A. Downloading and running the executable caesar.exe (see below for compiling instructions) Create a new folder in a location you can find easily, called CryptoPrograms or something similar that you will easily recognize. Create another folder inside this one for the Caesar program, called e.g., Caesar. Now download the executable caesar.exe into this folder. To run the program, double-click the executable, and a new window should open. It will ask for the word to be caesared. Before going further, I suggest that you customize the window as follows: 1. There is an icon just to the left of the title at the top left of the window. Clicking on this reveals a drop-down menu. Select the Defaults option. This opens another window called Console Windows Properties, which has 4 tabs. Change nothing in the General tab. 2. Click on the Font tab and choose Lucida Console, whose letters are easy to read than the other choice. 3. Click on the Layout tab. Increase both the window width and screen buffer width from 80 to 90, giving a slightly wider window. 4. Click on the Colors tab. Change the screen background from black to white and the screen text from white to black by clicking on the appropriate radio button and then on the desired color square. 5. When you have finished making the changes, click OK. These changes doen't take effect until after the window is closed and re-opened. To make the changes immediate, select Properties in the drop-down menu and make the same changes. You can make the window longer by dragging down on the lower right corner of the window. At the correct mouse position, a double-headed arrow control should appear. You can't make the window wider using this control. After customizing the window, go back to the program window, enter the word to be caesared. It can be entered in lower or upper case. If at some point you want to print out the display, you will need to prepare the window to highlight the part you want to print. To do this, follow these steps: 1. Click on the icon at the top left corner of the window and mouse down to Edit. 2. A second menu opens; select Mark. 3. Now use the mouse to highlight the portion of the window you want to print. This is done by selecting the area you want just as in a word-processing document. 4. Open the drop-down menu again, mouse down to Edit, and select Copy in the second menu. 5. Open a new document in Notepad. 6. In Notepad's Edit menu select Paste. The part of the window you highlighted should now appear in this Notepad document, and you can print it. When the caesar program finishes, it waits for you to push the Enter or Return key. This causes the window to close. B. Compiling the program Caesar.pas Compiling is the process whereby a program source file, such as Caesar.pas, is used to create an executable program, in this case caesar.exe. After downloading the file Caesar.pas into a folder of your choice, you must next download the Free Pascal Compiler. This is done using your web browser: Enter the url www.freepascal.org/download.var into your browser, and follow the directions given in the last paragraph of the ND2009 Computer Column. When the file is downloaded, you should have an icon called Free Pascal IDE under your start menu. Click on this and a window should open, with its own menu bar. Under the File menu, select Change dir..., then navigate to the folder containing Caesar.pas by selecting folders and using the Chdir button until it appears. Hit the OK button, then, under the File menu, select Open..., and choose the program Caesar.pas. When it opens, go under the Compile menu and select Compile. If it is successful, you will have the executable caesar.exe in the folder with the source file Caesar.pas. From MyComputer, navigate to the folder, double-click the executable, and a new window should open with "ENTER THE STRING TO BE CAESARED ("-1" TO QUIT):" displayed. That's all there is to it!