generate barcode using vb.net 21: Reporting in VB.NET

Maker QR in VB.NET 21: Reporting

21: Reporting
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22
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Licensing Your Application
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Proper .NET content licensing can mean the difference between marketplace dominance and financial bankruptcy. And I m just talking about trying to understand the license agreement that comes with Visual Studio. You still have to figure out a licensing method for your own application before you send it to your customers. Licensing and license agreements are an essential means of protecting the intellectual property you ve worked so hard to develop. How does licensing work The key is found in the roots of the word itself: license comes from li- (to tell a lie) and -cense (from cents as in pennies ). Together, these roots mean to tell lies about small units of currency. The confusion brought about in trying to figure out what this means keeps the bad guys perplexed and occupied long enough so that they don t steal your application. If this method doesn t work, there are software solutions, some of which I ll review in this chapter. Part of the discussion focuses on designing a licensing system that will appear in the Library Project. The .NET Framework does include classes for component licensing but they are primarily used for designers of controls used by other programmers within the Visual Studio IDE, and not for end-user applications. We will not be covering these licensing features in this chapter. If you re curious about such features, start by reading about the License Compiler (lc.exe) in the Visual Studio online help.
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Software Licensing Options
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Back in the early days of software, licensing wasn t an issue: if you could get to the computer, it was because you were authorized. All user interaction with the system was through the programmers and technicians. If some user wanted to steal something, it would be in the form of 20 tons of steel, wires, and vacuum tubes. Fun Yes. Easy No.
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Today, it s a different story. Most users are non-technical, and some are unethical. So, now we have licensing agreements and teams of lawyers to back it all up. But we also have software, software that can delicately enforce some of the rules. For a particular piece of software, there is still the question of How much licensing enforcement code do I add to my application The amount of software control you include will fall somewhere in the Freedom Security continuum shown in Figure 22-1.
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Perhaps here
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Freedom
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Security
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If you go for the Freedom end of the spectrum ( convenient for users and hackers ), you will have to go on the trustworthiness of your users, and any armed guards you have dispatched to their offices, to keep the program in compliance. At the Security end of the scale ( secure for programmers and highly paid law firms ), the software implements practices and policies that ensure that only licensed users of the application ever use or install it; no armed guards needed. The rest of this section discusses some possible options you could choose within the Freedom Security range.
License Agreement Only
The license agreement-only method clearly opts for freedom over security. When you supply the user with software, it comes with a carefully crafted license agreement that lays out the terms of use for both the user and the software supplier. It generally gives the user certain rights as to installation, use, and distribution of the software. When you write an application for use only within a specific organization or by a small group of users who you will have regular contact with, the license agreementonly method may be just what you need. In fact, I would bet that most Visual Basic applications are in this vein. Microsoft has announced over the years that the vast majority of Visual Basic programmers target their applications for use in a specific business organization, tied to a specific custom database. Such systems often require very little in the way of license enforcement, since the application is useless when carried outside the building where it was meant to reside. Even if your software achieves widespread distribution, this licensing scheme may still be the way to go. Many open source applications, including a major operating system that rhymes with Plinux, use the Free Software Foundation s GNU General Public License (http://www.fsf.org/licensing/licenses/gpl.html) as their primary licensing and distribution policy.
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