DataGridView-when I press enter it goes to the next cell

Try using this:

bool notlastColumn = true;

protected override bool ProcessCmdKey(ref System.Windows.Forms.Message msg, System.Windows.Forms.Keys keyData)
{
    int icolumn = dataGridView1.CurrentCell.ColumnIndex;
    int irow = dataGridView1.CurrentCell.RowIndex;
    int i = irow;
    if (keyData == Keys.Enter)
    {
        if (icolumn == dataGridView1.Columns.Count - 1)
        {
             //dataGridView1.Rows.Add();
            if (notlastColumn == true)
            {
                dataGridView1.CurrentCell = dataGridView1.Rows[i].Cells[0];
            }
            dataGridView1.CurrentCell = dataGridView1[0, irow + 1];
         }
        else
        {
            dataGridView1.CurrentCell = dataGridView1[icolumn + 1, irow];
        }
        return true;
    }
    else
        if (keyData == Keys.Escape)
        {
            this.Close();
            return true;
        }
    //below is for escape key return
    return base.ProcessCmdKey(ref msg, keyData);
    //below is for enter key return 
    return base.ProcessCmdKey(ref msg, keyData);     
}

Just copy and paste the code.

Only thing you should have grid in your form.

Forget about CellEnter event and the Form1_KeyPress event also. Just handle the dataGridView1_KeyDown event like this:

    private void dataGridView1_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.KeyData == Keys.Enter)
        {
            int col = dataGridView1.CurrentCell.ColumnIndex;
            int row = dataGridView1.CurrentCell.RowIndex;

            if (col < dataGridView1.ColumnCount - 1)
            {
                col ++;
            }
            else
            {
                col = 0;
                row++;
            }

            if (row == dataGridView1.RowCount)
                dataGridView1.Rows.Add();

            dataGridView1.CurrentCell = dataGridView1[col, row];
            e.Handled = true;
        }
    }

Please note that I changed the code a bit, and remember to set the Handled event property to true, otherwise it will process the default behavior.

Cheers!

this works for me

private void dataGridView1_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.KeyData == Keys.Enter)
        {                
            e.SuppressKeyPress = true;
            int row = dataGridView1.CurrentRow.Index;
            int col = dataGridView1.CurrentCell.ColumnIndex;
        }
    }