Refer to Automatically Wrap Text in Label. It describes how to create your own growing label.
Here is the full source taken from the above reference:
using System;
using System.Text;
using System.Drawing;
using System.Windows.Forms;
public class GrowLabel : Label {
private bool mGrowing;
public GrowLabel() {
this.AutoSize = false;
}
private void resizeLabel() {
if (mGrowing) return;
try {
mGrowing = true;
Size sz = new Size(this.Width, Int32.MaxValue);
sz = TextRenderer.MeasureText(this.Text, this.Font, sz, TextFormatFlags.WordBreak);
this.Height = sz.Height;
}
finally {
mGrowing = false;
}
}
protected override void OnTextChanged(EventArgs e) {
base.OnTextChanged(e);
resizeLabel();
}
protected override void OnFontChanged(EventArgs e) {
base.OnFontChanged(e);
resizeLabel();
}
protected override void OnSizeChanged(EventArgs e) {
base.OnSizeChanged(e);
resizeLabel();
}
}