We are currently planning for the next several issues of Code of the Week. If you have any suggestions of source code that you would like to see covered, please jump to our feedback page at http://www.codeoftheweek.com/feedback.html and let us know.
The source code in this issue is designed for all versions of Visual Basic 4.0 or greater. It should work in 16-bit and 32-bit modes. Similiar techniques can be used in VB 3.0.
We will introduce the first version of a logging class (this is an issue that will probably be enhanced later on this year depending on user feedback). There are several instances where having a log file of the events that occur, procedures called and variable values while running your application are useful. This logging class lets you include statements throughout your code to be written out to a log file.
A couple of situations where this is useful are:
Here is a sample of what a log file might look like:
10/28/97 6:04:19 PM Started Log File ---------------------------------------- 10/28/97 6:04:23 PM Enter cmdActions Index = 2 10/28/97 6:04:23 PM Loading text box from E:\cotw\projects\0008\DEBUG.LOG 10/28/97 6:04:23 PM Exit cmdActions Index = 2 10/28/97 6:04:36 PM Ended Log File ----------------------------------------
Public gLogFile as New cLogFile gLogFile.Active = True gLogFile.Output "Here's a line for the log file" gLogFile.Push "This should be indented one level" gLogFile.Push "This should be indented another level" gLogFile.Pop "This should be unindented one level" gLogFile.Pop "This should be unindented another level" gLogFile.Active = False
Putting the Public definition in a BAS module probably makes the most sense since it can then be used throughout your entire application.
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If you would like to see this class module enhanced to include additional features, drop us an email at firstname.lastname@example.org and if we get some good response we will enhance the source code shown in this issue. Some enhancements are including an option to show available memory and resources to help find places in your code where resources are being lost.
That concludes this issue of COTW. We hope you find the source code useful in your development.
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