Download and extract the library files (typically .LIB and .IDX ). Copy these into the LIBRARY folder of your main Proteus installation directory.
You can find specialized drivers on Circuit Digest or DeepBlue . Proteus 4x4 Keypad Library Download
const byte ROWS = 4; const byte COLS = 4; Download and extract the library files (typically
C:\Program Files (x86)\Labcenter Electronics\Proteus 8 Professional\Data\LIBRARY Copy Files: files into the Restart Proteus: const byte COLS = 4