Alternative to datagridview - getcelldisplayrectangle method

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C#4.0

DataGridView

I need to get the x and y coordinates of two cells rectangle boundary. At the moment, I am using

GetCellDisplayRectangle

method inside

dataGridView1_Paint(object sender, PaintEventArgs e)

event.

The problem is that I get 0 for x and y value if the cells is not visible on the screen.

What would be the alternative method to get x and y coordinates of two cells even if the cells are not visible on screen ?

What I have tried:

Rectangle cell_1 = dataGridView1.GetCellDisplayRectangle(column1, row1, false);
Rectangle cell_2 = dataGridView1.GetCellDisplayRectangle(column2, row2, false);

int x1 = cell_1.Right;
int y1 = (cell_1.Top + cell_1.Bottom) / 2;

int x2 = cell_2.Right;
int y2 = (cell_2.Top + cell_2.Bottom) / 2;