Toggle Maindialog to hParent dialog

[Kev Peel]

Check ARRAYATTR(arrayname, 0) or ARRAYATTR(arrayname, 3), You may be accessing the array before it's dimensioned. This is an easy mistake to make if, for example, the array is dimensioned in WM_INITDIALOG and accessed in response to another message that is received before WM_INITDIALOG.

The message order is never guaranteed in a queue-based system like Windows.

[BRENT GARDNER]

Looks like hDlg54 needs to send a user message to close. Seems to
work now, I just sent user message like in maindialog, but with a different number and haven't been getting any errors! Knock on wood.

[Michael Mattias]

Thank you for posting the code.

After careful review, drawing on my many years of experience, risking my entire reputation and doing it all at no charge, I will state that no statement in the code posted can cause a page fault and your problem is elsewhere.

MCM

[BRENT GARDNER]

Lastest error: Program caused invalid page fault in module USER.EXE at 0008:0000185f. Program seemed to work fine, even pressing hot keys until I pressed "x" for the [E&xit] button. Then got above error?
Seems like the old Windows 98 1 key press execution to quit causes this?
Is there a message I can send? If I left mouse click on [E&xit] button,
no error?

Maindialog(hDlg) Case that calls hDlg54:
[CODE]
CASE 17 ' <v %ID_VIEW
CBID = 17: KEYP = 9 ' Stop music with left Mouse click on button
IF KEYP = 9 THEN
CONTROL SEND CBHNDL, %ID_VIEW, %BM_SETSTATE, %TRUE, 0
SLEEP 50
CONTROL SEND CBHNDL, %ID_VIEW, %BM_SETSTATE, %FALSE, 0
END IF

DIALOG DISABLE hDlg
DIALOG SHOW STATE hDlg, %SW_MINIMIZE
DialogActFlg = 1 ' for redraw hDlg54
' Toggle to hDlg54, SUB ViewBookPage
CALL ViewBookPage
DIALOG ENABLE hDlg
DIALOG SHOW STATE hDlg, %SW_NORMAL
FUNCTION = 1

KEYP = 0
' So Red rectangle will show around button, 10-7-2007
CONTROL SET FOCUS hDlg, %ID_VIEW
[CODE/]
Sample code for Sub and callback
[CODE]
SUB ViewBookPage
' Set/Display the 1st address from the UDT array into the GUI
UdtViewPageDialog hDlg54, gCurrentEntry
KEYP = 0

DIALOG SHOW MODAL hDlg54, CALL ViewBookPageCallBack

DIALOG END hDlg54
hDlg54 = 0
END SUB

CALLBACK FUNCTION ViewBookPageCallBack
CASE %IDB_CNSL ' [E&xit] = 1053
IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
ssec=0 'reset time on exit
FIRPOS = 0: CURRPOS = 0: INDX = 0
DialogActFlg = 0 ' if 1, called by hDlg54
DIALOG END CBHNDL, 1 ' end dialog
END IF
FUNCTION = 1
end function
[CODE/]

[Michael Mattias]

A "Stack or Page Fault" ("GPF") is the result of a program error.

Program errors are caused by errors in your source code.

Your source code cannot be analyzed and debugged by telepathy.

MCM

[BRENT GARDNER]

The array is a string of about 1850. The wierd thing is, that after testing
numerous times on 98, and calling from different places, I get STACK
OR PAGE FAULT IN KERNEL32.DLL at 017f:bff7429e. But, it seems to
only happen when I press hot key, but not if left mouse click on button?
Stumped!!

[Cliff Nichols]

How big of an array?
Can you show sample code that demonstrates the problem?

[BRENT GARDNER]

Hi,

My program starts by loading array and many files. It calls a hParent dialog with a certain view. When users Quits, Maindialog is opened.
There is a button, when executed, will call hParent dialog, but need to close maindialog while hParent dialog is running?
In Windows XP, works fine. Problem in Windows 98, get Stack Fault
in module kernel32.dll?

I am assuming that there are too many string variables with both dialogs
opened at same time.