The DLL for the Leica interface is named LEICA.DLL.
The PC-DMIS Settings Editor section heading for the Interface-Specific Options is Leica Laser Interface.
This interface requires the use of Leica’s emScon driver (version 2.0 or above). Some older Leica machines do not have the emScon driver. You must upgrade to the latest drivers so that they are compatible with PC-DMIS.