Stopping TextBox flicker during update

Question

My WinForms application has a TextBox that I\'m using as a log file. I\'m appending text without the form flickering using TextBox.AppendText(string);, however

Answer 1

Mathijs answer is works for me. I've modified it slightly so I can use with any control - a control extension:

namespace System.Windows.Forms
{
    public static class ControlExtensions
    {
        [System.Runtime.InteropServices.DllImport("user32.dll")]
        public static extern bool LockWindowUpdate(IntPtr hWndLock);

        public static void Suspend(this Control control)
        {
            LockWindowUpdate(control.Handle);
        }

        public static void Resume(this Control control)
        {
            LockWindowUpdate(IntPtr.Zero);
        }

    }
}

So all you need to do is:

myTextBox.Suspend();
// do something here.
myTextBox.Resume();

Works well. All flickering stops.