>m.stroeid=thisform.text1.value
> seek (m.storeid).....2
> if found()&& mean faster

Cut out some of the lines. No need to store it in a variable, no need for if found()

if seek(alltrim(thisform.text1.value))
       && You found it
    else
      && You didn't find it
    endif

>Also put controlsources in your texboxes .....3? how

Right-mouse on the texboxe, bring up the property sheet, and poit the controlsource of the textbox to the table field.

But you seem to be putting all this code in the same place? Why not have separate code for separate click event buttons.

Click event for the add button

Select myTable 
     append blank

Click event for the delete button

select myTable
     delete 
     thisform.refresh()

etc....

This way have no need for the ACT_FLAG variable to determine what the user is doing.