How To Add Controls to a Form Generated by the Form Wizard

MORE INFORMATION

The Form Wizard uses the Wizstyle visual class library. Code for the navigation buttons is stored in this library. When a text box is added to the form, it functions exactly like the text boxes added by the wizard. It is enabled and disabled by the edit/revert and add/save buttons. However, if another control, such as a combo or list box, is added, it's not enabled or disabled by these buttons, so it remains enabled all the time.

Listed below are two different methods to add this functionality. The first one works on combo and list boxes. The second method, which is not supported by Microsoft Technical Support applies to combo boxes only.

Method 1 - List and Combo Box

The list and combo box can be enabled and disabled in sync with the text boxes by setting the enabled property of list or combo box to false and adding the following code to the edit/revert and add/save buttons, assuming combo1 is the name of the added combo box and text1 is the name of an existing text box on the form:

   txtbtns.cmdEdit::click     && cmdEdit will be cmdAdd for the Add button
   thisform.combo1.enabled= thisform.text1.enabled   && See following NOTE
   thisform.refresh
					

NOTE: This code causes the combo box to become enabled and disabled in sync with the text box. The first line of code with the scope resolution operator ensures that the click method of the Edit button stored in the WIZSTYLE.VCX is executed.

Method 2 - Combo Box

NOTE: Modifications to WIZSTYLE.VCX are not supported by Microsoft FoxPro Technical Support. This information is provided for informational reasons only.

Modify the SetAllProp method of the TxtBtns class in WIZSTYLE.VCX as follows:

1. Change the line

         CASE ATC(m.oControlParent.Controls[m.i].BaseClass,
         "Checkbox,TextBox,OleBoun Control") # 0
   							

   to

         CASE ATC(m.oControlParent.Controls[m.i].BaseClass,
         "CheckBox,TextBox,OleBoun Control,ComboBox") # 0
   							

   NOTE: The CASE statements above should actually be continuous lines. They were broken into two lines here for display purposes only.

This will allow combo boxes added to any Form Wizard-generated forms to be enabled and disabled along with other objects, so long as the enabled property is initially set to .F. for each new control.