1, a new item, adjust the window size changes Form1 properties window of text attributes to "Responder" two in Form1 add a button control. Names were button1.button2.button3. Respectively, to control the test attribute set to "on the 1st on the 2nd on the 3rd." 3, in addition Form1 right textbox controls, to name textbox1. Its text attributes emptied. 4 again to add a button control, the name of Button4, its text attribute set to "reset." 5, click the button on the 1st, open source editor window, click the Add button code execution shown in the figure.

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