Tablegrid onchange

Hi

Could someone help me on the way

I want a tablegrid automatic filled by selecting a combobox onchange

I have got it working for a textbox wirth the next query

home.edit7.text := sqlexecute('select Opdrachtgever from klant where id =' +home.Klant.sqlvalue);

I tried

home.tablegrid1.cells[1,1] := sqlexecute('select naam Opdrachtgever from klant where id =' +home.Klant.sqlvalue);

but no luck

Anyone got a suggestion

thnx

Herman