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Peter Liddle wrote:
well hwo the hell can that be when the parameter is valid in debug.
Two words: uninitialized variables
Check out John Newcomer's article here at CP about debug vs. release problems.
--Mike--
Buy me stuff! (Link fixed now)
Like the Google toolbar? Then check out UltraBar, with more features & customizable search engines!
My really out-of-date homepage
Big fan of Alyson Hannigan and Jamie Salé.
Sonork - 100.10414 AcidHelm
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set your compiler's warning level to 4. this will catch a lot of stuff. (project / settings / C/C++ )
-c
There ain't no second chance
Against the thing with the forty eyes
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you must also call "ZeroMemory" when passing some structs to API,if you do not call this the struct may have invalid data.
Casa.Sapo.pt
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Thats what i thought that it would be unintalised variables but i have checked loads of times and can't find any and no warnign about them are bought up.
Maximaiano whats that about zeromemory i have zeroed all my structs when i initalise them shoudl i be zeroing them somewhere else as well?
Peter
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look at this sample...
in this sample i am changing the text of one header item (CHeaderCtrl)
HDITEM hdi;
ZeroMemory(&hdi, sizeof(hdi)); //if i do not call this it will crash in release (most of the times)
hdi.mask = HDI_TEXT | HDI_FORMAT;
hdi.fmt = HDF_STRING | HDF_CENTER;
hdi.pszText = "Cool String";
m_Header.SetItem(i,&hdi);
why does it crash?
when we call SetItem we are passing all the items in the struct (hdi) not only the ones that we use (hdi.mask,hdi.fmt,hdi.pszText) and because the
the items that we didnt use may have invalid data the control crashes
the zeromemory "cleans" the struct , providing a safe way of sending a struct to a control without invalid data.
Casa.Sapo.pt
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hello!
In my MDI app, I added a handler for the OnClose message in CDocument, so I can detect if the document has changed and promt for saving; the prompt has a Cancel button that prevents the document from being closed if the user changes his/her mind 
My problem is that when the app is closed and a document has not been saved and you press the cancel button the program (obviously) crashes.
So what I want to do is call the OnClose method of all open documents before closing the main window and if one remains open prevent the app from closing. Can someone help me do this? I don't know how to reach the open documents' list from the main window.
thanks a lot!
marcela bovio
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should have done a better search in the forum before asking 
http://www.codeproject.com/script/comments/forums.asp?msg=34506&forumid=1647&kw=open+documents#xx34506xx
in case anybody else is interested
marcela bovio
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hi all,
i have a dialog based class name called smp and global function which is callback compare function for sorting ctreectrl::CSortChildrenCB();
how can i try to access member variable of smp from compare function?
i had tried by declaring as followed inside the global function:
smp *tempsmp = new smp();
AfxMessageBox(tempsmp->strName);
i got empty string...
global in vc++ is very confusing..
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you can not just create another smp... (it will instantiate a new smp object that does not have the correct strName)
you have to pass the pointer of you smp into the global function in order to access the strName
something like this:
void compare(smp* s)
{
AfxMessageBox(s->strName);
}
Casa.Sapo.pt
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I see. and thank you
i solved my problem by creating new global variable which is to be able to access from global function.
after i set my new global variable = smp local variable , the problem solved.
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try to use as few global fuctions and variable as you can...
Casa.Sapo.pt
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Hi there ( It’s my last time  ),
How can I load a JPEG file by Microsoft Forms Image 2.0 ActiveX, programically ?
There is a function:
SetPicture(LPDISPATCH newValue);
How can I pass value to first parameter of this function ?
Plz help me !
My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html
Hadi Rezaie
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Hi there again,
How can I load JPEG files without using a ActiveX in my GDI programs ?
My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html
Hadi Rezaie
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I'm sure you can find it in the articles of CP in GDI section.
Mazy
"The path you tread is narrow and the drop is shear and very high,
The ravens all are watching from a vantage point near by,
Apprehension creeping like a choo-train uo your spine,
Will the tightrope reach the end;will the final cuplet rhyme?"Cymbaline-Pink Floyd
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Hi there,
Is Microsoft Forms Image 2.0 ActiveX in all of Windows versions ?
My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html
Hadi Rezaie
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I want to study proxy severs.
Please tell me where could find the Proxy Source code??
Davidwu
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?????No body know?
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Hi!
I want to disable some menu items in my IDR_MAINFRAME menu, when I hit a Button. I have a SDI-programm with a tab control. can somebody say my what to do?
thx Michi
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You need to set a status indicator when you hit the button. Then, you need to handle the UPDATE_COMMAND_UI message.
for example:
void CSomeClass::OnButtonClick()
{
m_bEnableMenuItem = false;
}
void CSomeClass::OnUpdateUI(CCmdUI* pCmdUI)
{
pCmdUI->Enable(m_bEnableMenuItem);
}
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This might be wrong board for this question but was just trying my luck to see whether anyone here had a suggestion..
I have a situation which I am trying to solve just by creating SQL's without programming because of some installation requirements. I did not have any luck with it. Was wondering whether anyone knows of a solution :
Here is the situation-
DB2 Table 1:
------------
FirstName LastName DateOfBirth History Begin Date
--------- -------- ----------- -----------
Joe Smith 01/01/95 05/25/1997
Joe Smith 01/01/95 11/01/1997
Bob Smith 05/07/55 10/01/1998
Sherri Gaston 11/11/73 11/15/1999
Sherri Gaston 11/11/73 12/20/1999
Sherri Gaston 11/11/73 05/05/2000
Primary Key in the above table is FirstName, LastName, DateOfBirth.
From the above table I am trying to create a "daily" level table which will have a record for every primary key starting from the first history Begin Date record date to the next history Begin date.
So for example the result for "Joe Smith" will be
Joe Smith 01/01/95 05/25/1997
Joe Smith 05/26/1997
Joe Smith 05/26/1997
Joe Smith 05/26/1997
Joe Smith 05/26/1997
.........until 11/01/1997 (his last record's history begin date).
I don't mind building intermediate temporary tables. Can anyone help or thing of something?
Thank you
M
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One way I could suggest doing this is to...
1) Create a new table for dates (say -re-generate dates out 5-10 years).
2) As part of the date table have a DUMMY_COLUMN which has a value of say 1.
3) Add a DUMMY_COLUMN to your name table again with a value of 1.
4) Now you can do a join against the 2 tables and get the date range you want at any time.
This method should work in just about any database product you might use.
Another way is to write a stored procedure to build the target table. Depending on what version/platform of DB2 you are using this can be easy or very difficult. It could be written in JAVA, COBOL or whatever other language DB2 SPs support.
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But how do u do a join to let the date range start in the first record and go until the next records history date if the keys are the same.
Thank you
M
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At me some libraries are not created for VC.NET!
Whether I can establish VC.NET and VC ++ 6.0 simultaneously?
Best regards,
Eugene Pustovoyt
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