<p>Can anyone help me to put a vertical scroll bar for an <code>&lt;asp:CheckBoxList&gt;</code>?</p>

Try actually sending the Key Combination Ctrl+C, instead of directly terminating the process:
```
```
[DllImport("user32.dll")]
        public static extern int SendMessage(
              int hWnd,      // handle to destination window
              uint Msg,       // message
              long wParam,  // first message parameter
              long lParam   // second message parameter
              );
```
```
Look it up on the MSDN, you should find what you need there in order to send the Ctrl+Key combination...
I know that the message you need for sending Alt+Key is WM_SYSTEMKEYDOWN and WM_SYSTEMKEYUP, can't tell you about Ctrl...