======**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://
rewritten unix code

**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

**BUGS**