Re: converting LPCWSTR to char[] - C / C++ / MFC Discussion Boards

You don't access the USB port the same way you access a serial port (so, you don't specify the "port name" to the CreateFile function). Instead you get a handle to a device driver which will communicate with the USB device. So, you need to give the identification of this driver to the CreateFile function. This is of course totally dependant of which USB device you are trying to communicate with. Normally, this should be described in the documentation of the controller board.

Cédric Moonen
Software developer

Charting control [v1.3]

I defined a data type in a base calss .h file , not in the calss and all the dreived classes are flash the below error, Any advice pls.... I need this enum to be access to all the dlg class

error LNK2005: "enum ABC @@A) already defined in kkk.obj

And also the below warining
warning LNK4006:

add a #pragma once at the beginning of your .h file...

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

It is already added.

ptr_Electron wrote:
error LNK2005: "enum ABC @@A) already defined in kkk.obj

See here.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Inside the code i need to convert the LPCWSTR to char[] ,anybody have a clue???

//
// Print the name of the user account.
//
wprintf(L"\t-- %s\n", pTmpBuf->usri3_name);

printf("\n equlilent string is [%s]\n ",(char*)pTmpBuf->usri3_name);
// here i get only single char

vineesh

modified on Thursday, March 5, 2009 4:28 AM

Please click on the "edit" link in your post, remove EVERYTHING and ask a specific question with "relevant" source code, if any.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

vineeshV wrote:
wprintf(L"\t-- %s\n", pTmpBuf->usri3_name);

printf("\n equlilent string is [%s]\n ",(char*)pTmpBuf->usri3_name);

a simple cast is not enough, you need a string conversion, for instance using WideCharToMultiByte, see this sample.

Smile | :)

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

vineeshV wrote:
wprintf(L"\t-- %s\n", pTmpBuf->usri3_name);

printf("\n equlilent string is [%s]\n ",(char*)pTmpBuf->usri3_name);

Have you tried:

printf("\n equivalent string is [%S]\n ",(char*)pTmpBuf->usri3_name);

They don't necessarily hurt anything, but you might also consider removing those unnecessary #include statements.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

//How to convert wide char
int iSize = WideCharToMultiByte(CP_ACP,0,pTmpBuf->usri3_name, -1, NULL, 0, NULL, NULL );
char* lpNarrow = new char[iSize];
lpNarrow[0] = 0;
iSize= WideCharToMultiByte(CP_ACP, 0,pTmpBuf->usri3_name, -1, lpNarrow, iSize, NULL, NULL );
printf("\n equlilent string is [%s]\n ",lpNarrow);
delete [] lpNarrow;

//How to print wide char
printf("\n equlilent string is [%S]\n ",pTmpBuf->usri3_name);

best wishes,
-David Delaune

Thanks David,
it really works for me ...
The beer is for you !!!!!!!!

vineesh

Hi,
I developed an application in MFC dialog,
where i am printing the Html page using ExecWB command.
The problem is, initially my application memory consumption is low.
But when i call print command (ExecWB) the memory usage rises
tremendously.
But for further execution of command its stable..!!

I am not getting whats the exact problem is..??
Plz help me in this regard..

Thanx in advance.

Reagards
Shiva

Maybe it's something internal to the ExecWB() function.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Do u have any idea or solution how to overcome this problem..?

Reagards
Shiva

void CWebBrowser2::ExecWB(long cmdID, long cmdexecopt, VARIANT* pvaIn, VARIANT* pvaOut)
{
static BYTE parms[] =
VTS_I4 VTS_I4 VTS_PVARIANT VTS_PVARIANT;
InvokeHelper(0x1f6, DISPATCH_METHOD, VT_EMPTY, NULL, parms,
cmdID, cmdexecopt, pvaIn, pvaOut);
}

Actually its internally calling 'InvokeHelper' which may b using some
stack..

Reagards
Shiva

Can you show us what ExecWB() is doing?

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

someobj.ExecWB(OLECMDID_PRINT, 0 , NULL, NULL);

I used MS-WebBrowser ocx(CWebBrowser2)

Reagards
Shiva

Whoops! I thought you had a different ExecWB() in your own namespace and asked for that code. I think agree with what David has said above.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

I don't see any problem there.
Don't you like such a behaviour?
BTW What is ExecWB?

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

CPallini wrote:
BTW What is ExecWB?

It's a method of both IWebBrowser2 and CHtmlView.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

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

What might be going wrong?? is it starting any new Process??? if yes, can i stop it? This ExecWb takin up huge memory (~20MB). i am sure about the huge number i mentioned (checked it in Task manager's Memory Usage - windowsXP). Any help is most appreciated or is there any other way that I can Print the html document (I am using CWebBrowser2).

Reagards
Shiva

Shivarudrayya H wrote:
What might be going wrong??

Probably nothing.

Shivarudrayya H wrote:
is it starting any new Process???

Probably not, since you see a huge increment of your application memory usage.

Shivarudrayya H wrote:
his ExecWb takin up huge memory (~20MB).

Why bother about. After all, it is doing the job for you.

Shivarudrayya H wrote:
Any help is most appreciated or is there any other way that I can Print the html document (I am using CWebBrowser2).

I don't know a lightweight approach, I'm not an expert about. Maybe CWebBroweser2 support some kind of configuration, but it is only a guess.
Smile | :)

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

What might be going wrong?? is it starting any new Process??? if yes, can i stop it? This ExecWb takin up huge memory (~20MB). i am sure about the huge number i mentioned (checked it in Task manager's Memory Usage - windowsXP). Any help is most appreciated or is there any other way that I can Print the html document (I am using CWebBrowser2).

Reagards
Shiva

Shivarudrayya H wrote:
This ExecWb takin up huge memory (~20MB).

And why does this concern you?

Shivarudrayya H wrote:
...(checked it in Task manager's Memory Usage - windowsXP).

Which can be deceiving. Read this, especially the last part.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne