How to Manage Differences in Stacked Pages Between Platforms (140347)

MORE INFORMATION

When you use the PageFrame control to build a form in Visual FoxPro 3.0, Visual FoxPro automatically calculates the left position of the page. You cannot modify it under program control.

In Windows 95 and Windows NT, pages are stacked as follows:

           -----------------------------
           | Page 4  | Page 5 | Page 6 |
           -----------------------------
           | Page 1  | Page 2 | Page 3 |
           -----------------------------
				

In Windows 3.1 and Windows for Workgroups, pages are stacked as follows:

              ------------------------------
              | Page 4  | Page 5  | Page 6 |
           ---------------------------------
           | Page 1   | Page 2  | Page 3 |
           -------------------------------
				

Each new row is placed 12 pixels to the right of the preceding row.

If you develop a form under Windows 95 and run it under Windows 3.1, Visual FoxPro accommodates the stepping effect by maintaining the same width for the page frame and recalculating the width of each page. The width of each page is therefore smaller. Under these conditions, if a control is placed on the right edge of a page, it might be truncated when the page is displayed on a different platform.

If a page frame with stacked pages is to be run under different platforms, place controls away from the edges of a page to prevent them from being truncated, or modify the width of the page frame when the form is run in Windows 3.1. For example, if the page frame has three rows, use the following code in the Init event of the PageFrame.

   IF VAL(SUBSTR(OS(1),9,4)) < 4.00  && Verify the Operating System
      THIS.WIDTH = THIS.WIDTH + (12.0 * 3)
   ENDIF
				

In this code, 12.0 is a constant and 3 represents the number of rows of tabs.