Q190818: HOWTO: Programmatically Scroll a Visual FoxPro Form

Article: Q190818
Product(s): Microsoft FoxPro
Version(s): WINDOWS:6.0
Operating System(s): 
Keyword(s): 
Last Modified: 12-AUG-1999

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The information in this article applies to:

- Microsoft Visual FoxPro for Windows, version 6.0 
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SUMMARY
=======

Unlike the grid control, which has a scroll method that can be called to
programmatically scroll through the grid records, a form has no such method.

You must use the SetViewPort method to programmatically scroll a Visual FoxPro
6.0 form.

MORE INFORMATION
================

The following sample form programmatically scrolls using the Page Up and Page
Down keys:

  Sample Code
  -----------

     PUBLIC oform
     oform=NewObject("ScrollForm")
     oform.show

     DEFINE CLASS ScrollForm AS form
        Top = 0
        Left = 0
        Height = 101
        Width = 168
        ScrollBars = 2
        Caption = "Use PgUp/PgDwn to Scroll Form"
        vertscrollpos = 0
        Name = "Form1"
        ADD OBJECT shape1 AS shape WITH ;
           Top = 12, ;
           Left = 12, ;
           Height = 421, ;
           Width = 553, ;
           Name = "Shape1"
        ADD OBJECT command1 AS commandbutton WITH ;
           Top = 24, ;
           Left = 36, ;
           Height = 27, ;
           Width = 84, ;
           Caption = "Close", ;
           Name = "Command1"
        PROCEDURE KeyPress
           LPARAMETERS nKeyCode, nShiftAltCtrl
           IF nKeyCode=3
              Thisform.vertscrollpos=Thisform.vertscrollpos+Thisform.height
              Thisform.SetViewPort(0,Thisform.vertscrollpos)
              Thisform.Refresh
           ENDIF
           IF nKeyCode=18
              Thisform.vertscrollpos=Thisform.vertscrollpos-thisform.height
              Thisform.SetViewPort(0,Thisform.vertscrollpos)
              Thisform.Refresh
           ENDIF
        ENDPROC
        PROCEDURE command1.Click
           thisform.release
        ENDPROC
     ENDDEFINE

Additional query words: kbOOP kbVFp600

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Keywords          :  
Technology        : kbVFPsearch kbAudDeveloper kbVFP600
Version           : WINDOWS:6.0
Issue type        : kbhowto

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