Gx6021GetChannel

Returns whether the specified channel is open or closed.

Gx6021GetChannel (nHandle, nChannel, pnState, pnStatus)

Name	Type	Comments
nHandle	SHORT	Handle to a GX6021 board.
nChannel	SHORT	Channel numbers are from 1 (GX6021_CHANNEL_FIRST) to 20 (GX6021_CHANNEL_LAST).
pnState	PSHORT	Returns channel state are as follow: 0 = GX6021_STATE_OPEN 1 = GX6021_STATE_CLOSE
pnStatus	PSHORT	Returned status: 0 on success, negative number on failure.

Each group has five channels with total of twelve groups. In order to correlate the channel number (nChannel) to its group use the following formula:

Group number = (nChannel-1)/5, e.g. channel 8 is channel 3 in group B.

The following example returns channel 15 state:

SHORT nState, &nStatus

Gx6021GetChannel (nHandle, 15, &nState, &nStatus);