Updating .NET user controls on the screen

I have some user controls that I need to add a lot of data to. This can be slow as the screen display is updated when each item of data is added. It also makes the dislpay flicker.

I couldn't find an equivalent of the BeginUpdate and EndUpdate functions in .NET 2.0, but it is possible to call the Windows API functions as follows.

private const int WM_SETREDRAW = 11;

[System.Runtime.InteropServices.
DllImport("user32.dll")]
static extern bool SendMessage(IntPtr 
hWnd, Int32 msd, Int32 wParam, Int32 
lParam);

/// 

/// Stop updates while we are 
/// filling a control with data
/// 
protected void BeginUpdate()
{
  SendMessage(this.Handle, WM_SETREDRAW, 0, 0);
  Cursor.Current = Cursors.WaitCursor;
}

/// 

/// Restart updates
/// 
protected void EndUpdate()
{
  SendMessage(this.Handle, WM_SETREDRAW, 1, 0);
  if (Parent != null)
  {
    Parent.Invalidate(true);
  }
  Cursor.Current = Cursors.Default;
}

I included these in a base class used by all my user controls, and added code to change the cursor to a wait cursor whilst the control was updating.