1 /// <summary>
 2         /// 
 3         /// </summary>
 4         /// <param name="sender"></param>
 5         /// <param name="e"></param>
 6         public virtual void SetTextBoxOnEnterStyle(object sender, EventArgs e)
 7         {
 8             if (sender is TextBox)
 9             {
10                 TextBox tbox = sender as TextBox;
11                 if (!tbox.ReadOnly)
12                 {
13                     tbox.BackColor = Color.Yellow;
14                 }
15             }
16         }
17 
18         /// <summary>
19         /// 
20         /// </summary>
21         /// <param name="sender"></param>
22         /// <param name="e"></param>
23         public virtual void SetTextBoxOnLeaveStyle(object sender, EventArgs e)
24         {
25             if (sender is TextBox)
26             {
27                 TextBox tbox = sender as TextBox;
28                 if (!tbox.ReadOnly)
29                 {
30                     tbox.BackColor = Color.White;
31                 }
32             }
33         }
34 /// <summary>
35         /// 
36         /// </summary>
37         /// <param name="frm"></param>
38         public virtual void SetFormTextBoxControlStyle(Form frm)
39         {
40             IterateControlsSetTextBox(frm.Controls);
41         }
42 
43         /// <summary>
44         /// 
45         /// </summary>
46         /// <param name="ctls"></param>
47         public virtual void IterateControlsSetTextBox(Control.ControlCollection ctls)
48         {
49             foreach (Control control in ctls)
50             {
51                 if (control is TextBox)
52                 {
53                     (control as TextBox).Enter += new EventHandler(SetTextBoxOnEnterStyle);
54                     (control as TextBox).Leave += new EventHandler(SetTextBoxOnLeaveStyle);
55                 }
56 
57                 if (control.Controls.Count > 0)
58                 {
59                     IterateControlsSetTextBox(control.Controls);
60                 }
61             }
62         }
63