Question: 9. To draw a rectangle on rich text box Doct by pressing mouse key then drag it until you determine the rectangle size then stop
9. To draw a rectangle on rich text box "Doct" by pressing mouse key then drag it until you determine the rectangle size then stop pressing to draw the rectangle. The left upper corner point (x1,y1) value will be taken in the event handler: (2 points) O Doct_MouseUp O Doct_MouseDown O All answers are false Doci MouseMove
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