Mswinsck.ocx [better] -

Modern Windows versions (Vista, 7, 8, 10, 11) utilize User Account Control (UAC). Registering OCX files requires elevated Administrator privileges. Running regsvr32 without admin rights will result in a failure.

In the late 1990s and early 2000s, mswinsck.ocx was arguably the most popular method for creating networked Windows applications. It was instrumental in the creation of: mswinsck.ocx