Listing 3: Adding Form1 class variables.
public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.TrackBar trackBar1; private System.Windows.Forms.Label label1; private System.Windows.Forms.Label label2; private System.Windows.Forms.Label label3; /// <summary> /// Required designer variable. /// </summary> private int defaultRsrcMgrSess; // Default Resource Manager session private int funcGenSess; // functionGenerator session private byte [] programMessage = new byte[256]; ... }