need help with datasets

[arnoldino]

hello everybody

i'm newbie in C#, and i have a big problem that i can't resolve on my own.

the situation is i have these:

public partial class frmClients : Form
    {
        public SQLiteDataAdapter daClients;
        public DataSet DS=new DataSet();

        public int rowID;
        
        ...

        // on form_load daClients gets the datas from the database
        // and then get a new dataset, because we don't wanna display all the columns in a DataGrid
        DataSet dsListed=new DataSet();
        SQLiteDataAdapter daC = new SQLiteDataAdapter("select id,companycode as Code, name as Name, deleted as Deleted from clients", daClients.SelectCommand.Connection);
         // popultae the DataGrid with, filtred by the FieldName
         daC.Fill(dsListed,"clients");
         dataGrid1.SetDataBinding(dsListed, "clients");

         // I have a method to determinate the selected ID, using the DataGrid1.CurrentRowIndex, and passing to the rowID the "id" column's value

         // so until thIs it works everything fine, if  i hit an update button with the following code,
         daClients.Update(DS);
         // it updates the database
         // i understood everything until this point

         // i can access the client's data by DS.Tables["clients"].Rows[rowID]

     }

and here comes my big question:
how can i pass this row to an other form, where the user can change the client's datas, and then pass back to this form's dataset, so i can update it in the database. but it's very very important to do this the least memory allocation.

can anybody help me with this?

regards