>i understand that tabstop property of a combo allows the user to move from one combo to another using the tab key.
>
>but how to do this by pressing the enter key?

You could use keypress event. You might need to check if dropped down (else enter would go to next control by default).

*Click and gotfocus
this.Tag =''

*DropDown
this.Tag ='dropped'

*Keypress
Lparameters nKeyCode, nShiftAltCtrl
If nKeyCode=27
  This.Tag=''
Endif
If nKeyCode=13 And This.Tag='dropped'
  Keyboard '{TAB}'
Endif

Cetin