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Visual Basic » 14.12.2008 » by gearup
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.. 5.6 / 10 .. (14 votes)
The basic idea behind this chapter is to display the Help information to the user...
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Visual Basic » 14.12.2008 » by gearup
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.. 6.0 / 10 .. (13 votes)
You will learn different ways to trap errors when they occur and to handle different error situations. In this chapter, recommendations for creating common error handling procedures are provided along with examples of how error information should be presented to the user...
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Visual Basic » 14.12.2008 » by gearup
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.. 5.3 / 10 .. (16 votes)
Input validation is an important part of any computer application that requires user interaction. In its broadest sense, the concept applies to anything that the application does to ensure that data entered by the user is acceptable for the purposes of the application...
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Visual Basic » 14.12.2008 » by gearup
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.. 5.4 / 10 .. (9 votes)
Programmers can use Active Documents to provide a variety of new services previously unavailable...
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Visual Basic » 14.12.2008 » by gearup
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.. 5.9 / 10 .. (13 votes)
In this lesson, we learn how to interact with another underlying set of code by programming the Windows applications interface (API) using dynamic link libraries (DLL)...
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Visual Basic » 14.12.2008 » by gearup
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.. 3.9 / 10 .. (10 votes)
Visual Basic responds to various mouse events, which are recognized by most of the controls. The main events are MouseDown, MouseUp and MouseMove. MouseDown occurs when the user presses any mouse button and MouseUp occurs when the user releases any mouse button...
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Visual Basic » 14.12.2008 » by gearup
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.. 5.9 / 10 .. (12 votes)
The CheckBox control is similar to the option button, except that a list of choices can be made using check boxes where you cannot choose more than one selection using an OptionButton. By ticking the CheckBox the value is set to True...
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Visual Basic » 14.12.2008 » by gearup
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.. 6.4 / 10 .. (11 votes)
Displays a message in a dialog box and wait for the user to click a button, and returns an integer indicating which button the user clicked.
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Visual Basic » 14.12.2008 » by gearup
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.. 5.9 / 10 .. (11 votes)
Displays a prompt in a dialog box, waits for the user to input text or click a button, and returns a String containing the contents of the text box.
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Visual Basic » 14.12.2008 » by gearup
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.. 5.5 / 10 .. (11 votes)
Error Handling enables programmers to write clearer, more robust, more fault-tolerant programs. Error handling enables the programmer to attempt to recover (i.e., continue executing) from infrequent fatal errors rather than letting them occur and suffering the consequences...
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