How to Disable Combo and List Boxes in Wizard-Generated Forms

ID: Q138560

3.00 WINDOWS kbtool kbhowto

The information in this article applies to:

Microsoft Visual FoxPro for Windows, version 3.0

SUMMARY

When the Form Wizard builds a form, it creates the form so that when the form runs, the objects that hold data are disabled. Clicking the Edit button enables the objects and allows editing of the information. However, if controls other than check boxes, text boxes, or OLE-bound controls are added to the form, they are enabled, not disabled, when the form is run.

This article shows you how to disable controls such as combo boxes and list boxes so that they are disabled when the form runs and enabled when the Edit button is clicked. The code that controls which objects are disabled or enabled is located in the Wizstyle.vcx form. The combo and list boxes were not included in that code, but you can modify the code to include the combo and list boxes.

MORE INFORMATION

Step-by-Step Procedure

1. On the File menu, click Open, and change Files of Type to Visual Class

   Library. In the \Vfp\Wizards\ directory, select Wizstyle.vcx. In the
   Open box, choose TXTBTNS as the Class Name. The Class Designer will
   appear and allow the editing of the wizard buttons.

2. Double-click any button. In the Object box, select TXTBTNS. In the

   Procedures box, select SETALLPROP. In this code, look for the following
   line (it is split here for readability):

   CASE ATC(m.oControlParent.Controls[m.i].BaseClass,
      "CheckBox,TextBox,OleBoundControl") # 0
          m.oControlParent.Controls[m.i].Enabled = THIS.EditMode

3. Note that CheckBox, TextBox, and OleBoundControl are the only objects

   referenced here. Add "ComboBox, ListBox, EditBox" to this line of code.

4. Save the changes, and create or open a wizard-generated form. Add a

   combo box based on a field from a table. When you run the form, note
   that the combo box is disabled until you click the Edit button.

By changing the code in the TXTBTNS class, this change will also effect the way the picture buttons in PICBTNS behave on the combo and list boxes.

Additional reference words: 3.00 VFoxWin KBCategory: kbtool kbhowto KBSubcategory: FxtoolWizscreen

Keywords          : FxtoolWizscreen 
Version           : 3.00
Platform          : WINDOWS