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Joe/Bob, > I haven't done much with the AID byte for CHECK(ER) fields, but > according to the documentation Field Exit on a CHECK(ER) field should be > returning X'3F', while Enter should return X'F1'. Alas, no x'3F' is only returned when Auto Enter occurs via the Selector Light Pen, an optional feature on the original 5251 workstations. It is *not* returned due to keyboard activity resulting in auto enter whether by Field Exit or filling a field which does not require a Field Exit. Unless you have a selector light pen (or an emulator which emulates one), you will never see x'3F'. There is no value for the field exit key, because in the 5250 protocall, it is not a so-called AID generating key (for Attention IDentification). The field exit, like alphameric characters, is handled locally by the WS controller (or its equivalent for non-twinax devices). If the display format has CHECK(ER) active, the value you get back is still x'F1'. Doug
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