C / C++ / MFC Discussion Boards

Re: cannot convert from char * to unsigned short *

Graham Bradshaw5-Apr-06 6:35

5-Apr-06 6:35

T2A converts to ANSI. In a Unicode build, LPTSTR will be a wide character, so setting a variable of type LPTSTR to the result of the T2A macro makes no sense. If you want pszRCPT to be ANSI (as implied by the code), declare it as LPSTR (note the missing 'T')

LPSTR - ANSI character string
LPWSTR - wide character string
LPTSTR - ANSI or wide character string depending on if _UNICODE is defined or not

Re: cannot convert from char * to unsigned short *

QuickDeveloper5-Apr-06 6:47

QuickDeveloper

5-Apr-06 6:47

Thank you very much..the problem is solved Smile | :)

"Every morning I go through Forbes list of 40 richest people in the world. If my name is not in there, I go to work..!!!"

Re: cannot convert from char * to unsigned short *

Michael Dunn5-Apr-06 6:36

Michael Dunn

5-Apr-06 6:36

T2A returns an ANSI string, but you're assigning to a LPTSTR (a Unicode string).
You also shouldn't be removing the const without a good reason, which I don't see in the snippet.
LPCSTR pszRCPT = T2CA(LPCTSTR(sBuf));

--Mike--
Visual C++ MVP Cool | :cool:

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Re: cannot convert from char * to unsigned short *

HalfWayMan5-Apr-06 6:45

HalfWayMan

5-Apr-06 6:45

Type checking ruins everyone's lives.

__asm
{
mov eax, [sBuf]
mov [pszRCPT], eax
}

Unsure | :~

Menu in MDI child window

HalfWayMan5-Apr-06 6:16

HalfWayMan

5-Apr-06 6:16

Why can't I put a menu on an MDI child?!?! Who did this!?! Life is no longer worth living!

Changing security of File

FarPointer5-Apr-06 6:04

FarPointer

5-Apr-06 6:04

Hi,
How to change the security permission of a folder and a file.

Regards,
FarPointer

Re: Changing security of File

David Crow5-Apr-06 7:00

David Crow

5-Apr-06 7:00

Search for Access Control Entry (ACE) and Access Control List (ACL).

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: Changing security of File

Hamid_RT5-Apr-06 19:35

Hamid_RT

5-Apr-06 19:35

Hi FarPointer,

maybe it is some helpful to you

http://www.codeproject.com/win32/accessctrl4.asp[^]

Re: Changing security of File

J51219825-Apr-06 19:45

J5121982

5-Apr-06 19:45

which os r u using?
r u the Administrator of ur system?

if so. u can set the permission.

start>>control panel>>administrator tools>>local security policy>>windows setting>> local policy>>security option>>network acess sharing and security model for local sysem >>select classic - local....

now right+click the folder for which u need permission>> security tab>>

i belive rest of the thing u could do...

JAYARAJ

Detecting a "Missing Character Glyph" without looking at a window

jayart5-Apr-06 5:59

jayart

5-Apr-06 5:59

I am developing a dialog similar to Windows Word - Insert - Symbol Table Dialog.
For this all the charaters have to be displayed for the selected font (from all the existing fonts) and subsets which support the current font.
I am able to display the characters but some are appearing blank. These are the characters which are not supported by the the current font.
Can anyone tell me how to detect missing glyphs?
Thanks a ton,
Arti Gujare

Arti Gujare

how to change bitmap at mouse events

baldha rakesh5-Apr-06 5:08

baldha rakesh

5-Apr-06 5:08

i am working with dialog base application and there is several buttons on the dialog and setted bitmaps on these button but now i want to change image image on button when mouse over on this button and mousedown and mouseup and mouse down for some time all 4 events i want different image onthis button so for this

what i have to do for the same?

Bankey Khandelwal
Software Engineer

Re: how to change bitmap at mouse events

Hamid_RT5-Apr-06 5:36

Hamid_RT

5-Apr-06 5:36

Hi Bankey Khandelwal,
maybe it is some helpful to you
http://www.codeproject.com/buttonctrl/cbuttonst.asp[^]

WaitCommEvent

LCI5-Apr-06 4:58

LCI

5-Apr-06 4:58

Has anyone ever had any success using "WaitCommEvent"
My experience thusfar is that it never returns. I have used some examples that i found using Overlapped I/O but they don't seem to work either. If anyone has had any success using this, please respond. I am not sure what else to try. All i want to do is catch a signal on the DSR pin when it is sent.

What Happened to CString ?!?

Jethro635-Apr-06 4:56

Jethro63

5-Apr-06 4:56

Greetings:

I have recently started using Visual Studio V7.0 (previously used V6.0), but still using MCF. I have continued to use CString for various things text storage but today I tried to use the "Find" member function.

What happened? VS 7.0 doesn't even seem to document CString and its members anymore. When I tried to build my program, I get this error:

error C2664: 'int ATL::CStringT<basetype,stringtraits>::Find(ATL::CSimpleStringT<basetype,t_bmfcdll>::XCHAR,int) throw() const' : cannot convert parameter 1 from 'const TCHAR *[7]' to 'ATL::CSimpleStringT<basetype,t_bmfcdll>::XCHAR'
with
[
BaseType=char,
StringTraits=StrTraitMFC_DLL<char>,
t_bMFCDLL=true
]
and
[
BaseType=char,
t_bMFCDLL=true
]
This conversion requires a reinterpret_cast, a C-style cast or function-style cast

Huh?

Can someone tell me how I can just use my faithful CString and get back to work?

Thanks in advance,
Mark

-- modified at 11:00 Wednesday 5th April, 2006

Re: What Happened to CString ?!?

toxcct5-Apr-06 5:00

toxcct

5-Apr-06 5:00

your program certainly have a MFC support lack...

Re: What Happened to CString ?!?

Jethro635-Apr-06 5:12

Jethro63

5-Apr-06 5:12

Hi;

The program was initialized using the MFC App Wizard. It has a main window, menus, tool bars, status bars, etc, etc. All of them MFC classes. I have been using CString throughout until today when I tried to use "Find".
Mark

Re: What Happened to CString ?!?

toxcct5-Apr-06 5:14

toxcct

5-Apr-06 5:14

CString[^] is still documented.

but you might be missing to #include <afx.h>

Re: What Happened to CString ?!?

Jethro635-Apr-06 5:26

Jethro63

5-Apr-06 5:26

Nope, its there. Its embedded in "stdafx.h". Furthermore, when I type CString in the index, there are several items listed but there is nothing that pertains to the documentation that you would expect to see for a supported class: namely "Members" and "Overview". They keep referring to some new class called CStringT.

Re: What Happened to CString ?!?

David Crow5-Apr-06 5:26

David Crow

5-Apr-06 5:26

CStringT is now a shared class between MFC and ATL. You need to include cstringt.h.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: What Happened to CString ?!?

Jethro635-Apr-06 5:39

Jethro63

5-Apr-06 5:39

Didn't work. Same error.

Are you saying that I have to use CStringT now? This can't be! The dialog control, where I am having this problem, contains a simple edit box. When I use the "Add Member Variable Wizard" to associate a variable with my edit box, I select "Value" for the category. It automatically sets the type to CString. I have been using CStrings throughout my program successfully until this morning. The problem has appeared only because I want to search the string.

It is saying that I must use a PCXSTR pointer as the parameter. I have looked at the documentation for this but I cannot see how to convert a simple, NULL terminated string into one of these. Also, I cannot event get the compiler to recognize PCXSTR.

Any ideas?
Thank you,
Mark

Re: What Happened to CString ?!?

toxcct5-Apr-06 5:43

toxcct

5-Apr-06 5:43

CString IS CStringT !!! Sigh | :sigh:

it is like this for unicode uses...

Re: What Happened to CString ?!?

Jethro635-Apr-06 5:59

Jethro63

5-Apr-06 5:59

Listen, I appreciate your help. I'm not trying to be contentious. You obvious know more about this that I do, however, I cannot see how you can say that "CStringT IS CString".

I'll just take my existing dialog header file and include a member variable:

CStringT m_strHello;

Here is the avalanche of errors that this generates:

c:\Development\uLTD\Software\uLTDTagConfigure\DecodedLogDlg.h(48) : error C2955: 'ATL::CStringT' : use of class template requires template argument list
c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc\include\cstringt.h(2245) : see declaration of 'ATL::CStringT'
DecodedLogDlg.cpp
c:\Development\uLTD\Software\uLTDTagConfigure\DecodedLogDlg.h(48) : error C2955: 'ATL::CStringT' : use of class template requires template argument list
c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc\include\cstringt.h(2245) : see declaration of 'ATL::CStringT'
c:\Development\uLTD\Software\uLTDTagConfigure\DecodedLogDlg.cpp(59) : error C2512: 'ATL::CStringT' : no appropriate default constructor available
c:\Development\uLTD\Software\uLTDTagConfigure\DecodedLogDlg.cpp(63) : error C2662: 'ATL::CStringT<basetype,stringtraits>::~CStringT' : cannot convert 'this' pointer from 'ATL::CStringT' to 'ATL::CStringT<basetype,stringtraits> &'
Reason: cannot convert from 'ATL::CStringT' to 'ATL::CStringT<basetype,stringtraits>'
Conversion requires a second user-defined-conversion operator or constructor

How can it be the same?
Mark

Re: What Happened to CString ?!?

toxcct5-Apr-06 6:15

toxcct

5-Apr-06 6:15

Jethro63 wrote:
I cannot see how you can say that "CStringT IS CString".

the CString library is more complicated, but simply consider this :

#define CString CStringT

Re: What Happened to CString ?!?

David Crow5-Apr-06 5:56

David Crow

5-Apr-06 5:56

Jethro63 wrote:

Didn't work. Same error.

How are you calling the Find() method?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: What Happened to CString ?!?

Jethro635-Apr-06 6:10

Jethro63

5-Apr-06 6:10

I have just realized the problem and it is so stupid that I can hardly belive my eyes: The pointer to the NULL terminated string that I was passing as parameter 1 was NOT a pointer to an NULL terminated string. It was a pointer to an array of pointers to NULL terminated strings.

I will now go and look for another line of work.
Thanks for trying to help an idiot.
M.

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