Hi,

This is example of a button:

HalPushButton(h,v,h+l,v+vs,"UpdCustomerAddressCUDsm","Update Address");

To find out what parameters mean please refer to:
http://halforum.hansaworld.net/primitives/procedure/HalPushButton

UpdCustomerAddressCUDsm is procedure that will be called when user clicks a button.

Best Regards,
David D.