C# Winform : DataGridView and UserControl

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C#

WinForms

Hi All,
I have DataGridView(DGV) in its 1st column of every row [with DGV.GetCellDisplayRectangle(...) menthod) I placed UserControl(UC). But when row counts increases it adds scroll to DGV
And then i'm not able to move UC to scrolled location, Because DGV.GetCellDisplayRectangle(...) returns Rectangle.X = 0 and Rectangle.Y=0 every time (If DGV.Cell is visible).
Why? Now how to solve this problem?

void dgvMapper_Scroll(object sender, ScrollEventArgs e)
        {

                int intCnt = 0;
                foreach (UserControl ucEL)
                {
                    ucEL.Visible = false;
                    Rectangle rect = this.dgvMapper.GetCellDisplayRectangle(1, intCnt, false);
                    ucEL.Location = rect.Location;

                    ucEL.Size = rect.Size;
                    if (!(rect.X==0 && rect.Y==0 && rect.Height==0))
                        ucEL.Visible = true;
                    intCnt++;

                }

}

}