Based on Kerrek SB's example I came with this to demonstrate void pointer-to-pointer as an argument and how it may be used.
#include
void test(void ** jeez)
{
*jeez = (void *) (int) 3;
}
int main (int argc, char* argv[])
{
void *a;
test(&a);
int b = *(int *)&a;
printf("value returned = %d\n", b);
return 0;
}