Manipulating an image

To start, in my c:\data folder, I have a file called lessonimage. As you can see in Figure 25.4.1, the writing on the Coke can is red and the background seems to be reddish-brown:

Figure 25.4.1: The image to be used for inverting colors at the pixel level in this chapter

What we will do is switch the colors around, so that the writing on the Coke can, for example, will become green, and you will learn how you can manipulate images at the individual pixel level.

Adding a button and an image control to the HTML

Open up a new project. Delete the two lines that begin with <div...; also delete the Label line this time. You don't need any of them.

Next, you need to insert a Button control into the...