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There is a reason that parts of the registry can be only changed by administrators. To store user dependant information use the HKCU (current user) tree where you can write with user privileges.
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In win7 ,When open UAC,it also cannot write registry,how
to avoid
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The registry is like a file system with different access rights for the different keys. Navigate to your key using regedit and open the 'Permissions' command from the context menu to see the permissions for specific users and groups. Some keys have restricted access even for administrators (SAM, SECURITY). Such keys can be only accessed by the SYSTEM user.
So the answer to your question is: You must have the access rights which are usually granted when you open the key using the account of the key's owner.
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HKEY_CURRENT_USER also cANNOT write
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At the moment I know only two reasons for denied permissions when trying to write to HKCU:
- Using
RegOpenKeyEx(), the key was not opened with the KEY_SET_VALUE or KEY_WRITE access right. - Using
RegOpenKey() instead of RegOpenKeyEx().
Regarding the second reason I will cite the MSDN:
Quote: The RegOpenKey function uses the default security access mask to open a key. If opening the key requires a different access right, the function fails, returning ERROR_ACCESS_DENIED. An application should use the RegOpenKeyEx function to specify an access mask in this situation.
If this does not solve your problem, you should show us the code that fails (including the RegOpenKeyEx() call).
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How can I get CBitmap from CDib ? I have tried in follow way:
CBitmap Bitmap;
Bitmap.FromHandle((HBITMAP)pDoc->m_Dib->m_hBitmap);
doesn't work ... can you help me ? Thank you.
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There are four GDI functions that can be used to converts DIBs to DDBs: CreateDIBitmap(), SetDIBits(), and SetDIBitsToDevice(), and StretchDIBits().
Have a look at the Bitmap Basics - A GDI tutorial[^] article. The sources contain sample code to convert bitmaps.
Google will give you also a lot of results when feeding it with the above function names or 'DIB to DDB'.
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Sir i have an base class which has an pure virtual member function..i have made it and also made other member function. now this is a general base class.i want that member member functions in derived class by their virtual function in which i can get the member function of base class and can do individual operation in each derived class.. what will be the syntax code for this problem how i can do these things? please reply my soon because this is my last day of assignment.. please
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Sir i have mail you.. please check and teach me how i can use member member function of base class in virtual function of derived class for individual operations
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That can add file header comment and function comment automatically.
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The better way you can record one and edit that macro on your choice simple..
Jibesh V P
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You will get a EN_KILLFOCUS message,when the focus switch from CIPAddressCtrl to another control, and this is normal case. But when you click at the dots among four ip fields,
you will get the EN_KILLFOCUS message too(with SPY++), which is not what I want, because I just want to do data validation when
the CIPAddressCtrl lost focus. How can I filer the EN_KILLFOCUS message when I click the dots??? 
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Not sure if this will work or not, but in the message handler for EN_KILLFOCUS, check where the focus "went" with GetFocus[^] or CWnd::GetFocus[^] (whichever suits you best) and determine if the newly focused control is still "inside" the IP address control. I suspect it has four separate edit fields for each segment and all four have the IP address control thing set as its parent, so i supose a GetParent[^] or CWnd::GetParent[^] call can tell you if the user is still editing the IP address or is trying to leave the control altogether.
If you try this, do share with us if it worked or not, thanks in advance.
> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> If it doesn't matter, it's antimatter.<
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Thank you mat.
You are right.I just call GetFocus and determine weather the
EN_KILLFOCUS comes from the focused control.
BOOL CMyDlg::OnCommand(WPARAM wParam, LPARAM lParam)
{
UINT notificationCode = (UINT)HIWORD(wParam);
if (notificationCode == EN_KILLFOCUS || notificationCode == CBN_KILLFOCUS)
{
HWND hwnd = (HWND)lParam;
if (hwnd == NULL)
{
return false;
}
CWnd* pWnd = CWnd::FromHandle(hwnd);
int nID = pWnd->GetDlgCtrlID();
if (GetFocus() != NULL && GetFocus()->m_hWnd == pWnd->m_hWnd)
{
return false;
}
GetParent()->PostMessage(UM_KILLFOCUS, nID, 0);
}
return CDialog::OnCommand(wParam, lParam);
}
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A bit less "specific" than the approach i might have chosen, but if it works for you, then great! 
> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> If it doesn't matter, it's antimatter.<
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I am looking for a way to save a matrix (essentially an array) of data that has the intensity information for each pixel into an avi file.
I want the avi file to be of no size limits and uncompressed. This is on an NTFS system with windows XP or greater.
Any ideas or tutorials?
PKNT
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AVI is a video file, that is a sequence of frames (and possibly related audio). If you have pixel intensity then you have one frame. Am I missing something?
Veni, vidi, vici.
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Thanks for your reply. Yes, you are correct and we dont even have audio. I already have a way to save videos, but when saving longer videos, I am facing issues such as file index corruption etc and these longer videos are very important for us as they are research data.
I am looking for a new better way tos ave videos without any problems.
PKNT
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Would AVIFileWriteData do the trick?
"The AVIFileWriteData function writes supplementary data (other than normal header, format, and stream data) to the file."
I hope you are well aware that there are at least three Win32 API for working on audio / video files.
The "AVI", "capAVI" and "wave".
I am curently using capAVI and recomend always to use whatever standard status/ error reporting API's are avaiable in the particular set.
Cheers
Vaclav
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Try to Google "ffmpeg" this library helps you to write avi files with very little hassle. You can even choose coded or write uncompressed files using their example code included in the library download.
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hello guys... im trying to write a small recording program. But waveInOpen fails with error code 11. Here is what I am trying.
LPHWAVEIN phWaveIn = NULL;
WAVEFORMATEX pcmWaveFormat;
::memset(&pcmWaveFormat, 0, sizeof(WAVEFORMATEX));
pcmWaveFormat.wFormatTag = WAVE_FORMAT_PCM;
pcmWaveFormat.nChannels = 1;
pcmWaveFormat.nSamplesPerSec = 11025L;
pcmWaveFormat.nAvgBytesPerSec = 11025L;
pcmWaveFormat.nBlockAlign = 1;
pcmWaveFormat.wBitsPerSample = 8;
MMRESULT rResult;
rResult = IsFormatSupported(&pcmWaveFormat, WAVE_MAPPER);
if(rResult != MMSYSERR_NOERROR) return;
rResult = ::waveInOpen(phWaveIn, WAVE_MAPPER, &pcmWaveFormat, 0, 0, CALLBACK_NULL);
if(rResult != MMSYSERR_NOERROR)
{
CString sErrorMsg;
if(rResult == MMSYSERR_ALLOCATED)
sErrorMsg = "Specified resource is already allocated.";
else if(rResult == MMSYSERR_BADDEVICEID)
sErrorMsg = "Specified device identifier is out of range.";
else if(rResult == MMSYSERR_NODRIVER)
sErrorMsg = "No device driver is present.";
else if(rResult == MMSYSERR_NOMEM)
sErrorMsg = "Unable to allocate or lock memory.";
else if(rResult == WAVERR_BADFORMAT)
sErrorMsg = "Attempted to open with an unsupported waveform-audio format.";
}
What could be wrong? Thanks
This world is going to explode due to international politics, SOON.
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Your first parameter is supposed to be a pointer to a handle buffer, it should be:
HWAVEIN hWaveIn = NULL;
rResult = ::waveInOpen(&hWaveIn, WAVE_MAPPER, &pcmWaveFormat, 0, 0, CALLBACK_NULL);
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