Look at using HTML, hyperlinks, and formatting in your DataGrid, plus figure out color-coding and the many different ways of allowing the user to select rows.
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Learn how to administer a database remotely using XMLHTTP and ADOX in Visual Basic.
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Learn to implement exception handling mechanism in C++.
Computer software used to be written for serial computation by a serial computer. Circumvent that concept and work in parallel streams.
Learn how to map and un-map network drives from your VB code.
It's good practice to use code metrics to validate code; it will improve code quality and make your application maintainable and less complex.