Select the MVSmartControl from the Toolbox Window and draw the control into the dialog resource.

 

5. Step

Add a member variable for the MV Smart Control.

Insert the following import command into the dialog source file:

#pragma warning(disable: 4099) // disable the warning
#import "C:\\WINNT\\System32\\MVSmartControl.dll" no_namespace named_guids
...
#pragma warning(default: 4099) // enable warning

This command includes all interfaces and additional information from the control COM type library. After compilation there are two new files in the destination folder: MVSmartControl.tlh and MVSmartControl.tli. These files contains all declarations from the control type library. From now you can use all interfaces from the MV Smart Control in the application.

The #import statement generates smart pointer wrapper for the control interfaces. Simply add "Ptr" to the interface name to get the corresponding smart pointer. To get a control interface use following code:

IMVSCFilterGraphPtr graph;
graph = m_controlVideo.GetControlUnknown();
if(graph != NULL) // use NULL not 0L or something to aviod compiler errors!
{
    // ...
}

6. Step

Load a MontiVision Project File with the filter configuration for your application .

HRESULT hr;
CString szPath = ".\\grabimage.mvp";
...
if(graph != NULL)
{
    hr = graph->LoadConfig(szPath.AllocSysString());
    if(SUCCEEDED(hr))
    {
        ... // some configuration stuff
        hr = graph->Start(); // start filter graph
    }
}

7. Step

The MontiVision Smart Control supports control events with the  _IMVSmartControlEvents  interface. To insert event handler open the "Add Event Handler" Dialog.

The Message type list contains all available Events from the MV Smart Control. Add Functions for the events you want to handle and pres the "Add and Edit" button. The dialog inserts some code like this:

BEGIN_EVENTSINK_MAP(CImageGrabberDlg, CDialog) 
    ON_EVENT(CImageGrabberDlg, IDC_MVSMARTCONTROL, 1 , StartedMvsmartcontrol, VTS_NONE)
    ON_EVENT(CImageGrabberDlg, IDC_MVSMARTCONTROL, 3 , StoppedMvsmartcontrol, VTS_NONE)
END_EVENTSINK_MAP()

void CImageGrabberDlg::StartedMvsmartcontrol()
{ 
    // TODO: Add your message handler code here
}

void CImageGrabberDlg::StoppedMvsmartcontrol()
{ 
    // TODO: Add your message handler code here
}

The XxxMvsmartcontrol methods were called by the MV Smart Control.

See Also

• MV Smart Control Interface Overview
• MV Smart Control Samples