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Here it is (pretty straightforward):
HKEY hKey;
if (RegCreateKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon", 0, NULL, REG_OPTION_NON_VOLATILE, KEY_READ, NULL, &hKey, NULL) == ERROR_SUCCESS)
{
BYTE lpBuffer[1024];
DWORD dwType;
DWORD dwBufferSize = 1024;
if (RegQueryValueEx(hKey, "DefaultUserName", 0, &dwType, lpBuffer, &dwBufferSize) == ERROR_SUCCESS)
{
...
}
}
The query succeeds, but the buffer is simply empty (though the setting isn't); if I change Winlogon to "Ports" and the key name to "COM1:", I get the correct value.
http://www.renderpal.com
http://www.shoran.de
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Are you working with the 32 or 64 bit version of Windows?
The difficult we do right away...
...the impossible takes slightly longer.
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64 bit; the program is 32 bit, though.
http://www.renderpal.com
http://www.shoran.de
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That might be the problem.
Try calling RegCreateKeyEx as such:
RegCreateKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon", 0, NULL, REG_OPTION_NON_VOLATILE, KEY_READ | KEY_WOW64_64KEY, NULL, &hKey, NULL)
Use the KEY_WOW64_64KEY flag to indicate that you want to open the 64-bit view of the key.
The difficult we do right away...
...the impossible takes slightly longer.
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That did it! You really saved my day, Richard. My MSDN docs don't include that extra flag (VS 2005 still...), so I didn't know about it.
http://www.renderpal.com
http://www.shoran.de
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Glad I could help. 
The difficult we do right away...
...the impossible takes slightly longer.
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Hi,
I've been using MFC Dev Studio 97 with VC 5++, MFC 42, etc for near 20 years, and it does exactly what I want it to do. In other words, I have absolutely no reason to fork out for an upgrade. The compiler and Wizards works fine under Windows 7.
One problem is that Win7 does not pass the 'Genuine Windows' test as soon as the program is installed on a Win7 computer. I know it is no longer supported. That however does not make it illegal to use! I paid big money for it at the time!
Another problem is, that the Help System fails to display anything. That started with XP SP 2, which could then be fixed with a Registry Setting relating to MK_PROTOCOL. XP-SP3 stripped away more help files.
At the moment, we have several Win98 computers running just to access the Help Files.
However There must be a better solution.
Regards,
Bram.
Bram van Kampen
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Hi,
I am new in development and I need some help and I'll greatly appreciate your help. We have deployed a kit which is scanning wifi and and bluetooth devices and storing them into the device's local database (device is linux debian) with smartphone's ID and other stuff. My first task is to write a c or c++ program which can parse those received frames and format them according to our own database and then send it in xml format to our own event handler which will eventually send it to our database.
Thank you very much in advance looking forward for your response.
Kind regards
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I want to write a code which can parse the received frames from the device to an xml file and send it to our database. I broke that task into pieces and first is to write that proram to parse any file into an xml format but it will be my first time so I don't know how to start or can I use an API for that some samples would be great.
Thank you in advance.
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Member 10125032 wrote: I broke that task into pieces and first is to write that proram to parse any file...
Do you have code to read this file? That would be a good starting point. Until you get past this, XML and database stuff are irrelevant.
"One man's wage rise is another man's price increase." - Harold Wilson
"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
"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles
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You can use XmlLite[^] to write simple XML data.
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Member 10125032 wrote: We have deployed a kit ...My first task is to write a c or c++ program which can parse those received frames and format ... in xml format to our own event handler
Steps
- Get the spec for the 'kit' to determine what it stores.
- Read the data.
- Parse it according to what you learned from the spec. It is unlikely that any complex solutions would be required for this (hopefully, but the spec is the source.)
- The parser will create an internal format (list of structs probably) of your own devising. Probably very close to what you want to put into the xml.
- Determine what the xml looks like. Either find out what it already expects. Or design it. If the latter then someone needs to tell you what data they expect. Otherwise you have no idea what you need to get.
- Write the internal format out to xml form based on the previous step.
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Hi all
I am writing a program to submit some files in a SQL server 2012 the problem is:
when the file size is around 255 KBytes it's all ok, but when the file is greater there is an error on "RecordSet.Update() phase. The error is : "The Pointer Value type Text, NText or image conflicts with the specified column name. ..."
The Column is declared in table as varbinary(max) the code is:
CFile file(szPathFileToOpen, CFile::modeRead);
ULONGLONG filelen = file.GetLength();
rsAttachments.AddNew();
rsAttachments.m_AttachmentsID=szUniqueID;
rsAttachments.m_FileName=m_ListAttached.GetItemText(0,0);
GlobalFree( rsAttachments.m_FileData.m_hData );
if((rsAttachments.m_FileData.m_hData=GlobalAlloc(GMEM_MOVEABLE,filelen))==NULL)
{
AfxMessageBox(_T("memory error"));
}
LPVOID pVoid = NULL;
if((pVoid=GlobalLock(rsAttachments.m_FileData.m_hData))== NULL)
{
AfxMessageBox( _T( "memory error" ));
}
file.Read(pVoid, filelen);
rsAttachments.SetFieldDirty( &rsAttachments.m_FileData, TRUE );
rsAttachments.SetFieldNull( &rsAttachments.m_FileData, FALSE );
rsAttachments.m_FileData.m_dwDataLength=GlobalSize(rsAttachments.m_FileData.m_hData );
rsAttachments.Update();
GlobalFree( rsAttachments.m_FileData.m_hData );
Thanks in advance to the angel will help me.
Giovanni
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Where is the code that raises the error and what are the values of the parameters being referenced?
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i am a novice with a DB programming i have put now a CDBException that return me this:
m_strStateNativeOrigin = "State:37000,Native:7125,Origin:[Microsoft][ODBC SQL Server Driver][SQL Server]
State:S1000,Native ,Origin:[Microsoft][ODBC SQL Server Driver]
It's good this?
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Sorry, that means nothing. You need to show the exact code that causes the error, and include the values of all the parameters being used.
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Ok already posted the code the problem occur in the moment i call Update, and when the file is greater than 255kb
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So have you stepped into Update(), using the debugger, to see where the exception is being thrown from?
"One man's wage rise is another man's price increase." - Harold Wilson
"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
"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles
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Have you verified that GlobalAlloc actually worked? Does file.Read() actually read the full file? Check the return value of the Read function to see how many bytes have been read.
255K doesn't seem that large. However, the Global** functions and the CFile class are ancient, and I wouldn't be surprised if they had some built-in restrictions...
On a sidenote, since you immediately lock the memory after allocation, why do you use GMEM_MOVEABLE? And since you immediately free the memory after use, why do you even use the GLOBAL** functions at all, why don't you simply use new and delete instead? That would be faster, requires less code, and takes less effort to read and understand the code!
GOTOs are a bit like wire coat hangers: they tend to breed in the darkness, such that where there once were few, eventually there are many, and the program's architecture collapses beneath them. (Fran Poretto)
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Stefan_Lang wrote: why
Stefan_Lang wrote: why do you
Stefan_Lang wrote: why don't you
Copy & Paste ?
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Hi,
Drakelor wrote: when the file size is around 255 KBytes it's all ok, but when the file is greater there is an error on "RecordSet.Update() phase. The error is : "The Pointer Value type Text, NText or image conflicts with the specified column name. ..."
You are probably storing the file into a BLOB column. All SQL columns usually have a maximum size. The error message is probably correct... if you attempt to stuff 256 KBytes into a 255 KByte data field you will obviously get an error.
I suspect that you need to regenerate your database tables. This time choose a larger column size.
Best Wishes,
-David Delaune
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I finally resolved the issue. I explain to you.
1) Download last SQL server driver.
2) Rebind/Recreate the CRecordset, so it bind with varbinary(max) -> CBYTEARRAY
3) In Recordset Class in the line : RFX_Binary(pFX, _T("[FileData]"), m_FileData,15360000);
increase the last parameter to desidered max dimension (15MB in my case).
4) Write this simple code:
CFile cfFileToSave(szPathFileToOpen,CFile::modeRead);
rsAttachments.m_FileData.SetSize((INT_PTR)cfFileToSave.GetLength());
cfFileToSave.Read(rsAttachments.m_FileData.GetData(),(UINT)cfFileToSave.GetLength());
cfFileToSave.Close();
rsAttachments.SetFieldDirty(&rsAttachments.m_FileData,TRUE);
rsAttachments.SetFieldNull(&rsAttachments.m_FileData,FALSE);
rsAttachments.Update();
All done thanks all 
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i've problem within doing my final project, i've a project where the project can be transfer a image continues and real time. the transfer data using UDp SOcket. any referention for me to build it, i don.t know what must i do
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Irwan Saifranto wrote: i don.t know what must i do
A few possibilities come to mind.
- Choose a different subject, one that you do understand.
- Research the use of UDP sockets, and how to write your own data management protocol.
- Switch to TCP and research some of the many samples available on the internet.
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