is changing the wildcard for field values, not field names in a LOAD statement (here, * is used to reference all fields from the input table).
Star is %;
LOAD * INLINE [
Field1, Field2,
A, 1
A, 2
B, %
C, 3
];
Now create list boxes for Field 1 and Field2, you will notice that Field2 only shows values 1 to 3, not a '%' symbol.
Regardless what you select in Field 2, value 'B' in Field 1 will be possible, because of it's 'Wildcard' use.
Hope this explains a little bit the 'star is ...' statement (though I almost never use it, AFAIR, I've had seen some side effects, then dropped it from my daily usage).