The PCOMM.DLL and the PCOMM.LIB can be used to develop applications with the PComm Lite Windows tool. By default, the PComm Lite tool is installed in the Program Files\PCommLite\ folder on a Windows system. The PCOMM.DLL and PCOMM.LIB files can be found in the C:\Program Files\PCommLite\Lib\x86 folder.