Simple .NET/ASP.NET PDF document editor web control SDK

1. The name of the system DLL containing the function you want to access 2. The name of the function you wish to use 3. An array describing the format of each parameter to be passed to the function 4. A character representing the type of data to be returned by the function In this case, you specify that you want to call the MessageBox function provided by user32.dll, that you ll be supplying four parameters (a number, two strings, and another number L represents numbers, P represents strings), and that you expect an integer to be returned (I representing integer). Once you have the reference to the function, you use the call method to invoke it with the four parameters. In MessageBox s case, the four parameters represent the following: 1. The reference to a parent window (none in this case) 2. The text to display within the message box 3. The title to use on the message box 4. The type of message box to show (0 being a basic OK button dialog box) The call method returns an integer that you don t use in this example, but that will be set to a number representing which button on the dialog box was pressed. You can, of course, create something more elaborate:

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As you can see, the potentially destructive code does not overwrite the sqrt function; the function works just like it should, and the sqrt variable resulting from the exec ed assignment is available from the scope. Note that if you try to print out scope, you see that it contains a lot of stuff because the dictionary called _ _builtins_ _ is automatically added and contains all built-in functions and values: >>> len(scope) 2 >>> scope.keys() ['sqrt', '__builtins__']

Then the vice president of technology happens to walk by and says that the slide looks unbalanced and that you should add a photograph of an IT team (lower right) In spite of everyone s good intentions to make the slide better, the combined additions made it much worse As the old saying goes, If you emphasize everything, you emphasize nothing The headline on a BBP slide already sits in the most prominent position on the original slide (upper left), so there s no need to add any embellishment to make it stand out there is an easy ow as the audience sees the headline, looks at the graphic, and listens to the speaker The emphasis on individual words disrupts easy reading of the headline (lower right) and creates unnecessary visual competition about where to look rst.

require 'Win32API' title = "My Application" text = "Hello, world!" dialog = Win32API.new('user32', 'MessageBox', 'LPPL', 'I') result = dialog.call(0, text, title, 1) case result when 1: puts "Clicked OK" when 2: puts "Clicked Cancel" else puts "Clicked something else!" end

Once you ve found the name of a gem you wish to install, you can install it with a single command at the command line (where feedtools would be replaced with the name of the gem you wish to install, although feedtools is a fine gem to test with):

The same happens when you add three more arrows to the globe and the two additional photographs they have transformed what was once a clear and easily viewable slide into a distracting hodgepodge The audience can no longer easily see the meaning.

Caution On Unix-related platforms (including OS X and Linux), you re likely to receive an error shortly thereafter, complaining that you don t have permission to install the gem. The reason for this is that Ruby is usually installed as a system application, and your current user doesn t have the privileges to install new libraries at the system level. To resolve this, you can either switch to the root user and re-run the gem install command, or use sudo: sudo gem install feedtools.

A built-in function that is similar to exec is eval (for evaluate ). Just as exec executes a series of Python statements, eval evaluates a Python expression (written in a string) and returns the

If all goes well, you ll get output like this:

8

Attempting local installation of 'feedtools' Local gem file not found: feedtools*.gem Attempting remote installation of 'feedtools' Updating Gem source index for: http://gems.rubyforge.org Successfully installed feedtools-0.2.26 Installing RDoc documentation for feedtools-0.2.26...