Provided by:
linux-doc-2.6.15_2.6.15-23.39_all 
NAME
snd_ctl_add - add the control instance to the card
SYNOPSIS
int snd_ctl_add (snd_card_t * card, snd_kcontrol_t * kcontrol);
ARGUMENTS
card the card instance
kcontrol
the control instance to add
DESCRIPTION
Adds the control instance created via snd_ctl_new or snd_ctl_new1 to
the given card. Assigns also an unique numid used for fast search.
Returns zero if successful, or a negative error code on failure.
It frees automatically the control which cannot be added.