C:\Program Files (x86)\Labcenter Electronics\Proteus 7 Professional\LIBRARY

To add these library files to Proteus:

Once you have downloaded the .ZIP or .RAR file, follow these steps to integrate them: How to Import HT12E and HT12D IC into Proteus 8

(Note: This link redirects to The Engineering Projects archive, a trusted repository for Proteus component libraries.)

Search for "Proteus Library for HT12E and HT12D" on GitHub or engineering blogs like The Engineering Projects.