Sometimes you might to connect two notes via a Chromatic Run for an effect. The run can be as short as 3 notes or as long as you want to connect your two notes.
The SECRET to playing a Chromatic Run is to know your starting note, your finishing note of the run and most importantly, to know your FINGERING !
This PDF file explains in detail how to accomplish this.
This video link demonstrates the technique, which can make anyone sound like a professional.
Tips and Techniques from Marco Mendez.
Connecting two notes via a Chromatic Run for an effect.