QMedia Grabber channel commands |

### QM_GetChannelUsage

QM_GetChannelUsage(areaRef; channelRef; channelUsage):error
| areaRef | Longint | Grabber area reference
| channelRef | Longint | Channel reference
| channelUsage | Longint | Channel usage
| error | Longint | Error result

Returns the channel's usage in the grabber plug-in area. A channel can be used in preview, in recording, and it can play during record or not.

The grabber plug-in area is specified by areaRef.

Parameter channelRef is the reference to the channel. The channel reference must have been previously obtained with a call to QM_NewChannel.

Parameter channelUsage receives the channel's usage in the grabber plug-in area. The channelUsage parameter is the combination (with addition or bitwise "or") of any of the following constants.

qm_seqGrabRecord | 1 | Channel is used in recording.
qm_seqGrabPreview | 2 | Channel is used in preview.
qm_seqGrabPlayDuringRecord | 4 | Channel plays during record.

Related commands

QM_SetChannelUsage | Changes the channel's usage.

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