C / C++ / MFC

Igor Sukhov9-Jun-01 6:36

Igor Sukhov

9-Jun-01 6:36

Try to "Search" Tab in MSDNL. =)

ps: I've faced this function when I've been programming SnapIn.

ps2:here is the local address in my hard disk: (but I'm not sure that URL will be correctly displayed in forum):

mk:@MSITStore:C:\Program%20Files\Microsoft%20Visual%20Studio\MSDN\2000OCT\1033\period99.chm::/html/VC99A01.htm

Best regards,

-----------
Igor Soukhov (Brainbench/Tekmetrics ID:50759)
igor_soukhov@yahoo.com | ICQ:57404554 | http://siv.da.ru

Anders Molin9-Jun-01 7:20

9-Jun-01 7:20

Found it

- Anders

Money talks, but all mine ever says is "Goodbye!"

Hadi Rezaee9-Jun-01 8:33

9-Jun-01 8:33

Hi Andres,
You A2OLE isn't good for use in long strings ?

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Anders Molin9-Jun-01 8:56

9-Jun-01 8:56

If you use a standard stacksize and convert more than 1 mb with the ATL macro's, you get a stack overflow error, and your app. crashes...

- Anders

Money talks, but all mine ever says is "Goodbye!"

Hadi Rezaee9-Jun-01 9:14

9-Jun-01 9:14

So, if my data was more 1 MB then i must use _alloca() ?

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Igor Sukhov9-Jun-01 9:39

Igor Sukhov

9-Jun-01 9:39

No, it means you should change stack size. (in linker's options)...

ps: it's a never-ending thread =)

Best regards,

-----------
Igor Soukhov (Brainbench/Tekmetrics ID:50759)
igor_soukhov@yahoo.com | ICQ:57404554 | http://siv.da.ru

Anders Molin9-Jun-01 10:03

9-Jun-01 10:03

I don't think changing stack size is such a good idea.
If you change data you don't know the size of, at compiletime, you never know if your program works...

ps: it's a never-ending thread =)
Yep Wink | ;)

- Anders

Money talks, but all mine ever says is "Goodbye!"

Anders Molin9-Jun-01 10:01

9-Jun-01 10:01

Nope, the ATL conversion macro's uses _alloca(), which allocates on the stack.

If you want to convert, say 5 mb, you cannot use theese macro's, but have to do it in another way, where you can allocate your memory on the heap...

- Anders

Money talks, but all mine ever says is "Goodbye!"

Hadi Rezaee9-Jun-01 21:05

9-Jun-01 21:05

A2OLE allocate memory from stack ?
Or do you mean SysAllocString for BSTR strign ???

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Anders Molin9-Jun-01 22:56

9-Jun-01 22:56

A2OLE allocate memory from stack?

Yes

- Anders

Money talks, but all mine ever says is "Goodbye!"

Hadi Rezaee9-Jun-01 23:46

9-Jun-01 23:46

Good, so how can i allocate memory from heap for A2OLE ?

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Database question ...

Hadi Rezaee8-Jun-01 20:46

Re: Database question ...

8-Jun-01 20:46

Hi all.
What is Requery() ???
Is it for refresh recordset ?
So, when i add/new/delete/edit each record, i must use it ?

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Steve Driessens8-Jun-01 20:52

Steve Driessens

8-Jun-01 20:52

G'day Hadi,

Requerying a recordset is functionally similar to closing and re-opening the recordset without some of the overhead.

It's useful for those situations where you open a recordset which is sorted on a particular field. Now, say you add some records to the set. These new records 'appear' at the end of the recordset and not necessarily in their properly sorted position in the recordset. Just call Requery() and all of the records will be re-sorted.

I hope this makes sense.

Steve

Re: Database question ...

Hadi Rezaee8-Jun-01 22:53

save diolog when cloding the application

8-Jun-01 22:53

Hi steve.
Thank you for useful answer ...
Smile | :)

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

mr20038-Jun-01 20:15

mr2003

8-Jun-01 20:15

hi,
I like to know how can the save dialog can appear when i click on the close button to close my application.

Thanks
Ehsan

Ehsan Behboudi

Christian Graus8-Jun-01 20:27

Christian Graus

8-Jun-01 20:27

I do it in an MDI App in my MainFrame OnClose handler like this:

CWinApp* pApp = AfxGetApp();
POSITION posTemplate = pApp->GetFirstDocTemplatePosition();

while (posTemplate)
{
CDocTemplate* pTemplate = pApp->GetNextDocTemplate(posTemplate);

POSITION posDocument = pTemplate->GetFirstDocPosition();

while(posDocument)
{
CDocument* pDoc = pTemplate->GetNextDoc(posDocument);
if (pDoc)
{
CGrausPaintDoc* pGPDoc = (CGrausPaintDoc*) pDoc;
if (!pGPDoc->m_bSaveSinceLastChange)
{
CString s;
if (pGPDoc->m_Filename.GetLength()>0)
s.Format("%s - save before close ?",pGPDoc->m_Filename);
else
s = "Untitled - save before close ?";
DWORD response = AfxMessageBox(s,MB_YESNOCANCEL | MB_ICONQUESTION);
switch (response)
{
case IDYES:
pGPDoc->OnSaveDocument(pGPDoc->m_Filename);
case IDNO:
pGPDoc->m_bSaveSinceLastChange = true;
pGPDoc->OnCloseDocument();
break;
case IDCANCEL:
return;
}
}
}
}
}

Most of this code is just to step through all the open documents - if you have an SDI app, you just need to get the Doc *, check a flag you set for changes (users will hate being asked to save if they have not done anything to the document ) and call OnSaveDocument. You'll note I also allow the user to press cancel - if they are being prompted they should get a chance to decide not to close the program.

Christian

#include "std_disclaimer.h"

People who love sausage and respect the law should never watch either one being made.

The things that come to those who wait are usually the things left by those who got there first.

Tomasz Sowinski9-Jun-01 2:59

Tomasz Sowinski

9-Jun-01 2:59

Wasn't standard MFC implementation enough? And what's difference between m_bSaveSinceLastChange and CDocument::SetModifiedFlag/IsModified?

Tomasz Sowinski -- http://www.shooltz.com.pl

Christian Graus9-Jun-01 3:08

Christian Graus

9-Jun-01 3:08

I presume you're telling me MFC has a flag built in that does the same thing ? The difference then would be one of control, but I admit to having vague recollections of the flag you're talking about and not knowing about it at all when I implimented the code I posted.

Christian

#include "std_disclaimer.h"

People who love sausage and respect the law should never watch either one being made.

The things that come to those who wait are usually the things left by those who got there first.