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Well techincally it would be like this:
class A
{
public:
int m_i;
float *m_pf;
int operator->() const
{
return m_i;
}
float& operator*() const
{
return *m_pf;
}
};
But - while the * operator makes sense, the -> makes none at all. Why would you want a -> operator to return a basic type? (ie not a pointer to a class)
In fact, I belive if you compile the above you will get:
warning C4284: return type for 'A::operator ->' is 'int' (ie; not a UDT or reference to a UDT. Will produce errors if applied using infix notation)
return type for 'identifier::operator –>' is not a UDT or reference to a UDT. Will produce errors if applied using infix notation
The operator–>( ) function must return either a pointer to a class or an object of or a reference to a class for which operator–>( ) is defined.
The following example causes this warning:
class C
{
public:
int operator->(); // warning
};
It is meaningless to apply the member access operator to fundamental data types that have no member access. This warning message will appear when this happens.
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It seems if I try to delete a record programmically using ADO with special characters (i.e Â) I will always get an unhandled exception error. But if I delete all records with special characters in them then run the delete program again, it works fine. Does this sound like a bug in ADO or did I forget something extra for special characters?
thanks!
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How did you access your DBMS? Through ODBC using ADO?
Is the working program using the same database access engine? (like ODBC driver or BDE or others)
Sometimes some drivers do not support certain SQL syntaxes or characters. (mostly to maintain compatibility across platforms like ODBC)
Sonork 100.41263:Anthony_Yio
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Thanks! However I noticed something strange in the DB and believe the problem occurred because for some reason unknown, duplicate records were inserted especially where a primary key has been defined and I think it bombed on not knowing what to delete or just that the rules of a primary key field were broken with the duplicate records. [ ]
oh well...
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Hi...
PLZ.. let me know any hint to manage size of CFormView dynamically...
Thanks...Have a Nice Life
---Sumit Kapoor---
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Describe what the main windows.
Kuphryn
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Hi all,
I created a template to convert any type, with defined "<<" to string.
But it hanges under .NET after some hunderd executions.
Can anybody see a problem in it?
Thanks in advance,
Boni
#include <sstream>
template<class T> string tostring(T i)
{
stringstream _tmp;
_tmp<<dec<<i;
return _tmp.str();
}
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dec means decimal, see stl ref
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I posted this yesterday but it sank under the various other requests ...so reposted this again :
hi !
I was testing out skinmagic demo for one of my apps,and came accross a few problems ..maybe experienced users can help me out on this.
problem 1 :
when i used irregular shaped dialog windows, the edges showed up as having a faint magenta lines ( i used magenta as my transparent color ).I made the image using photoshop 24 bit bmp,without any drop shadow.Can anyone tell me how to get rid of these edges?in the examples i saw dialog boxes with more complicated edges than mine but those didn't have a problem, and i am unable to find out the reason for this.Can anyone exolain why this happens ?
problem 2: i had a pulldown menu in my app, and when i skin it , the pulldown menu dissapears ! the popup menu (right click ) stays though...i mean it;s properly invoked on right click, but not the pulldown menu.
problem 3: As i said before i am using an irregular shaped dialog box in my main window.after skinning , the messageboxes are also assuming the same shape, which i do not one.i want my mnessageboxes to be plainer.Would specifying a control ID for the framedialog or the shapedialog help ?How can use a diff shape for my messagebox than my other dialog boxes?
I would be glad if anyone can solve my doubts.Thanks to all the contributirs in advance
Regards
Kane
"Some guys hack just to get themselves a girlfriend.What a pathetic reason, huh ?"
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I'm afraid I've never heard of Skinmagic but why don't you contact its developers and surely they can help with these basic issues.
Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com
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Hi..Checkout this...
Problem 1:-----------------------
Solution 1: Please position mask at right positon. your image & mask are not overlap exactly.that's not matter which tool you used to create background..as I always use painbrush.
Problem2:--------
Solution 2: this is your coding problem..please check again.
Problem 3:-----------
Solution 3: You sud use your own bug tracking system.. How? Make a Dialog and place static text on that. check error & show & use that dialog. One other way you can customize this by storing bitmap(and mask) setting in file or database. & while starting application check that file or database & use bitmap and mask according to that..
OK! Bye...
Sumit Kapoor
---Sumit Kapoor---
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Hi all,
I would like to write a program that allows me to password protect applications such as Word and I.E. My, vision is that when one of these apps is launched my app would open first and ask for the password and then either continue or kill the app. Would you have any ideas to point me in the right direction?
Thanks in advance for your help,
bacon
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i did soemthing like this using API hooks.study Ivo Ivanov's API hooking revealed for more info.
Hope it helps 
Regards
Kane
"Some guys hack just to get themselves a girlfriend.What a pathetic reason, huh ?"
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what i would do, is look for windows with those classname and titles of the windows you wish to protect, (you can use Spy++ to get them)
then hide them using the Showwindow() function
and bring up your password dialog
if they enter the right password show the window/s again using ShowWindow()
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Anonymous wrote:
...when one of these apps is launched my app would open first...
You might see about modifying the HKEY_CLASSES_ROOT\exefile\shell\open\command registry key. Change the (Default) value to myprog.exe "%1" %* and see if that works.
"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen
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A big thank you to everyone!
--bacon
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Dear Friend,
My application works fine in Release mode but it gives an error or displays an abort dialog when I close window in Debug mode.
Please write to me the reason behind this.
Thanking you in advance....
Billar
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maybe it;s giving an assertion error.then is shud give a message like "assertion failed in file so and so in line so and so " .Open up the file and read up that line.Maybe you have done something illegal....
Regards
kane
"Some guys hack just to get themselves a girlfriend.What a pathetic reason, huh? "
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Billar wrote:
Please write to me the reason behind this.
*laughter*
Probably because you have a bug. Without a description of any kind, however, it's quite difficult to know what the problem might be...
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Johan Rosengren wrote:
*laughter*
Probably because you have a bug. Without a description of any kind, however, it's quite difficult to know what the problem might be...
![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
It seems to be a worrying trend that some folks think that just because a program doesn't crash it "works fine". He should consider himself lucky the problem shows itself in a debug build and not just the other way around.;)
Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com
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See if this article helps.
"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen
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DEar Friends,
I got the solution. Actually the problem was in the attached lib file. After linking the another or seperate .lib file seperately in Release/Debug mode, problem get solved.
Anyway thanks for your kind co-operation.
Bye
Billar
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dears:
In the following function both Visual C++ 6 and (Insure++ software that detecting memory leaks and bugs) pointing that there are a memory leak in this statement in this function
Since
*CWorkAreaWnd derived from CWnd.
*CDrawObject Derived from CObject and it is the base class for all objects(Shapes here).
* and CDrawObject has m_ObjTracker member function of Type CRectTracker.
code:--------------------------------------------------------------------------------
void CWorkAreaWnd:rawTracker(CDrawObject *pDrawObject , POINT point )
{
/*
** Create Tracker for the selected object.
*/
CPoint n = point ;
CDrawEditor32App * pApp = (CDrawEditor32App*)AfxGetApp();
CDrawEditor32Doc *pDoc = pView->GetDocument();
CRect rect ,objectRect = pDrawObject->getObjectRect();
if (pDrawObject->m_ObjTracker)
{
pDrawObject->m_ObjTracker = NULL;
delete pDrawObject->m_ObjTracker;
}
//////////////////////////////////////////////////////////////////////////////////
pDrawObject->m_ObjTracker = (CTrackerObj *)new CTrackerObj(objectRect,CRectTracker::dottedLine |CRectTracker::resizeInside |CRectTracker::resizeOutside );
//Here compiler and Insure indicate memory leak
/////////////////////////////////////////////////////////////////////////////////
if ((pDrawObject->m_ObjTracker))
{
if(!bArrowKey && !pDoc->pDrawClass->bMultiSelection)
pDrawObject->m_ObjTracker->Track(this, point, TRUE );
else
pDoc->m_Change = TRUE;
pDrawObject->m_ObjTracker->m_rect.NormalizeRect();
CRect TakerRect = pDrawObject->m_ObjTracker->m_rect;
if(!objectRect.EqualRect(TakerRect))
{
rect = pDrawObject->CalculateDimensionRect(TakerRect);
pDrawObject->setObjectRect(rect);
}
}
}
--------------------------------------------------------------------------------
but the problem if i add this at the end of the Fucntion
-------------------------------------------------------
code:
delete pDrawObject->m_ObjTracker;
-------------------------------------------------------------
the program will crash when draw something in screen .
where is the right place to perform free memory in this case?
and why crashing occured since i free memory before the scope of the fucntion end up.
Thanks
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You might get the crash if you don't set pDrawObject->m_ObjTracker to NULL at the end. You will most probably have forgotten to add a delete in the destructor as well
You can, however, make the DrawObject class manage its own memory. Add a function CreateTracker instead of allocating memory in the calling function. In CreateTracker, delete the old tracker if it exists and create a new one with new. Make sure to delete the tracker in the DrawObject destructor.
You are making a maintenance nightmare for yourself by allocating part of a class outside the class, naughty, naughty, naughty *slap on wrist*
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