Provide a brief definition of the following terms (in the interface programming context):

• Scope
• Instantiate
• Object
• Pseudo-random

If you use a source (book or web site), cite your source. (The sites http://whatis.techtarget.com/ and http://www.webopedia.com/ are decent sources for technical definitions.)

The Scream

• Design a form with an image in which the image grows and shrinks. The image I used is The Scream by Edvard Munch, but you can use a different image.
• Use a timer to change the PictureBox's width and height. In order to maintain the aspect ratio (to some extent), the image width and height of the example were multiplied by a number such as 1.03 to grow and 1/1.03 to shrink.
• To keep the image centered the X component of the PictureBox's location was set to half of the form's width minus half of the PictureBox's width. It is somewhat similar for the Y component (though you may have to adjust for the Form's title bar.)
• Experiment with conditions for switching from growing to shrinking and back again.
• (In the example, the PictureBox is always larger than the form.)

Part 1. GPA Calculator

Part 2. Bar Chart

• The user enters values in a (Masked) TextBox and clicks a Button to add them to a ListBox.
• Then the user clicks the lower button to make a "bar chart" of those values.
• First the Maximum value from the list is determined.
• The chart area is a Panel. Thus, instead of using Me.CreateGraphics (as we have in the past) use pnlChart.CreateGraphics
• Clear the Panel of any previous results with code like the following
  
  

          pnlChart.CreateGraphics.Clear(Color.LightSteelBlue)
          

• Loop through the Items in the ListBox and draw the corresponding rectangles.
• The height of the bar rectangles is the height of the Panel divided by the number of Items in the list. (You might want to use a little less than the height so it is not so squeezed in.) The Left, top, width and Height arguments of FillRectangle and DrawRectangle have to be integers, so use cInt() to cast any calculation as a integer.
• The width of the bar rectangles is the value being represented times the Panel's width divided by the maximum value. Cast as an integer. Again you might want to use a little less than the Panel's width
• Each rectangle's Left will be 0. The i^th rectangle's Top with be i times the rectangle's height. (You might have a little offset to make it look nice.)