How Visual FoxPro Organizes and Accesses Wizards (128728)
The information in this article applies to:
- Microsoft Visual FoxPro for Windows 3.0
This article was previously published under Q128728 SUMMARY
This article describes how Visual FoxPro knows that a Wizards exists and
when to use it.
MORE INFORMATION
When you install Visual FoxPro, the _Wizard system memory variable is
initialized to point to the application that will function as the main
controller for all the wizards. By default, the variable contains
WIZARD.APP, installed in the main Visual FoxPro directory. This application
is activated each time you choose to run a wizard.
WIZARD.APP uses a registration table named WIZARD.DBF to store Information
regarding the various wizards and to determine which Wizard to run. This
table has the following structure:
Field Field Name Type Width Dec Index Collate Nulls
--------------------------------------------------------------------
1 NAME Character 45 No
2 DESCRIPT Memo 4 No
3 BITMAP Memo 4 No
4 TYPE Character 20 No
5 PROGRAM Memo 4 No
6 CLASSLIB Memo 4 No
7 CLASSNAME Memo 4 No
8 PARMS Memo 4 No
** Total ** 90
Each record in WIZARD.DBF represents a wizard. The contents of the Name
field is used as the text for the Wizard Selection dialog.
The Type field determines the Visual FoxPro File Type that the Wizard is
associated with. For example, if the Type is REPORT, then that Wizard will
be opened whenever you choose to create a new Report. If two or more
wizards are of the same Type, the Wizard Selection dialog is displayed
when you choose to run a wizard. The dialog lists the various wizards for
the specific file type.
The contents of the Description field are displayed in the Description box
of the Wizard Selection dialog.
When the user runs a certain wizard, WIZARD.APP runs the program specified
in the Program field of the wizard. If the program is not in the Wizards
directory, you must specify the path. If the Program field is blank, an
instance of the class, as specified by the Classlib and Classname fields,
is created.
The Parms field can be used to specify parameters sent to the Wizard when
it is executed. For example, WZREPORT.APP contains the Report, One-To-Many
Report, and Group/total Report Wizards. Therefore, depending on which
wizard you select, the Parms field is used to pass REPORT, 1MANY, or the
GROUP parameters respectively to WZREPORT.APP to determine which specific
Report Wizard is to be activated.
Modification Type: | Major | Last Reviewed: | 2/12/2000 |
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Keywords: | KB128728 |
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