I am trying to set heading for rowheader.

dataGridView1.Rows[rowIndex].HeaderCell.Value = “Updated Cell1”;

I used this,If i give rowIndex as 0,the cell below the header is updating. is there any way to set the value for rowheader?

objDataGridView.Columns[0].HeaderText = “Cells”;// used this for column headerText updation,but it doesnt workout on rowheaderenter image description here
NOte:need to set value for marked cell in the attached image

Is there any suggestions,Let me know