|
How to convert PWSTR to char * ?
thanx![Rose | [Rose]](https://www.codeproject.com/script/Forums/Images/rose.gif)
|
|
|
|
|
Here's an example of doing that:
char szBuffer[255];
WideCharToMultiByte(CP_ACP,
0,
,
-1,
szBuffer,
sizeof(szBuffer),
NULL,
NULL);
Cheers,
Tom Archer
Author, Inside C#
Author, Visual C++.NET Bible
A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the af
|
|
|
|
|
hey tom
can you not just use:
USES_CONVERSION;
*pChar = W2A(*pWideChar);
????
situations to avoid #37:
"good morning ... how many sugars do you take in your coffee ... and what was your name again?"
coming soon: situations to avoid #38: "...and the dog was there too?"
|
|
|
|
|
Lauren,
I asked Tom this very question just now. I was about 30 seconds later than you were though 
Nish
The posting stats are now in PDF:-
http://www.busterboy.org/codeproject/
Feel free to make your comments.
Updated - May 04th, Saturday
|
|
|
|
|
hehe
great minds nish great minds
situations to avoid #37:
"good morning ... how many sugars do you take in your coffee ... and what was your name again?"
coming soon: situations to avoid #38: "...and the dog was there too?"
|
|
|
|
|
|
lauren wrote:
great minds nish great minds
Yeah I guess so
Nish
The posting stats are now in PDF:-
http://www.busterboy.org/codeproject/
Feel free to make your comments.
Updated - May 04th, Saturday
|
|
|
|
|
Yep. Does the same thing and definitely much less typing and remembering of parameter values. Great catch!
By the way, check out what these macros expand to 
Original C++ code
void SayHello2(PWSTR wstrName)
{
USES_CONVERSION;
AfxMessageBox(W2A(wstrName));
}
Expanded macros
void SayHello2(PWSTR wstrName)
{
int _convert = 0;
_convert;
UINT _acp = ATL::_AtlGetConversionACP() ;
_acp;
LPCWSTR _lpw = 0;
_lpw;
LPCSTR _lpa = 0;
_lpa;
AfxMessageBox((((_lpw = wstrName) == 0) ? 0
: (_convert = (lstrlenW(_lpw)+1)*2,
AtlW2AHelper((LPSTR) _alloca(_convert),
_lpw,
_convert,
_acp))));
}
Cheers,
Tom Archer
Author, Inside C#
Author, Visual C++.NET Bible
A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the af
|
|
|
|
|
|
Hi Tom
I am not at all experienced with ATL, but I was wondering why we cannot use W2A macro to achieve what the guy wanted to do!
Nish
The posting stats are now in PDF:-
http://www.busterboy.org/codeproject/
Feel free to make your comments.
Updated - May 04th, Saturday
|
|
|
|
|
Like a lot of things in Windows development, there's more than one way to accomplish this task. I'm just more accustomed to using the Win32 functions. As I told Lauren, using the ATL macros is certainly a lot less typing and remembering of parameters and therefore, probably the better way to accomplish this conversion task.
Cheers,
Tom Archer
Author, Inside C#
Author, Visual C++.NET Bible
A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the af
|
|
|
|
|
Tom Archer wrote:
Like a lot of things in Windows development, there's more than one way to accomplish this task. I'm just more accustomed to using the Win32 functions. As I told Lauren, using the ATL macros is certainly a lot less typing and remembering of parameters and therefore, probably the better way to accomplish this conversion task.
I think it's cool to know multiple ways to do something. It can be quite handy at times.
Nish
p.s. Got my mail? [with ppt]
The posting stats are now in PDF:-
http://www.busterboy.org/codeproject/
Feel free to make your comments.
Updated - May 04th, Saturday
|
|
|
|
|
Especially something like this where the person may need to use the Win32 SDK.
Regarding the PPT. Yes, thank you. I replied to you.
Cheers,
Tom Archer
Author, Inside C#
Author, Visual C++.NET Bible
A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the af
|
|
|
|
|
The most serious drawback of W2A, W2CA, xx2xx, is that for each invocation, new stack space is allocated. So, you can't really use them in a loop.
Other than that, I use them all the time. 
Tim Smith
I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?
|
|
|
|
|
Tim Smith wrote:
The most serious drawback of W2A, W2CA, xx2xx, is that for each invocation, new stack space is allocated. So, you can't really use them in a loop.
I think these issues have been partially improved in ATL 7.0
Nish
The posting stats are now in PDF:-
http://www.busterboy.org/codeproject/
Feel free to make your comments.
Updated - May 04th, Saturday
|
|
|
|
|
Hello,
I have still problem for adding a column to DataGrid programicaly ...
Then i wanna join the Column to a Field from my DataSource, too ...
Please help me ...
My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html
Hadi Rezaie
|
|
|
|
|
Hello.
I have an idea for a program I would like to design and implement using C++. This program will produce a list of websites based on what the user wants to search. For example, let say the user enters "c++ programming." The program will log onto Google.com and conduct a search for "c++ programming." It will browse all responses pages and save all websites into a text file (one line per website URL). One done, the user will have a list of relevant websites.
From an implementation perspective, is the program above simple enough using C++ and Winsock? I should be able to setup a socket to connect to a search engine such as Google and/or Yahoo. That is about all I know right now. I do not know how to gather the information after I have connected to, say, a website. Please include a possible implementation using Winsock if you know of one.
Thanks,
Kuphryn
|
|
|
|
|
try ravi's webresourcegrabber class )on the front page of cp)
it looks like a good place to start
situations to avoid #37:
"good morning ... how many sugars do you take in your coffee ... and what was your name again?"
coming soon: situations to avoid #38: "...and the dog was there too?"
|
|
|
|
|
kuphryn wrote:
From an implementation perspective, is the program above simple enough using C++ and Winsock? I should be able to setup a socket to connect to a search engine such as Google and/or Yahoo. That is about all I know right now. I do not know how to gather the information after I have connected to, say, a website. Please include a possible implementation using Winsock if you know of one
I don't think winsock is a good idea for this. It is to low level, it'll force you to learn HTTP protocol (not to complicated, but still waste of time). I recommend WinInet, it's high level library which comes with IE and gives more comfortable access to HTTP.
As for information gathering, it is search engine dependent. Most use syntax like www.google.com/search?something or similar.
Felix.
|
|
|
|
|
Thanks.
I have never heard of WinInet. Is that part of MFC and IE? The authors of the network programming (Windows) I am reading have not mentioned WinInet.
Kuphryn
|
|
|
|
|
kuphryn wrote:
I have never heard of WinInet. Is that part of MFC and IE?
It comes with IE. It's a C based DLL. But there are plenty classes wrapping it. For more check http://msdn.microsoft.com/library/default.asp?url=/workshop/networking/wininet/wininet.asp
Felix.
|
|
|
|
|
Thanks.
I will continue studying Winsock for now. I will look into WinInet after Winsock.
Kuphryn
|
|
|
|
|
hRsrc = FindResource(hInst, lpString, "AVI")
I'm confused about the third parameter. In the MSDN page for FindResource I see things like this for the 3rd param:
RT_ACCELERATOR Accelerator table
RT_ANICURSOR Animated cursor
RT_ANIICON Animated icon
RT_BITMAP Bitmap resource
... etc.
However, I can't find anything about using "AVI", "IMAGE", etc. for the third param.
The reason I ask is because I'm getting this error:
cannot convert parameter 3 from 'char [6]' to 'const unsigned short *'
When I use this statment:
HRSRC hRsrc = ::FindResource(hInst,
MAKEINTRESOURCE(nIDRes),
"IMAGE"); // type
Thanks!
|
|
|
|
|
are you compiling with
#define _UNICODE
?
situations to avoid #37:
"good morning ... how many sugars do you take in your coffee ... and what was your name again?"
coming soon: situations to avoid #38: "...and the dog was there too?"
|
|
|
|
|
No, I am not using #define _UNICODE. Should I be?
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
