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Hi!
In some class, the adress of "this" change from method to other method of the same class.
For example,
void X::doNothing()
{
doNothing2(); // adress of "this" = 0x053014e4
}
void X::doNothing2()
{
// adress of "this" = 0x053014f0
}
This happen only in some class of my project.
The "this" adress is essential for me because I use it to do object research by comparing adress.
Do someone have an idea why in some class this will happen and other not?
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Multiple base clases with virtual methods?
Poor pointer casting? (don't use (X *), use static_cast <x *=""> ())
Tim Smith
I'm going to patent thought. I have yet to see any prior art.
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Hi!
I don`t use poor pointer casting. In fact, I often use dynamic_cast on object having multiple base class (and the basic base class is inherited virtually).
Can it cause a problem?
I`m stocking "this" adress in a vector to do futur search base on adress difference.
Thanks
Chris
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Perhaps an implicit copy is being made somewhere? You can try explicitly specifying the copy constructor and setting a breakpoint inside it.
- Mike
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Hi all,
I am deriving a class from CWnd, I just want to display images from a CListImage. What I really need is to display images like Emoticon Window in messenger like applications.
I saw an article in C# which creates an emoticon window, I tried myself but were unable to do in VC++/MFC
Please anybody help me to create a window like the one I need.
Thanks.
The Phantom
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PLEASE DISREGARD THIS POST - I WAS ONLY JOKING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Hmm
Whois Server Version 1.3
Domain names in the .com and .net domains can now be registered
with many different competing registrars. Go to http:
for detailed information.
No match for "PROGRAMMINGHOMEWORK.COM".
It might just work. A mate of mine from university set up www.cheathouse.com[^]. Makes a packet out of it too.
Ryan
"Everybody has a right to be stupid, but
some people abuse the privilege."
Uncle Joe Stalin
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I was just kidding. Maybe someone would be willing to put something together to make some $$$.
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Ok, I'll take you up on it. I've *very* new at this and assume the question is trivial, but can't seem to figure out how to get the documentation to tell me what I want to know.
I need to read a string and, if it's a number, convert it to double. How do I tell whether the string (input via the Console::ReadLine() method) contains only numeric characters (and can therefor be correctly converted to double via the Convert::ToDouble() method) or not?
If this turns out not to be trivial, just let me know and I'll think of something else. Maybe get a stream of chars or something (yuck!)
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Your question sounds like a sincere request for advice - and I would gladly answer it if I could - but I am only familiar with MFC and C++ - I think your question is either .NET, JAVA or C# (I have no idea).
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Terry O`Nolley wrote:
but I am only familiar with MFC and C++ - I think your question is either .NET, JAVA or C# (I have no idea).
No...it's C++ with managed extensions 
When I can talk about 64 bit processors and attract girls with my computer not my car, I'll come out of the closet. Until that time...I'm like "What's the ENTER key?"
-Hockey on being a geek
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Even though this isn't C/C++ like Terry said, you can still use this same method that I'd use.
Write a function that checks each character to see if it is a number or not. Return true if its a number and false if not. If it reaches the end of the string without returning false, then it converts it double, else it fails.
Two ways I can think of to do this. One is just check the char is equal to any number 0-9 (this probably isn't the most effective way) or convert to ascii and check if it is within the ascii range for a number.
Mike
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You could look at the System::Text::RegularExpressions namespace and create a regular expression that would match the characters 0-9...then check to see if the thing is a match. You could also use the Microsoft::VisualBasic namespace  and the IsNumeric() function.
Also, I think the Convert::ToDouble() throws an exception if the input string is not in a proper format. (Actually I know so, I just did this the other day in C#). You could wrap the call to ToDouble() in a try catch block and handle the error whichever way you want.
Hope that helps...
When I can talk about 64 bit processors and attract girls with my computer not my car, I'll come out of the closet. Until that time...I'm like "What's the ENTER key?"
-Hockey on being a geek
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If you wish to buy some advertising then please contact marketing@codeproject.com. Advertising in this way is, unfortunately, unacceptable.
cheers,
Chris Maunder
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Code-Project would accept sponsors whose product was selling homework completion for students?!?!?!?!?
I guess so, or you wouldn't have referred my joke to your ad dept - or was that in itself a joke??!??!
I am so confused!
Anyways, I was just joking.
Have a cheerful day!
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What fun!!! 
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Is there a way to detect if a UNC path is actually a folder on the local machine that is being shared?
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The function WNetGetUniversalName may be of help.
--
Joel Lucsy
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Hello,
I have this code
COleVariant vtOpenMethod((short)1);
LPDISPATCH pDisp;
pDisp = CRApplication.OpenReport((_bstr_t)"Grafic de ocupare pe zile.rpt", vtOpenMethod);
CRReport.AttachDispatch(pDisp);
ICRParameterFieldDefinitions apParam= CRReport.GetParameterFields();
long lCount = apParam.GetCount();
for(int i = 1; i <= lCount; i++)
{
COleVariant vtIndex ((long)i, VT_I4);
COleVariant vtReport("");
_variant_t vCurVal;
vCurVal = COleVariant(_T(m_data));
ICRParameterFieldDefinition yy = apParam.GetItem(vtIndex,vtReport);
....
}
What I want to do is to pass to my report 2-3 parameters.
If i use
yy.SetCurrentValue(vCurVal);
I get this error :
Unable to write read-only property.
Please can somebody tell me how to pass these parameters?
Thanks!
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I was working on an Dialog app and have done a lot of work on it including UI , etc.
Now the requirement is that I need multiple pages like in a tabbed control .
I read documentation on MSDN that requires me to have a CPropertySheet object in my dialog class and then add CPropertyPage objects to it .
I have done alot of work and need a effiecient way to
Change the existing Dialog to be one of the PropertyPages
I have some basic questions :
1. Do i have to create a new app to do this and import the Dialog Resource , Create a new class from ClassWizard deriving from CpropertyPage and then manually copy / paste chunks of code for handlers and other functions from the old Dialog app ?
2. Is there a better and efficient way of doing this ?
CodeProject Gurus please help !
Engineering is the effort !
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Just checked out some code used for property sheets. Doesn't really look that complicated to just change your dialog classes to be derived from CPropertyPage. I could be wrong though. It'd be nice if was that easy to change.
Can't think of any other way to do it.
Mike
p.s. I am def not a guru, so anyone who knows anything better, let us know
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Hello,
How can I load a file .RC in a VC project with a different name ?? I need to load another RC file (in execution time) to load all the strings of another language.
Any idea ??
Thanks,
Cris.
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Unless you have a reason not to, you can put all of the resources in the same .RC file. Just use the LANGUAGE statment in the .RC file.
Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?
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Ok, in this case I will have 2 String Tables (2 languages), right ??
And how can choose one String Table to load ??
[]'s
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