Article ID: 126952
Article Last Modified on 2/12/2000
APPLIES TO
- Microsoft Visual FoxPro 3.0 Standard Edition
This article was previously published under Q126952
SUMMARY
This article explains how to declare variables that exist and are visible throughout a form but are released when the form is released.
MORE INFORMATION
A variable declared in a method of a form is visible while the method is executing. Any reference to this variable after the method exits will yield a 'Variable not Found' error message. In Visual FoxPro, the Form Designer builds a Form class, and a Form is an object. Variables declared in a method such as the Init or Load are scoped to the method. A variable scoped to a Form object has to be a member variable, or property. This differs from the version 2.x model, where variables declared in the Setup of a screen would be generated at the beginning of the .SPR file, and be available to the program and procedures that the program calls.
Use the following steps to add a new property to a Form in the Form Designer:
- Choose New Property from the Form menu.
- Type the name of the member variable, and click OK in the dialog. The property is now available at the bottom of the property sheet.
- To refer to the property from an object in the Form, you can:
- Use the This object reference at the Form level. For example:
This.chvar1
- Use the ThisForm object reference at the Object level. For example:
ThisForm.chvar2
- Use the name of the Form reference. For example:
Frmtest.chvar1
- Use the This object reference at the Form level. For example:
Additional query words: VFoxWin screen private
Keywords: KB126952
