ASP.NET Web PDF Document Viewer/Editor Control Library

So far in this book the examples have been reasonably generic, with a little bias toward Unix-based operating systems. Ruby is a relative latecomer to the world of Microsoft Windows, but it now includes some libraries that make working directly with Windows APIs easy. This section looks at the basics of using the Windows API and Windows OLE capabilities from Ruby, although you ll need in-depth knowledge of these topics if you wish to put together more-advanced code.

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Note The concept of namespaces, or scopes, is a very important one. You will look at it in depth in the next chapter, but for now you can think of a namespace as a place where you keep your variables, much like an invisible dictionary. So when you execute an assignment like x = 1, you store the key x with the value 1 in the current namespace, which will often be the global namespace (which we have been using, for the most part, up until now), but doesn t have to be.

Microsoft Windows provides an Application Programming Interface (API) that acts as a library of core Windows-related functions for access to the Windows kernel, graphics interface, control library, networking services, and user interface. Ruby s Win32API library (included in the standard library) gives developers raw access to the Windows API s features.

As with the nancial services example presentation in the earlier chapters of this book, the example presentations in this chapter adhere to the design constraint of a limited budget to show you what you can do with a stock photography Web site and your own creativity if you have a larger budget or work with a professional graphic designer, you probably can do even better If you nd that adding the graphics to the storyboard is fun and relatively easy for you, that s only because of the hard work you accomplished in the story template If adding graphics is not your strength, work with others who can help, and be sure to visit wwwbeyondbulletpointscom for a continually fresh stream of graphical ideas designed to make that part of your job easier..

Note No code in this section will work under any operating system other than Microsoft Windows, and is

It s reasonably trivial to open a dialog box:

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You do this by adding in <scope>, where <scope> is some dictionary that will function as the namespace for your code string: >>> >>> >>> >>> 2.0 >>> 1 from math import sqrt scope = {} exec 'sqrt = 1' in scope sqrt(4) scope['sqrt']

require 'Win32API' title = "My Application" text = "Hello, world!" Win32API.new('user32', 'MessageBox', %w{L P P L}, 'I').call(0, text, title, 0)

First, you load the Win32API library into the program, and then you set up some variables with the desired title and contents of the dialog box. Next, you create a reference to the MessageBox function provided by the Windows API, before calling it with your text and title. The result is shown in Figure 11-1.

Then you invite your boss over to your desk to ask for his opinion He thinks that you should really emphasize how much you take data feeds from every international market He asks you to make the word every bold and underlined, and to add three more arrows to show more of the international market Then he says that he wants you to clarify the headline by adding the word nancial to international market, which extends the headline from two lines to three (upper right) Not sure whether the slide is exactly right, he calls his boss over for her opinion, and she says that you should emphasize the credibility of the data referenced in the headline, and she asks you to change the word data to uppercase and then add a photo of data of some sort (lower left).

The parameters to Win32API.new represent the following: