C# 0 The Complete Reference

StopButtonClick( )

.

Inside

StopButtonClick( )

, the message box is displayed by the following statement:

// If user answers Yes, terminate the program.

DialogResult result = MessageBox.Show("Stop Program?",

                        "Terminate",

                        MessageBoxButtons.YesNo);

Here, the message inside the box is “Stop Program?”, the caption is “Terminate,” and the 

buttons to be displayed are Yes and No. When 

Show( )

 returns, the user’s response is 

assigned to 

result

. That response is then examined by the following statement to determine 

the course of action:

if(result == DialogResult.Yes) Application.Exit();

If the user clicks the Yes button, the program is stopped by calling 

Application.Exit( )

,

which causes the immediate termination of the program. Otherwise, no action is taken, and 

the program continues running.

Sample output is shown in Figure 26-3.

F

IGURE

 26-3 

Sample output 

from the Stop 

Button program

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