Installing .OCX files is a relatively simple process. On a 64-bit Windows system, you can use both 32-bit and 64-bit OCX files. Place 32-bit OCXs in the '/Windows/SysWOW64' directory and 64-bit OCXs in the '/Windows/System32' directory.
Installing .ocx files directly into the software application folder where the corresponding .exe file is located offers several advantages and is generally a safer approach than immediately placing them in the Windows system folders.
Not all OCXs need to be loaded when an application starts. Developers can use "delayed loading" to load a OCX only when a specific function is called, improving initial startup time.