Using global flags to indicate runtime errors has many disadvantages: Global variables are problematic in multithreaded environments. In addition, programmers might forget to test the value of the global error
The typical way of entering user-specified data into a list box is one entry at a time; however, you can accept multiple delimited entries at once and add them to
When SQL Server 7.0 uses memory dynamically, it queries the system periodically to determine the amount of free physical memory available. Though this configuration is recommended, you can still set
The IntelliSense feature of Visual InterDev is very handy, but it may induce you to add bugs to your code. For example, when you are using a recordset object’s Open
Even with better tools, sometimes you still have to use the good old Response.Write to print out debug statements to your ASP. The downside to this technique is that you
The RETURN keyword lets you exit from a T-SQL batch or stored procedure. You can specify an optional integer variable with RETURN to pass a status value to the calling
If a RichTextBox control has the focus in a Multiple Document Interface (MDI) child form, it doesn’t properly regain the focus after your application loses and regains focus. To fix
In general, every user tends to work on a separate database on the server during the development phase of an application. It can be annoying for users to repeatedly change
It is possible to see if a check box has been checked or not in JavaScript. This may come in handy during form validation. A check box has a checked