Default inproc handler. May be optionally provided only for Context = LocalServer or LocalServer32. A non-numeric value is ...

Default inproc handler.   May be optionally provided only for Context = LocalServer or LocalServer32. A non-numeric value is treated as a system file that serves as the 32-bit InprocHandler (appearing as the InprocHandler32 value). 
 Value 
 Meaning 

 1 = default (system) 
 16-bit InprocHandler (appearing as the InprocHandler value) 

2 = default (system) 
 32-bit InprocHandler (appearing as the InprocHandler32 value) 

3 = default (system) 
 16-bit as well as 32-bit InprocHandlers