DOCUMENT:Q138918 11-FEB-2000 [foxpro] TITLE :How to Make a Modal List Box on a Form PRODUCT :Microsoft FoxPro PROD/VER:WINDOWS:3.0 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual FoxPro for Windows, version 3.0 ------------------------------------------------------------------------------- SUMMARY ======= When doing data entry there are times when you want the user to make a selection before moving on. This article shows how to make a list box that the user cannot leave until they make a selection. MORE INFORMATION ================ If you are not familiar with creating classes or using the Form Designer and the different controls please see Chapters 9 - 11 in the Developer's Guide. Steps to Make a Modal List Box ------------------------------ 1. Create a new class based on a Container. Name it MyList, and store it in Mylib. 2. Set the following Properties for the MyList container: BackStyle = "0-Transparent" (without the quotation marks) BorderWidth = "0" (without the quotation marks) Height = "195" (without the quotation marks) Width = "165" (without the quotation marks) 3. Add a new Property to the class, and call it Flag. 4. Add a list box to the container, and set the following properties for the list box: Height = "190" (without the quotation marks) Left = "3" (without the quotation marks) Top = "3" (without the quotation marks) Width = "160" (without the quotation marks) RowSourceType = "1-Value" (without the quotation marks) RowSource = "One,Two,Three" (without the quotation marks) 5. In the GotFocus event of MyList, enter the following code: This.Flag = .F. 6. In the LostFocus event of MyList, enter the following code: IF !This.Flag This.List1.SetFocus ENDIF &&Returns focus to the list if no selection is made 7. In the Click event of List1, enter the following code: IF !This.Parent.Flag This.Parent.Flag = .T. ENDIF &&Lets them leave if they click to make a selection. 8. In the Valid event of List1, enter the following code: IF !This.Parent.Flag This.Parent.Flag = .T. ENDIF &&Lets them leave if they made a selection with the keyboard. 9. Save the class, and then close the Class Designer. 10. Create a new Form. 11. Place a text box on the form, and then place the MyList container class on the form. Then place a second text box on the form. Save the Form and then run it. If you press the TAB key to move into the list box, you will not be able to press the TAB key to move back out unless you pick an item from the list using the mouse or keyboard. Additional query words: VFoxWin ====================================================================== Keywords : Technology : kbVFPsearch kbAudDeveloper kbVFP300 Version : WINDOWS:3.0 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2000.