Kalpsanu

i cant get you plz paste your code example: oledbconnection a=new oledbconnection(" ") a.open() oledbcommand........ oledbreader c........ int i=0 while c.read() i=i+1 combobox1.items.add(i) End while a.close() private void combobox1_indexchanged(.............. a.open() n=combobox1.selecteditem() for i=0 to n c.read() end for s=c.item(1) combobox2.items.add(s) combobox2.selecteditem=s a.close() it might hava got lot of syntax errors …

if your main form is form1 then include form1.Activeform.show();

insert the columns in the database then use update statement to calculate fault and whatever you want