Additions:

Deletions:

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void *ioFindExternalFunctionIn(char *lookupName, void *moduleHandle)

Parms:
lookupName char * to function name
moduleHandle magic number that identifies the module

return:
entry address of the function, later we jump to that address hoping to execute code, or zero

From: Interpreter
Why:
Need to load entry point of function for later use in a procedure call

Responsibility:
must return zero, or a valid address of executable code.

MacIntosh
os-9/OSXCarbon
copy of the unix code

Cocoa:
TBD

iPhone
Not supported

Unix
invokes dlsym() returns the address of the code or data location specified by the null-terminated character string symbol. Which libraries and bundles are searched depends on the handle parameter.

Windows
Simple, GetProcAddress

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