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Re: errors adding to windows form creator

Member 79972643-Apr-12 15:10

Member 7997264

3-Apr-12 15:10

It got rid of most of the errors I was looking at but now I have some more.

1>------ Build started: Project: TestForms, Configuration: Debug Win32 ------
1>  TestForms.cpp
1>c:\users\steve\documents\visual studio 2010\projects\testforms\testforms\Form1.h(149): error C2664: 'strcmp' : cannot convert parameter 2 from 'WCHAR [260]' to 'const char *'
1>          Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
1>c:\users\steve\documents\visual studio 2010\projects\testforms\testforms\Form1.h(149): error C2664: 'strcmp' : cannot convert parameter 2 from 'WCHAR [260]' to 'const char *'
1>          Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
1>c:\users\steve\documents\visual studio 2010\projects\testforms\testforms\Form1.h(152): error C2679: binary '+=' : no operator found which takes a right-hand operand of type 'WCHAR [260]' (or there is no acceptable conversion)
1>          C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xstring(777): could be 'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::operator +=(const std::basic_string<_Elem,_Traits,_Ax> &)'
1>          with
1>          [
1>              _Elem=char,
1>              _Traits=std::char_traits<char>,
1>              _Ax=std::allocator<char>
1>          ]
1>          C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xstring(782): or       'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::operator +=(const _Elem *)'
1>          with
1>          [
1>              _Elem=char,
1>              _Traits=std::char_traits<char>,
1>              _Ax=std::allocator<char>
1>          ]
1>          C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xstring(787): or       'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::operator +=(_Elem)'
1>          with
1>          [
1>              _Elem=char,
1>              _Traits=std::char_traits<char>,
1>              _Ax=std::allocator<char>
1>          ]
1>          while trying to match the argument list '(std::string, WCHAR [260])'
1>c:\users\steve\documents\visual studio 2010\projects\testforms\testforms\Form1.h(160): error C2679: binary '+=' : no operator found which takes a right-hand operand of type 'WCHAR [260]' (or there is no acceptable conversion)
1>          C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xstring(777): could be 'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::operator +=(const std::basic_string<_Elem,_Traits,_Ax> &)'
1>          with
1>          [
1>              _Elem=char,
1>              _Traits=std::char_traits<char>,
1>              _Ax=std::allocator<char>
1>          ]
1>          C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xstring(782): or       'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::operator +=(const _Elem *)'
1>          with
1>          [
1>              _Elem=char,
1>              _Traits=std::char_traits<char>,
1>              _Ax=std::allocator<char>
1>          ]
1>          C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xstring(787): or       'std::basic_string<_Elem,_Traits,_Ax> &std::basic_string<_Elem,_Traits,_Ax>::operator +=(_Elem)'
1>          with
1>          [
1>              _Elem=char,
1>              _Traits=std::char_traits<char>,
1>              _Ax=std::allocator<char>
1>          ]
1>          while trying to match the argument list '(std::string, WCHAR [260])'
1>c:\users\steve\documents\visual studio 2010\projects\testforms\testforms\Form1.h(161): error C2065: 'cout' : undeclared identifier
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Any idea how to fix this?

Re: errors adding to windows form creator

Richard Andrew x643-Apr-12 15:16

Richard Andrew x64

3-Apr-12 15:16

Your project properties are probably set to use Unicode instead of ANSI for all your strings.

Either change the project properties to use ANSI, or use the Unicode version of the strcmp function.

The difficult we do right away...
...the impossible takes slightly longer.

Re: errors adding to windows form creator

Member 79972643-Apr-12 17:25

Member 7997264

3-Apr-12 17:25

Thank you very much you solved all my problems. I can't thank you enough.

Re: errors adding to windows form creator

Wes Aday3-Apr-12 15:23

Wes Aday

3-Apr-12 15:23

Also check to make sure that your project is set to use native C++ code in your CLI project. Not sure if that will help or not.

Why is common sense not common?
Never argue with an idiot. They will drag you down to their level where they are an expert.
Sometimes it takes a lot of work to be lazy
Please stand in front of my pistol, smile and wait for the flash - JSOP 2012

modified 3-Apr-12 21:57pm.

Re: errors adding to windows form creator

Member 79972643-Apr-12 17:50

Member 7997264

3-Apr-12 17:50

I do not fully understand what you mean. Is that an option in Visual Studio? I also came up with another question. How can I convert my System::String^ (in button2_click()) to std::string (in GetAllFiles(string))?

Re: errors adding to windows form creator

Wes Aday4-Apr-12 1:48

Wes Aday

4-Apr-12 1:48

Member 7997264 wrote:
I do not fully understand what you mean

You are trying to use native C++ code in your managed C++ project. See this article[^]

Member 7997264 wrote:
System::String^ (in button2_click()) to std::string

See this article[^]

You might get a better response if you asked your questions in the managed c++ forum, here[^]. This forum is for unmanaged C++.

delete pointer

ITISAG3-Apr-12 11:03

ITISAG

3-Apr-12 11:03

Why does the follwing throw an error @ delete []pBuffer;

char *pBuffer = new char[1024];
CString csBuf = (CString)pMember->m_member_label;
pBuffer = csBuf.GetBuffer(sizeof(pBuffer));

xtext=(GLfloat)(((pMember->m_xs)+(pMember->m_xe))/2.0);
ytext=(GLfloat)(((pMember->m_ys)+(pMember->m_ye))/2.0);
ztext=(GLfloat)(((pMember->m_zs)+(pMember->m_ze))/2.0);

m_bmf->DrawStringAt((GLfloat)(xtext), (GLfloat)(ytext+5), (GLfloat)(ztext), pBuffer);
delete []pBuffer;

Re: delete pointer

Chuck O'Toole3-Apr-12 11:19

Chuck O'Toole

3-Apr-12 11:19

ARRRRGH. You overwrite pBuffer with the result of CString's GetBuffer(), which gives you a pointer to a buffer you don't own. Then you try to delete it. BOOM.

You cannot delete the pointer returned by GetBuffer(), that memory belongs to the CString Object and it will delete it when the object is deleted or goes out of scope.

Plus, you've lost the pointer to the char[1024] that you did allocate with new, leaving a memory leak for that memory.

Re: delete pointer

ITISAG3-Apr-12 11:21

ITISAG

3-Apr-12 11:21

Thanks.
So, I'm an idiot. What do I do?

I did this, and it at least ran:
pBuffer=NULL;
delete []pBuffer;

Re: delete pointer

Chuck O'Toole3-Apr-12 11:31

Chuck O'Toole

3-Apr-12 11:31

Setting pBuffer = NULL and then deleting it is a big NOP, a no-operation. You might as well just deleted the "delete" statement.

Instead, if your sole purpose in doing the "GetBuffer" is to pass a string to DrawStringAt(), then you don't need to "new" or "delete" anything in that program. All you need is:

CString csBuf = (CString)pMember->m_member_label;
char *pBuffer = csBuf.GetBuffer(1);
 
xtext=(GLfloat)(((pMember->m_xs)+(pMember->m_xe))/2.0);
ytext=(GLfloat)(((pMember->m_ys)+(pMember->m_ye))/2.0);
ztext=(GLfloat)(((pMember->m_zs)+(pMember->m_ze))/2.0);
 
m_bmf->DrawStringAt((GLfloat)(xtext), (GLfloat)(ytext+5), (GLfloat)(ztext), pBuffer);

Or better yet, avoid the GetBuffer() entirely and pass "csBuf" to DrawStringAt() and let the compiler convert from CString to char * as needed.

Re: delete pointer

ITISAG3-Apr-12 11:26

ITISAG

3-Apr-12 11:26

This did it: (you approve?)
CString csBuf = (CString)pMember->m_member_label;
char *pBuffer = csBuf.GetBuffer(sizeof(pBuffer));

xtext=(GLfloat)(((pMember->m_xs)+(pMember->m_xe))/2.0);
ytext=(GLfloat)(((pMember->m_ys)+(pMember->m_ye))/2.0);
ztext=(GLfloat)(((pMember->m_zs)+(pMember->m_ze))/2.0);

m_bmf->DrawStringAt((GLfloat)(xtext), (GLfloat)(ytext+5), (GLfloat)(ztext), pBuffer);
pBuffer=NULL;
delete []pBuffer;

Re: delete pointer

Chuck O'Toole3-Apr-12 11:34

Chuck O'Toole

3-Apr-12 11:34

Nope, see my response to the earlier post

Re: delete pointer

Richard MacCutchan3-Apr-12 22:00

Richard MacCutchan

3-Apr-12 22:00

You really need to study this[^] carefully. You also need to learn about the sizeof[^], new[^] and delete[^] operators.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: delete pointer

ggggfjeicfh5-Apr-12 16:26

ggggfjeicfh

5-Apr-12 16:26

why pBuffer=NULL;
and then delete []pBuffer;

delete what? Only a invalid pointer

Re: delete pointer

ggggfjeicfh5-Apr-12 16:40

ggggfjeicfh

5-Apr-12 16:40

What in m_member_label is a CString pointer or not?

Or you should not do any thing, CString class local instance will destroy at the end of the fun automatically except a pointer from other place?

mousePress crash 64 bit mfc application

appollosputnik3-Apr-12 8:11

appollosputnik

3-Apr-12 8:11

My application is working fine on 32 bit, I am trying to run in 64 bit mfc application, GUI is launching, the model is also loaded but the moment I press left right or middle mouse it crashes. what all i need to change to run successfully in 64 bit machine.
The error I found in OnMouseActive() function, do i need to implement this function ? Pls help me. Thanks a lot in advance

Socket Alive

john56323-Apr-12 2:20

john5632

3-Apr-12 2:20

Hi,

Is there any machenism to check the socket status (alive or dead )?

Re: Socket Alive

Code-o-mat3-Apr-12 4:51

Code-o-mat

3-Apr-12 4:51

What do you mean by "alive" and "dead"?

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> If it doesn't matter, it's antimatter.<

Re: Socket Alive

Richard Andrew x643-Apr-12 5:14

Richard Andrew x64

3-Apr-12 5:14

If there is any doubt about the condition of a socket, it's best to simply Close() it and open a new one.

The difficult we do right away...
...the impossible takes slightly longer.

Re: Socket Alive

jschell3-Apr-12 8:41

jschell

3-Apr-12 8:41

john5632 wrote:
Is there any machenism to check the socket status (alive or dead )?

Send a request and get a response.

IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS returns error code 87 INVALID_PARAMETER

VCProgrammer2-Apr-12 21:47

VCProgrammer

2-Apr-12 21:47

Hi all,

I am trying to map logical drive to physical drive i.e. when i pass D: then it should get that which Physical drive does D: belongs to.

I am using IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS for achieving my goal. My problem is it is returning error code 87 INVALID_PARAMETER.

I am not getting that what i am doing wrong

here is my code

CString str = _T("\\\\.\\\\D:");
HANDLE h = CreateFile(str, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_EXISTING,0,NULL);
if(INVALID_HANDLE_VALUE != h)
{
	VOLUME_DISK_EXTENTS sd;
	DWORD dwRet;
	ret = DeviceIoControl(h, IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS, NULL, 0, &sd, sizeof(VOLUME_DISK_EXTENTS), &dwRet, NULL);
if(ret != 0)
{
	AfxMessageBox(_T("Success"));
}
else
{
	DWORD d;
	d = GetLastError();
}
}

Re: IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS returns error code 87 INVALID_PARAMETER

Jochen Arndt2-Apr-12 23:36

Jochen Arndt

2-Apr-12 23:36

Use this (single backslash in front of device name / drive letter)

C++

CString str = _T("\\\\.\\D:");

Re: IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS returns error code 87 INVALID_PARAMETER

Richard MacCutchan2-Apr-12 23:44

Richard MacCutchan

2-Apr-12 23:44

Your pathname is incorrect, it contains two backslash characters after the dot rather than one, as described here[^]. You should check the return value from your CreateFile() call before proceeding.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS returns error code 87 INVALID_PARAMETER

VCProgrammer3-Apr-12 0:00

VCProgrammer

3-Apr-12 0:00

after passing one also it is giving same error

_T("\\\\.\\D:")

CreateFile is returning correct handle but DeviceIoControl is returning 0.

Re: IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS returns error code 87 INVALID_PARAMETER

Richard MacCutchan3-Apr-12 0:19

Richard MacCutchan

3-Apr-12 0:19

Did you check that CreateFile() was successful?

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

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