>I have set a combo box, IncrementalSearch=.T., RowSourceType=6fields, RowSource=PART_ID, but total records from PART_ID is over 10,000. It is very very show when type anything in the combobox, please help, thank you!

Samuel,

A combo is the wrong control to use for 10,000 items. You need a more sophisticated interface to assist a user in selecting one of 10,000 possible choices. Try using a combination of textboxes adn a grid where the suer can specfiy a bunch of cretiera in teh textboxes adn you then give them a list of matches in the grid from which they can make a final selection.

I know I don't want to be using a combo to choose from 10,000 items. Combos and lists breal down seriously beyond a couple of hundred items.