By Marcia Akins, Andy Kramek, Rick Schummer, John Hosier
In case you are going to exploit VFP for greater than informal GUI alterations for your application, this e-book is a wealth of information. Concise, in-depth, and a beautiful addition for your assortment.
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Additional resources for 1001 Things You Always Wanted to Know About Visual FoxPro
Well, quite a lot really because that one command can call a FoxPro program, and that can do a lot of things! g. system variables) because, when the configuration file runs, Visual FoxPro hasn't actually started. Using this setting allows you to specify a program file to run immediately after Visual FoxPro has started up – even before the command window is displayed. This program can then be used to set up your development environment the way that you really want it. F. F. 1 *** Set up any standard "Public" variables PUBLIC gcUserName, gcAppPath, gcDataPath STORE "" TO gcUserName, gcAppPath, gcDataPath *** Run Standard Path Set-up DO setpath WITH 1 As you can see, apart from setting up the basic VFP system environment and handling our own particular requirements, this 'one' command available in the configuration file has now been used to run a couple of other programs (CEE and our own SetPath procedure) so we get three for the price of one.
IF ! FILE( lcFile ) *** File not found, so create it lnHnd = FCREATE( lcFile ) IF lnHnd < 0 Chapter 1: Controlling the VFP Environment 11 *** Cannot create the file, some sort of error! T. T. ENDIF *** Return Status Flag RETURN llRetVal The function returns a logical value that can be used to determine whether to allow the current application to continue, as the following snippet illustrates: *** Check for a second instance of the application IF ChkSFile() QUIT ENDIF Of course the catch with this approach is that your application must delete the file as part of its close-down routine (unless you really want a once-only application).
One additional suggestion, if you adopt this methodology, is to place code in the Load() event of your form class which checks for a specific setting and if it is not found displays a MessageBox. DataSessionId # 1 *** We have a Private DataSession IF SET( 'MULTILOCKS' ) = 'OFF' *** Or whatever setting you ALWAYS set! ' ) ENDIF ENDIF Suppressing auto-open tables If you wish to use the Form's Load method to set options for a DataSession, you must first suppress the default behavior of the DataEnvironment that is to automatically open tables.
1001 Things You Always Wanted to Know About Visual FoxPro by Marcia Akins, Andy Kramek, Rick Schummer, John Hosier