This function searches the global variable symbol table to find the global variable with the name stored in T{pEx->Buffer}. If the variable was not declared then this function inserts the variable into the symbol table if the argument iInsert is true, but nothing more: the symbol table entry remains NULL.
void **ex_LookupGlobalVariable(peXobject pEx,
int iInsert
){
The function returns pointer to the pointer stored in the symbol table associated with the global
variable.