INmChannelVideo
The INmChannelVideo interface manages the exchange of video information during a conference.
You do not need to implement this interface because the NetMeeting 3 run time provides the INmChannelVideo implementation on the Video Channel object. However, you need to implement the corresponding event handler methods for INmChannelVideoNotify.
When to Use
Call the INmChannelVideo methods from your NetMeeting client application to check the state of a video channel or to set and retrieve the channel's properties. Before calling any of the INmChannelVideo methods listed below, users should confirm that the NMCH_VIDEO bit is set for this channel by using INmSysInfo::GetNmchCaps to retrieve the local system channel capabilities.
Methods in Vtable Order
| IUnknown methods | Description |
|---|---|
| QueryInterface | Returns pointers to supported interfaces. |
| AddRef | Increments reference count. |
| Release | Decrements reference count. |
| INmChannel methods | Description |
|---|---|
| IsSameAs | Checks whether this Channel object and one other Channel object represent the same channel. |
| IsActive | Checks whether this channel is currently engaged in some activity. |
| SetActive | Activates a channel. |
| GetConference | Finds the conference using this channel. |
| GetInterface | Retrieves the interface identifier (IID) that identifies this channel. |
| GetNmch | Retrieves the NMCH type for this channel. |
| EnumMember | Retrieves an enumerator to list all the members using this channel. |
| GetMemberCount | Retrieves the number of members using this channel. |
| INmChannelVideo methods | Description |
|---|---|
| IsIncoming | Reflects whether the channel has incoming or outgoing video data. |
| GetState | Retrieves the video channel state. |
| GetProperty | Retrieves a video channel property. |
| SetProperty | Sets a video channel property. |
Requirements
** Windows NT/2000:** Requires Windows NT 4.0 SP3 or later.
** Windows 95/98:** Requires Windows 95 or later. Available as a redistributable for Windows 95.
** Header:** Imsconf2.idl.