net a parameter like #4191 to a gladevcp.hal_label

net a parameter like #4191 to a gladevcp.hal_label ?

some gladevcp.hal.button are used
with VCP Action MDI Command #4191 = <_y> e.g.
to store teach in positions

it works fine using the file
linuxcnc.var
4191 68.045000 individual parameters
.... individual parameters
4232 0.000000 individual parameters
....
5161 0.000000 standard parameters
.... standard parameters
5390 0.000000 standard parameters

how should it be configured now, to net a parameter like #4191 to a gladevcp.hal_label ?

you may look here
www.linuxcnc.org/docs/html/gui/gladevcp....mand_on_button_press