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I want to write a program in Visual C++ to transfer data between a computers and microcontroller via 10/100 Ethernet RJ-45.
What i need (libraries, or is there any help in MSDN.)
What i figured out is that i need "winsock" for programming.(TCP client and TCP Server)
Where should I start.
thanks
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How about here[^] and related articles.
By the way, posting to multiple forums isn't necessarily a good idea...
Steve S
Developer for hire
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In my application I hook Windows registry query's and read direct them to a file. I use the following code:
<br />
LONG __stdcall Mine_RegQueryValueExA(<br />
HKEY hKey,<br />
LPCTSTR lpValueName,<br />
LPDWORD lpReserved,<br />
LPDWORD lpType,<br />
LPBYTE lpData,<br />
LPDWORD lpcbData<br />
)<br />
<br />
{<br />
char * filename = "\\testapp.ini"; <br />
char buffer[_MAX_PATH];<br />
_getcwd(buffer, _MAX_PATH); <br />
strcat(buffer, filename);<br />
LPTSTR lpReturnedString = "";<br />
unsigned int nSize = MAX_PATH;<br />
GetPrivateProfileStringA("Section" , lpValueName, "\255", lpReturnedString, nSize, buffer);<br />
lpData = reinterpret_cast <LPBYTE> (lpReturnedString);<br />
LONG rv = ERROR_SUCCESS;<br />
return rv;<br />
<br />
<br />
__try {<br />
rv = Real_RegQueryValueExA (hKey,lpValueName,lpReserved,lpType,lpData,lpcbData);<br />
} __finally {};<br />
<br />
return rv<br />
}<br />
Now in a number of cases I get an error the the GetPrivateProfileString line along he lines of 'The memory could not be "written"'. Can anyone see what is causing this error as I really have no idea.
Thanks
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nSize is set to MAX_PATH whereas buffer is of size _MAXPATH. Do these match ?
~RaGE();
I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus
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stevelam wrote: LPTSTR lpReturnedString = "";
unsigned int nSize = MAX_PATH;
GetPrivateProfileStringA("Section" , lpValueName, "\255", lpReturnedString, nSize, buffer);
watch fourth parameter, it should be like this
char ReturnedString [ MAX_PATH + 1 ] ;
unsigned int nSize = MAX_PATH+1;
GetPrivateProfileStringA("Section" , lpValueName, "\255", ReturnedString , nSize, buffer);
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stevelam wrote: LPTSTR lpReturnedString = "";
unsigned int nSize = MAX_PATH;
GetPrivateProfileStringA("Section" , lpValueName, "\255", lpReturnedString, nSize, buffer);
lpReturnedString is a static string of size 1 (end of string character only). If you try to copy something in it, you will write outside the boundary of the allocated memory and thus overwriting memory you cannot write to.
Use a fixed size array instead ans pass its maximum capacity in the nSize paramter of the function.
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I was given an application that calls a driver which also calls interrupts at H/W level in order to update that BIOS of a ceratin laptop. However, I was asked to develop the application in such a way that I won't have to install the driver any more just to activate the interrupts for the BIOS update. Is it possible to do so and if yes, how can I proceed. The application by the way was made in Visual C++ ver. 6.0 so I assume that this is the right section for my query. Thanks a lot. 
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User mode code cannot directly control the hardware. You need the device driver to be able to do this.
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Thank you for the reply. However, I think I was not able to clarify my question. What I meant with the skipping of the device driver is the avoidance of installing the driver manually. As such, I was thinking
of dynamic loading of drivers but I have no idea about this and if this is applicable for all types of drivers. Thanks again.
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Hi all,
I would like to know, if someone knows how to get the physical address of an IP address for example(This is just an example):
192.168.0.100 -> www.sitename.com
I would like to resolve to IP address.
Many Thanx
Regards
Programm3r
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Programm3r wrote: resolve to IP address
gethostbyname()
Somethings seem HARD to do, until we know how to do them.
 _AnShUmAn_
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Thanx....
Regards
Programm3r
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hello,friends.can you give some codes about content-based audio retrieval or ActiveX control modules,thank you a lot.
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Requests along the lines of 'please write this for me' rarely get answered. What are you trying to do exactly ? What have you already done ? Where do you need help ? The more you show that you've done more than ask someone else to write your code, the more answers you will get.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Is there any control that can display the waveform of an audio file and can start, pause, resume and stop the playing of the audio file?
curiosity
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The windows media player control can play it, I wonder if there's a visualisation that just shows the waveform ?
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Christian Graus wrote: I wonder if there's a visualisation that just shows the waveform
yes, the "oscilloscop" visualization does it. but i am not sure you can select it from outside WMP...
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Hello,
I am facing a unique problem, that even if I include the header file, yet the class is not recognized. It gives me the error missing ; before (some variable) and errors generated subsequently. Please help.
Thanks and regards,
Software Developer
Sanjay Khapre
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See if class declaration is suppressed by some preprocessors.
Can you show how class is declared,included and used ?
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It is difficult to help without actually seing the code. Post the code for the class declaration and where it is used.
You probably forgot to add ; at the end of the class or you mispelled the name (remember it is case-sensitive).
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Hello,
I have attached the code. I have a dialog box in which I am placing a RichEdit box as a child window control. Without creating an object of RichEdit, how can I set its position inside its parent, that is the dialog box?
<br />
# include "MyRichEdit.h"<br />
class CMyRichEdit ;<br />
<br />
class CTrialRichEditBreakDlg : public CDialog<br />
{<br />
public:<br />
CMyRichEdit m_RichEdit ;<br />
CTrialRichEditBreakDlg(CWnd* pParent = NULL);
<br />
enum { IDD = IDD_TRIALRICHEDITBREAK_DIALOG };<br />
<br />
<br />
protected:<br />
virtual void DoDataExchange(CDataExchange* pDX);
<br />
protected:<br />
HICON m_hIcon;<br />
<br />
virtual BOOL OnInitDialog();<br />
afx_msg void OnPaint();<br />
afx_msg HCURSOR OnQueryDragIcon();<br />
afx_msg void OnDrawCircle();<br />
DECLARE_MESSAGE_MAP()<br />
};<br />
Thanks a ton. And what about my previous query posted, that is of not being able to trap F9 key in this same application, I have explained it in my previous query.
Sanjay.
-- modified at 5:44 Wednesday 23rd August, 2006
-- modified at 5:50 Wednesday 23rd August, 2006
-- modified at 6:01 Wednesday 23rd August, 2006
Software Developer
Sanjay Khapre
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where it is giving error ?
If Its CMyRichEdit.. , you need to show its declaration header file.
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Which I have already done.
Didn't you see the first line?
Software Developer
Sanjay Khapre
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