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http://www.informit.com/library/content.aspx?b=Visual_C_PlusPlus&seqNum=149
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Hi to all,
I have this doubt,please clear me....
I saw a statement in one program
#define ___allocCon(x,y) new x y;
could anyone please tell me what does this means....I am confused with 2 parameters with new (x and y)...I have never seen this...
Please help me out.
Thanks in advance
HimangshuS
-----------------------------
I am a beginner
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try to see where ___allocCon is used in that program.
you may get some clue.
--------------------------------------------
Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
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they have used like this
ACE_Message_Block * pMsg = ___allocCon(ACE_Message_Block,(sizeof(void*),xxx ));
ACE_Message_Block is a message block data types for ace framework....and xxx is define as
#define yyy 8000
#define xxx (yyy +1)
please give some light on it
-----------------------------
I am a beginner
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himangshuS wrote: ACE_Message_Block * pMsg = ___allocCon(ACE_Message_Block,(sizeof(void*),xxx ));
before compilation, the above would be expanded as
ACE_Message_Block * pMsg = new ACE_Message_Block sizeof (void*) 8001.
but still i have some confusion on the ',' used after size of.
hope somebody may answer it in better.
--------------------------------------------
Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
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There is a placement new operator which takes 2 parameters.
But it's called differently.
It is declared as void* operator new(size_t size, void* ptr);
It is called as new(ptr) ClassName;
«_Superman_»
I love work. It gives me something to do between weekends.
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you can do the following,
1. Add the class in to your solution explorer
2. Put the .h file in the program folder.
3. #include "SpreadSheet.h" where you want to call it
4. Create an instance of the class where you want to access it something like
CSpreadSheet SpreadSheet;
Use the instance to call the functions from the class.
Hope it helps 
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thanks for reply.
When i use these step
1. Add the class in to your solution explorer
2. Put the .h file in the program folder.
3. #include "SpreadSheet.h" where you want to call it
then i am getting error
fatal error C1083: Cannot open include file: 'SpreadSheet.h': No such file or directory
so where i did wrong.
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Use
#include "CSpreadSheet.h"
It should work.
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thanks error solved.
modified on Tuesday, July 7, 2009 2:35 AM
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Pick a book on C++ and start reading.
It is a crappy thing, but it's life -^ Carlo Pallini
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i have developed SDI application and now i want to load a file from file menu of SDI application. where i have to write the code for file open menu.
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when you develop an SDI Application, you get a default menu. In the File menu there is an option to open the file.
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thanks but if i want to modify default menu according to my needs then where can i do it.
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Document class 
Inside the OnOpenDocument().
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i m using vs 2005 and there is no onopendocument() i think.
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// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CPEWatcherDoc)
public:
virtual BOOL OnOpenDocument(LPCTSTR lpszPathName);
//}}AFX_VIRTUAL
Do u tried to add the code?
I never used vs2005, so i can only guess, they didnt removed it.
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how to create common memory and acheive synchronization for two applications running parallally
kir_MFC
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create a shared memory and with a semaphore or mutex so as to aviod dead lock.
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http://msdn.microsoft.com/en-us/library/aa366551(VS.85).aspx
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HI, i am having problem with converting my c++ class to dll. The problem is the following.
i have a class that i want to export, there are two private variables in the class, one of them is
a struct. the variables are initialized in the constructor. In my ap, i created a object of my class and then delete it. Looks pretty straight forward, however, when deleting the object i get a error message "Debug Error". If i don't initialize the variables, delete is ok. if i memset the struct variable,i get a "scaler deleting destructor" error. Anyone got any idea why the dll behaves like this?
----------------------------------------AP------------------------------------
CIPCamDll *a = new CIPCamDll();
delete a;
---------------------------------------.h--------------------------------------
#ifdef IPCAMDLL_EXPORTS
#define IPCAMDLL_API __declspec(dllexport)
#else
#define IPCAMDLL_API __declspec(dllimport)
#endif
typedef struct s
{
int abcd;
}s;
class IPCAMDLL_API CIPCamDll {
public:
CIPCamDll(void);
CIPCamDll(char* para_address);
~CIPCamDll(void);
private:
int session_id;
s m_t;
};
--------------------------------------------------------------------------------
--------------------------.cpp---------------------------------------------------
CIPCamDll::CIPCamDll()
{
session_id = 13;
return;
}
CIPCamDll::CIPCamDll(char* para_address)
{
return;
}
CIPCamDll::~CIPCamDll()
{
return;
}
------------------------------------------------.cpp-------------------------------
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Where is the memset?
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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HI, thanks for the reply, i put the memset in the constructor.
i am guessing that it has something do to with different heap memory allocated for
dll, and AP?
--------------------------.cpp---------------------------------------------------
CIPCamDll::CIPCamDll()
{
memset(&m_t,0,sizeof(s));
session_id = 13;
return;
}
------------------------.cpp------------------------------------------
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