Fabian,

you clearly have started in the wrong end, so to speak. This so easy that you will laugh about it afterwards. Do NOT bind column 7 to any field in your table!!!!!

thisform.grid1.column3.controlsource='tempnota.teste'
thisform.grid1.column4.controlsource='tempnota.prova' 
thisform.grid1.column5.controlsource='tempnota.qualit'
thisform.grid1.column6.controlsource='tempnota.outros'
thisform.grid1.column7.controlsource='tempnota.teste + tempnota.qualit + tempnota.prova + tempnota.outros'

If you absolutely need a field for total in your table, update it in the grid's AfterRowColChange event!

replace tempnota.total with tempnota.teste + tempnota.qualit + tempnota.prova + tempnota.outros in tempnota

>Cause i become crazy whit that.
>First i tried to replace just the field involved on column, but when i did the replace on TOTAL don't work just did the replace on first record.
>
>When i'm moving on grid i opened the data session window to see if i'm moving into table too, and i move but when i do the replacement just replace the first record.
>
>I'm desesperate with this.
>
>Thx in advance