Microsoft KB Archive/175983

= PRB: Extra Menu Pad Added if Modal Screen Called 31 Times =

Article ID: 175983

Article Last Modified on 5/10/2003

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APPLIES TO


 * Microsoft Visual FoxPro 3.0 Standard Edition
 * Microsoft Visual FoxPro 3.0b Standard Edition
 * Microsoft Visual FoxPro 5.0 Standard Edition
 * Microsoft Visual FoxPro 5.0a
 * Microsoft Visual FoxPro 6.0 Professional Edition
 * Microsoft FoxPro 2.5b
 * Microsoft FoxPro 2.5a
 * Microsoft FoxPro 2.5b
 * Microsoft FoxPro 2.6 Standard Edition
 * Microsoft FoxPro 2.6a Standard Edition

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This article was previously published under Q175983



SYMPTOMS
In Visual FoxPro for Windows or in FoxPro for Windows 2.x, specific circumstances make an additional menu pad appear, that causes unpredictable problems if the menu pad is selected.

The additional menu pad is a duplicate of the next-to-last menu pad.

All of the following circumstances have been noted to exist when this condition occurs:
 * Menu pads have a SKIP FOR condition to disable them.
 * More than six menu pads with five characters in each pad are required.
 * A MODAL screen is being displayed when the extra menu pad appears.
 * The problem occurs only if a screen is activated by a READ MODAL that is being called from within a DO WHILE loop.
 * The extra menu pad appears on the 31st time the MODAL screen is called.
 * If you exit the program, without exiting FoxPro, and then rerun the program, the number of times that the MODAL screen must be called before the extra menu pad is displayed decrements by one. Then, during this second running of the program, the extra menu pad appears during the 30th appearance of the MODAL screen. In a multi-user environment, this creates a random appearance of the extra menu pad.

This problem does not occur in FoxPro for DOS.



CAUSE
This behavior appears to be caused by a combination of the looping of the MODAL READ (screen) and the SKIP FOR conditions on the menu pads.



RESOLUTION
A workaround is to call the Menu.mpr program again at the end of the DO loop, so that the last line of code in the Main.prg before the ENDDO is: DO Testmnu.mpr This additional calling of the menu has the effect of re-setting whatever internal counter is causing the extra menu to appear on the 31st run of the MODAL screen. However, in a multi-user environment this workaround may not prevent the behavior.



STATUS
Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article.



Steps to Reproduce Behavior
Included below are three sample programs, Main.prg, Testmnu.mpr, and Testapp.spr.

Main.prg is the initial calling program that calls the sample menu allowing the selection of a menu pad that calls the sample modal screen. Testmnu.mpr is a sample menu and Testapp.spr is a sample modal screen.  Select the text below from the comment box that identifies the beginning of Main.prg to the comment box that identifies the end of Main.prg and press CTRL+C, or you may click COPY on the Edit menu.  In the FoxPro Command window, type the following command: MODIFY COMMAND Main.prg  You will see a new program window. Press CTRL+V or click PASTE on the Edit menu, and then save the program. Repeat steps 1-3 for the two other programs Testmnu.mpr and Testapp.spr.  In the FoxPro Command window, type the following command: DO main.prg </li> On the application's main menu, click the Test Bar pad from the Test Pad 1 menu or press ALT+T. This displays a modal screen that has an Exit command button. Notice that the menu pads, with the exception of the Exit menu pad, are disabled and cannot be selected. Also notice that the "Menu hit count" is displayed on the FoxPro desktop.</li> Click the Exit button on the modal screen, or press ALT+E. Note that the menu pads are again enabled.</li> Repeat steps 6 - 7 until the "Menu hit count" display reaches 30.</li>  Repeat step 6 to call the modal screen once more. While it is being displayed, notice that a second pad named Test Pad 7, has been added to the end of the other menu pads (prior to the Exit pad) and that unlike the other menu pads, it seems to be enabled. However, if selected, Test Pad 7 has no menu choices and sometimes causes erratic menu behavior. *      *********************************************************      *       *      *       * 10/20/97             Main.prg              16:46:24 *      *      *       *********************************************************      *       *      *       * Description: *      * This main program is one of three sample programs that *      * illustrates the problem of an extra menu pad appearing *      * during the 31st display of a MODAL screen. *      *      *       *********************************************************

CLEAR ll_fread = .f.     lc_pad = "" ln_bar = 0 lc_choice = "" m0sysoff = .f.     ln_count = 0 PUSH MENU _msysmenu DO TESTMNU.MPR

DO WHILE .T.        ll_fread = .f.         READ VALID ll_fread ll_fread = .t.

DO CASE

CASE UPPER(lc_pad) = "TEST BAR" ln_count = ln_count + 1 @ 2, 35 SAY "Menu hit count " + STR(ln_count) DO TESTAPP.SPR

CASE UPPER(lc_pad) = "QUIT TO FOXPRO" CLEAR RELEASE ln_count EXIT

ENDCASE

ENDDO

POP MENU _msysmenu RETURN

PROCEDURE l_actmnu PARAMETERS lc_parm1 ll_fread = .t.     CLEAR READ lc_bar = BAR lc_pad = lc_parm1

RETURN

*      *********************************************************      *       *      *       *                  END OF Main.prg *      *      *       *********************************************************

*      *********************************************************      *       *      *       * 10/20/97             Testmnu.mpr              16:46:24 *      *      *       *********************************************************      *       *      *       * Description: *      * This menu program is one of three sample programs to      *       * illustrate the problem of an extra menu pad appearing *      * during the 31st display of a MODAL screen. *      *      *       *********************************************************

SET SYSMENU TO     SET SYSMENU AUTOMATIC

DEFINE PAD tp1 OF _MSYSMENU PROMPT "Test Pad \<1" ; COLOR SCHEME 3 ; KEY ALT+1, "ALT+1" ; SKIP FOR m0sysoff DEFINE PAD tp2 OF _MSYSMENU PROMPT "Test Pad 2" ; COLOR SCHEME 3 ; SKIP FOR m0sysoff DEFINE PAD tp3 OF _MSYSMENU PROMPT "Test Pad 3" ; COLOR SCHEME 3 ; SKIP FOR m0sysoff DEFINE PAD tp4 OF _MSYSMENU PROMPT "Test Pad 4" ; COLOR SCHEME 3 ; SKIP FOR m0sysoff DEFINE PAD tp5 OF _MSYSMENU PROMPT "Test Pad 5" ; COLOR SCHEME 3 ; SKIP FOR m0sysoff DEFINE PAD tp6 OF _MSYSMENU PROMPT "Test Pad 6" ; COLOR SCHEME 3 ; SKIP FOR m0sysoff DEFINE PAD tp7 OF _MSYSMENU PROMPT "Test Pad 7" ; COLOR SCHEME 3 ; SKIP FOR m0sysoff DEFINE PAD exitpad OF _MSYSMENU PROMPT "\<Exit" ; COLOR SCHEME 3 ; KEY ALT+E, "ALT+E" ON PAD tp1 OF _MSYSMENU ACTIVATE POPUP testpad1 ON PAD exitpad OF _MSYSMENU ACTIVATE POPUP exit

DEFINE POPUP testpad1 MARGIN RELATIVE SHADOW COLOR SCHEME 4 DEFINE BAR 1 OF testpad1 PROMPT "\<Test Bar" ; KEY ALT+T, "Alt+T" DEFINE BAR 2 OF testpad1 PROMPT "test1"

ON SELECTION BAR 1 OF testpad1 DO l_actmnu WITH PROMPT

DEFINE POPUP exit MARGIN RELATIVE SHADOW COLOR SCHEME 4 DEFINE BAR 1 OF exit PROMPT "Quit to Foxpro" DEFINE BAR 2 OF exit PROMPT "Do something else 1" DEFINE BAR 3 OF exit PROMPT "Do something else 2" ON SELECTION BAR 1 OF exit DO l_actmnu WITH PROMPT

*      *********************************************************      *       *      *       *                  END  OF  Testmnu.mpr *      *      *       *********************************************************

*      *********************************************************      *       *      *       * 10/20/97             TESTAPP.SPR              16:46:24 *      *      *       *********************************************************      *       *      *       * Description: *      * This screen program is one of three sample programs that *      * illustrates the problem of an extra menu pad appearing *      * during the 31st display of a MODAL screen. *      *      *       *********************************************************

DEFINE WINDOW test ; AT 0.000, 0.000  ; SIZE 15.846,92.600 ; FONT "MS Sans Serif", 8 ; FLOAT ; NOCLOSE ; MINIMIZE ; SYSTEM MOVE WINDOW test CENTER

#REGION 1 m0sysoff = .t.

#REGION 1 IF WVISIBLE("test") ACTIVATE WINDOW test SAME ELSE ACTIVATE WINDOW test NOSHOW ENDIF @ 12.000,36.800 GET lc_choice ; PICTURE "@*HN \<Exit" ; SIZE 1.8,10.000,1.0 ; DEFAULT 1 ; FONT "MS Sans Serif", 8 ; STYLE "B" ; VALID lc_val

IF NOT WVISIBLE("test") ACTIVATE WINDOW test ENDIF

READ CYCLE MODAL RELEASE WINDOW test

#REGION 1 m0sysoff = .f.

FUNCTION lc_val   &&  lc_choice VALID CLEAR READ RETURN *      *                  END OF Testapp.spr </li></ol>

Keywords: kbprb KB175983

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