Useful technique? "internal call"

[NoCforMe]

I don't write funny code like that anymore though. Just buggy code. 

What, no self-modifying code for you? What's the fun in that?

[jj2007]

Unless you're doing some kind of INVOKE there ...

You can pass params using good ol' push push call ;-)

Why would you use RET n instead of just plain RET?

RET is a macro, RETN is an instruction.

With ret, you get an epilogue there, which you can suppress with OPTION EPILOGUE:NONE - but its messy *)

No epilogue with retn, but check if you passed parameters on the stack:
retn   ; no paras passed
retn 4 ; one para passed
etc

*) Imagine you are using your own prologue/epilogue macros. So before each "internal ret", you put epilogue:none, ok. But afterwards you need an epilogue:MyFancyEpilogue... otherwise you are in serious trouble.