>My combobox rowsource is a SQL statement , everytime i run the form, it didn't show any value at the combobox, i need to select...how can i make the combobox display the first value?

In the form Init:

THISFORM.cboMycombo.Value = "ValueYouWantToShow"

Be sure and check Comnbo Properties like BoundColumn and BoundTo.

Bill