C#

public partial class ExGridView : DataGridView<br />
{<br />
private int _footerHeight;<br />
public ExGridView()<br />
{<br />
InitializeComponent();<br />
_footerHeight = 20;<br />
}<br />
<br />
public int FooterHeight<br />
{<br />
get<br />
{<br />
return _footerHeight;<br />
}<br />
set<br />
{<br />
if (_footerHeight != value)<br />
{<br />
_footerHeight = value;<br />
Invalidate();<br />
}<br />
}<br />
}<br />
<br />
protected override void OnPaint(PaintEventArgs e)<br />
{<br />
base.OnPaint(e);<br />
Rectangle rOrginal = this.ClientRectangle;<br />
Rectangle rFooter = new Rectangle(0, this.Height, this.Width, _footerHeight);<br />
e.ClipRectangle.Offset(0, _footerHeight);<br />
e.Graphics.DrawRectangle(Pens.Black, rFooter);<br />
e.Graphics.DrawString("Test", this.Font, Brushes.Black, new PointF((float)rFooter.X + 10, (float)rFooter.Y + 5)); <br />
}<br />
}

Error	The type or namespace name 'Interop' does not exist in the namespace 'Microsoft.Office' (are you missing an assembly reference?)