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Dean Seo wrote: By the way, in that case, the thing is that that code doesn't even comfile and it occurs an 'casting failed' error.
I overlooked it to assume that you did a double casting to take the const away. That is a common thing (a terrible thing, actually) that people do:
CString _str = TEXT("ABCD");
TCHAR* _tstr = (LPTSTR)(LPCTSTR)_str;
Dean Seo wrote: wchar_t* _WideCharacter = (wchar_t*)(const wchar_t*)aaa // works!
You shouldn't say "works!". You should instead say "it compiles!". Yeah, it will compile. But it's a terrible thing to do. How about this instead?
A aaa;
const wchar_t* p = aaa;
There are several APIs (and functions that we may code) that will need a read-only string. For example, you may write a function that takes the path of a file and encrypts it. So, you'll just be accepting the string which will be the path, and you'll not be modifying the string itself. In cases like that (and in MOST cases), you will only need a read-only string. That's why CString gives you a LPCTSTR (const wchar_t*), which will be pointing to the internal buffer where CString is storing the string.
But there are those edge cases where might want to have direct write access to the internal buffer of CString. For such cases, CString provides the GetBuffer() method (which I already explained).
Conclusively, there is no excuse for abusing the LPCTSTR operator (using it to cast the const away and assigning it to a non-const variable is bad).
"Real men drive manual transmission" - Rajesh.
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Dean, let me know if you need any further explanation.
"Real men drive manual transmission" - Rajesh.
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I am sorry for this late response.
Thank you for helping me. You are the best!
Thank you again.
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You're welcome.
Dean Seo wrote: You are the best!
Now, you're overselling me. 
"Real men drive manual transmission" - Rajesh.
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Hi,
In samp.h I have a struct definied as
struct X_PStruct;
typedef struct X_PStruct *X_P;
struct X_PStruct{
...
}
In samp.c
#include"samp.h"
void func1()
{
X_P p = Create (NULL);
....
}
In func1 whereever I try to use p, it creates an error "C2065: p undeclared identifier"
What am I doing wrong?
Thanks.
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Member 8117171 wrote:
In func1 whereever I try to use p, it creates an error "C2065: p
undeclared identifier"
What am I doing wrong?
I tried to replicate this but could not. It always compiles fine.
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Some people are making such thorough preparation for rainy days that they aren't enjoying today's sunshine." - William Feather
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I use the VS2010. Although I created the project as Win32 Console, and for each .c file I have the properties set to compile as c code. Is there some setting that I am missing?
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I used VS6. I'm not sure if the VS2010 compiler, given that it's stricter, would be a factor.
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Some people are making such thorough preparation for rainy days that they aren't enjoying today's sunshine." - William Feather
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No, there's nothing in that C code that is non-standard. If I had to guess, he's just missing something silly like a semicolon/closing bracket or something like that.
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I tried with VS2008 and it worked.
Watched code never compiles.
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did you forget to add a ";" at the end of the struct ?
struct X_PStruct;
typedef struct X_PStruct *X_P;
struct X_PStruct{
...
};
Watched code never compiles.
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Did you remember to end your struct definition with a ';'? Also, there's a shorthand method to declaring structs like that:
typedef struct _X_PStruct{
...
} X_PStruct, *X_P;
X_PStruct MyStruct;
X_P pMyStruct;
One last thing, there's nothing called Create() that you can call like that (at least that I remember  ).
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Sorry, that was typo that I left ";" when I was typing this question. Create() is a function that I created that has a return type struct X_Pstruct
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Oh ok, that makes more sense...
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Post the line of code where the error occurs.
Post the entire func1 if possible.
Are there any other errors or warning before the line that you mention?
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Hello All
I know signed on user name and i provide the user an edit box to enter the corresponding password.
Now is there a way to validate it?
Regards
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Take a look at the LogonUser()[^] API.
"Real men drive manual transmission" - Rajesh.
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Hi
i am using this control in my Application, There i don't have enough horizontal space show entire link. i wanted show that link in multiline.
Is it possible?
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I've not used this control and so I'm not sure if there is a separate URL and Text property.
If there is you could put a \n or \r\n within the Text to split it in 2 lines.
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Hello every one
I am working in mfc application in which I want save file name in unocode format. That means if I save file other that english then application gets crashed.. plz help me
here is my code... throgh which applicayin cant crashed but file name shows garbage value
CT2W pszConvertedString(_strPath,CP_UTF8);
CW2A pszConvertedAnsiString(pszConvertedString,CP_UTF8);
std::string strFileName(pszConvertedAnsiString.m_psz);
std::fstream outputFileStream;
outputFileStream.open( strFileName.c_str(), std::ios_base::out|std::ios_base::binary );
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Did you look at the call stack? Where exactly does the crash happen?
"Real men drive manual transmission" - Rajesh.
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it goes ???? instead of string..
Crash could be solve by given code but proper name cant be showin... it shows garbage value
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Start watching the string under your debugger, and find out at which step the value garbles. That might give you a lead.
"Real men drive manual transmission" - Rajesh.
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Try using the std::wstring and std::wfstream classes.
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