C# 0 The Complete Reference

PART II

C h a p t e r   2 6 :  

U s e   S y s t e m . W i n d o w s . F o r m s  

863

  void MMExitClick(object who, EventArgs e) {

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

                            "Terminate",

                             MessageBoxButtons.YesNo);

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

  }

}

Sample output is shown in Figure 26-4.

This program defines two drop-down menus. The first is accessed via the File menu. It 

contains the Open, Close, and Exit selections. The menu handlers for Open and Close are 

simply placeholders that perform no function other than displaying a message box to that 

effect. The Close handler asks if you want to stop the program. If you answer Yes, the 

program is terminated.

The Tools menu has these selections: Coordinates, Change Size, and Restore. Selecting 

Coordinates causes the coordinates of the upper-left and lower-right corners of the window 

to be displayed in a message box. Try moving the window and then displaying its coordinates. 

Each time the window is moved to a new location, its coordinates change.

Choosing Change Size causes the window to be reduced in size so its width and height 

are both 200 pixels long. This is done through the