I've created a timer which makes a textbox's text appear to be moving from left to right, how can I make it look smoother?

First of all, I don't know what timer do you use. If you are using you are using System.Windows.Forms.Timer, don't do it: this timer is absolutely unsuitable for animation, because its accuracy is unacceptable, it can be amazingly bad. The only "benefit" of this timer class is the simplicity of...