Pointer direction when press enter key in datagridview c#

Hi friends ,
I am very urgent for my project but i am in trouble with datagridview , When I press enter key in a datagridviewcell , I find  , it is default that pointer will move down to the next row but It is not what i want , I want to change pointer direction when press enter key . It means , Instead of moving the pointer down to the next row , it will be moved to the next cell at current row . I have tried with an override for event of keyup  but the pointer was only moved to the next cell at current row after moving down to next row as default , furthermore , it is useful for the row that was not the row beside last row .  I hope to have your answer soon . Thank you .
Here is my code :
protected override void OnKeyUp(KeyEventArgs e)
{
int currentRow = 0;
int indexColumn = 0;
int Index;
if (e.KeyCode == Keys.Enter)
if (RowCount > 0)
{
Index = this.CurrentCell.RowIndex;
indexColumn = this.CurrentCell.ColumnIndex;
if (Index < RowCount - 1)
currentRow = Index - 1;
else
currentRow = Index ;
if (indexColumn < this.ColumnCount - 1)
indexColumn += 1;
if (currentRow >= 0)
this.CurrentCell = this.Rows[currentRow].Cells[indexColumn];
}
base.OnKeyUp(e);
}