This function registers the surrogate process through its ISurrogate interface pointer.
The CoRegisterSurrogate function sets a global interface pointer to the ISurrogate interface implemented on the surrogate process. This pointer is set in the ole32 DLL loaded in the surrogate process. COM uses this global pointer in ole32 to call the methods of ISurrogate.
This function is usually called by the surrogate implementation when it is launched.
To determine whether the platform supports this function, see Determining Supported COM APIs.