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First of all: why do you need such conversion ? Most of the time, you can simply use TCHAR strings and everything sould be fine. You only need such conversions in very very specific cases (e.g. you developp a UNICODE application and you are using a library which doesn't support UNICODE, ...). I suggest you read this excellent article[^], things will be a bit clearer for you.
For your code snippet, there are quite some errors. If you want to retrieve the lenght of a string, don't use sizeof but strlen (or it's equivalent unicode version). Furthermore, your code snippet is incomplete, so it is difficult to understand. What is itemWChar ? Is that a typo and it should be _itemWChar or is it another variable ?
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Hey Thanks for response.
Well I have a function which takes the list of Strings as input. Now I need to supply this list into another function which does not take this list directly. As the 2nd function takes the input in form of LPWSTR*, hence I have to convert it. In below code itemWChar is defined as ATL::CComBSTR and _itemWChar is the string which is going to have the value of each ItemId in every iteration of loop. I think I am clear now....????
//itemIds is List<string^>^. (I am writing the managed code here)
for(DWORD i = 0; i < itemIds->Count; i++)
{
ATL::CComBSTR itemWChar;
itemWChar = ::GetAtlBstr(itemIds[i]);
WCHAR _itemWChar[_MAX_PATH];
memset(_itemWChar, 0, sizeof(_itemWChar) / sizeof(_itemWChar[0]));
memcpy(_itemWChar, static_cast(itemWChar), itemWChar.ByteLength());
items[i] = _itemWChar;
}
Please let me know if you can solve this.
ANURAG VISHNOI,
Sr. Software Engineer,
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If you are using managed code, then you should ask your question in the managed C++ forum. This forum is for C++ only.
Anyway, the link I gave you could still be very usefull to understand the different strings.
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Hey - don't crosspost[^] - it's rude.
Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p
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i want to design a PCM detecter so i ve to program encoder and decoder for this in C++.
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NamraHayee wrote: PCM detecter so i ve to program encoder and decoder
How are these related?
NamraHayee wrote: code required
Good joke Namra!
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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is it a joke?than what else i can do to design a pcm detecter? 
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For instance, you may actually design it instead of issuing 'get me codez plz'.
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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Codeproject has an example[^] of convert mp3/wav to pcm maybe its helpful for you.
Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )
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hi,all.
i have a puzzle for this problem that i can use ON_EN_CHANGE like this:
ON_EN_CHANGE(IDC_IPADDRESS_NVR_IPADDR, OnFieldchangedIpaddressNvrIpaddr)
i thought ON_EN_CHANGE can only used for CEdit control because MicroSoft defined the ON_EN_CHANGE:
#define ON_EN_CHANGE(id, memberFxn) \
ON_CONTROL(EN_CHANGE, id, memberFxn)
and
#define EN_CHANGE 0x0300
and in MSDN:
Edit Control Handlers
ON_EN_CHANGE( <id>, <memberfxn> ) afx_msg void memberFxn( );
all of these defined in CEdit, so why i can used in IPCtrl? thank u very much.
</memberfxn></id>
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kaviniswell wrote: all of these defined in CEdit, so why i can used in IPCtrl? thank u very much.
Because the IP Address control is made up of four edit controls, so IP address control must be forwarding this message to it's parent window.
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Because the IP Address control is made up of four edit controls, so IP address control must be forwarding this message to it's parent window.
---------
the IP Address control is made up of four edit controls? but we know:
class CIPAddressCtrl : public CWnd
{...
class CEdit : public CWnd
{...
so it seems like no this relation between CIPAddressCtrl and CEdit?
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What I meant was these edit controls are it's child controls. This MFC class is just a wrapper around it's SDK version, so you don't those edit controls as members.
Use Spy++ to locate these edit controls.
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ok, i see. thank u very much.
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Nibu babu thomas wrote: Use Spy++ to locate these edit controls.
humm.. teaching hacking!
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You
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ThatsAlok umm.. teaching hacking!
Naah, an interesting tool to use when developing in windows. There is another one called WinID (quick and fast, very useful to me )
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Hello guys,
Hope you can help me with this one.
For example,
BYTE buf[100000]; // contains binary data of an image
I wanted it to be written in an image file(*.bmp).
Thanks in advance.
modified on Wednesday, April 22, 2009 10:28 PM
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 You can use CFile object to write or read a binary file.
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Thanks for the comment.
Well I have tried using CStdioFile and had successfuly created a file but the file cannot be opened to any image viewer. Error message implied of the wrong header.
// my code here
CStdioFile fp;
CFileException e;
if(fp.Open("c:\\Image.bmp",CFile::modeCreate|CFile::modeWrite|CFile::typeBinary,&e))
fp.Write(&buf,100000);
// end
* file was created and not 0 byte.
Did I use it wright? or There's something wrong with my code?
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You can write as following:
CStdioFile fp_read,fp_write;
CFileException e;
char buf[1024];
fp_read.Open("c:\\ImageSrc.bmp",CFile::modeRead|CFile::typeBinary,&e);
fp_write.Open("c:\\Image.bmp",CFile::modeCreate|CFile::modeWrite|CFile::typeBinary,&e);
while (int count = fp_read.Read(buf,sizeof(buf)))
{
fp_write.Write(buf,count);
fp_write.Seek(0,CFile::end); // Important! You lose it!
fp_read.Seek(0,CFile::current); // Important! You lose it!
}
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I have tried your code but has an error accessing Image.bmp.
Another thing is that I will not copy from a bitmap file to another bitmap file.
Instead, I have already a binary data in an array to copy to a bitmap file.
Hope you can help me with this.
Thanks.
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Your code：fp.Write(&buf,100000);
The length of buf may be not enough. So you haven't copy the whole binary data.
Are you sure there are all binary data in the array?
If the answer is YES,you may use cycle to write in a bitmap file.Every time write 1024B binary data or more;
My code which send to you have no error when it runs in my computer.You may send me your error information.
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Well, of course if you want to have a valid bmp image in the file, you should follow the .bmp file format. You can't just write a bunch of bytes into a file and expects that it will be interpreted as a bitmap. See here[^] for more information.
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Cedric Moonen wrote: ...if you want to have a valid bmp image in the file, you should follow the .bmp file format. You can't just write a bunch of bytes into a file and expects that it will be interpreted as a bitmap.
His initial post indicated that buf "contains binary data of an image."
"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown
"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
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For me, "binary data of an image" means the data part of the image (so, excluding the header). I think he has an array that he filled in some way with the values of the pixels of the image. Of course, this is just my opinion because he wasn't really clear.
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