Check the Found property of the associated dataset. Keep in mind it is
possible with IBO for keypresses to be taken in and processed while previous
key presses are still processing. This has to do with the CallbackInc
setting. If you don't want callbacks then you need to set this property
to -1. This will force each call to Locate to complete.

PS. In the next sub-release the TIB_LocateEdit will have a Found property on
it as well.

Regards,
Jason Wharton