What is a virtual grid in WinForms GridControl?

//Hook the below events in Form_Load to have a virtual grid
gridControl1.QueryCellInfo += gridControl1_QueryCellInfo;
gridControl1.QueryRowCount += gridControl1_QueryRowCount;
gridControl1.QueryColCount += gridControl1_QueryColCount;    

private void gridControl1_QueryCellInfo(object sender, GridQueryCellInfoEventArgs e)
{
    if (e.ColIndex > 0 && e.RowIndex > 0)
    {
        e.Style.Text = string.Format("R{0}:C{1}", e.RowIndex, e.ColIndex);
        e.Handled = true;
    }
}        

private void gridControl1_QueryRowCount(object sender, GridRowColCountEventArgs e)
{
    //Set RowCount
    e.Count = 1000;
    e.Handled = true;
}

private void gridControl1_QueryColCount(object sender, GridRowColCountEventArgs e)
{
    //Set ColCount 
    e.Count = 100;
    e.Handled = true;
}

'Hook the below events in Form_Load to have a virtual grid
AddHandler Me.gridControl1.QueryCellInfo, AddressOf gridControl1_QueryCellInfo
AddHandler Me.gridControl1.QueryRowCount, AddressOf gridControl1_QueryRowCount
AddHandler Me.gridControl1.QueryColCount, AddressOf gridControl1_QueryColCount

Private Sub gridControl1_QueryCellInfo(ByVal sender As Object, ByVal e As GridQueryCellInfoEventArgs)
    If e.ColIndex > 0 AndAlso e.RowIndex > 0 Then
           e.Style.Text = String.Format("R{0}:C{1}", e.RowIndex, e.ColIndex)
           e.Handled = True
    End If
End Sub

Private Sub gridControl1_QueryRowCount(ByVal sender As Object, ByVal e As GridRowColCountEventArgs)
    'Set RowCount
    e.Count = 1000
    e.Handled = True
End Sub

Private Sub gridControl1_QueryColCount(ByVal sender As Object, ByVal e As GridRowColCountEventArgs)
    'Set ColCount 
    e.Count = 100
    e.Handled = True
End Sub