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Try this assuming D: is the hidden drive.
HANDLE hVol = ::CreateFile(_T("\\.\D:"), GENERIC_READ, 0, 0, OPEN_EXISTING, 0, 0);
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Hidden drive will not have drive letter, that is the problem. 
Nice talking to you.  If you judge people, you have no time to love them. -- Mother Teresa
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You mean, you don't see it.
But did you try it with CreateFile?
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Hi all,
I am trying to delete registry entries. my problem is i have deleted a particular value in a given sub key, but if any other value is present in that sub key then that sub key should not get deleted otherwise it should delete the sub key also..
I am not getting how to find out that there is a value in a subkey or that sub key is empty.
Is there some api present for doing so...
Thanks in advance
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Yes, use the RegEnumValue()[^] function, to get all the value entries in a key or sub key.
It's time for a new signature.
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And ignore the 'default' value
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That's why I always try to post sensible links in my answers; so people will learn where the documentation is and actually try to use it properly to help them learn.
It's time for a new signature.
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Hi,
I need to automate three applications that run on a single server, and I was planning to use Powershell with the Windows automation snapin. All my powershell scripts that can do the automated input/keyboard strokes are ready. However I need to be able to detect when an application requests focus.
So I have three apps running all maximized, only one has focus at a time. When one of the apps is done doing some calculations and expects input it requests focus. If it's not the current app that has focus, it starts flashing in the taskbar (so the window does not come to the front automatically). It's this flashing that I need to detect, so that it triggers my powershell script to bring the app to the front, so that it can do the input of data in the window.
I was thinking this could be a simple commandline app, e.g.:
detectappfocus.exe "Notepad"
Which would detect all focus requests from all the windows that have 'notepad' in the titlebar.
If a window requests focus it could then simply output the full title bar name to the command line. Assuming notepad with test.txt open requests focus, followed a bit later by another notepad with test2.txt open:
detectappfocus.exe "Notepad"
test.txt - Notepad
test2.txt - Notepad
I'm not sure this is a hard thing to do? Or is there a standard method to do this?
Thank you for your feedback!
Best regards,
Jan
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how to read an Excel files(.xls) with cell values using vc++...??
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If you have excel installed on your system, read this[^]
If you don't have Excel installed, you should find some library which will do that for you (You could do it yourself, and I could even explain how, but that will take us too far).
Oh,and next time you post, try to be less polite and more descriptive in your title...
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Directly reading .xls files from Visual C++ would be cumbersome. I see two options:
- Use automation (there are a lot of articles about, here at
CodeProject, see, for instance, this list [^] ). - Export the
.xls file to .csv one format and then read the latter.
BTW: As posting guidelines suggest, a more meaningful message title would be appreciated.
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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CPallini wrote: more meaningful message title would be appreciated.
Beat me to it 
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I've used BasicExcel - A Class to Read and Write to Microsoft Excel[^] in the past, and it works pretty well. It's worth mentioning that I only needed to perform certain simple read operations.
Using excel automation would be ideal if you're going to do complex tasks.
“Follow your bliss.” – Joseph Campbell
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can u send me a sample project?
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I cannot send you anything. However, the page I linked you to earlier has a sample project and some text that you can read up.
“Follow your bliss.” – Joseph Campbell
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Dear gurus,
I'm having a problem in using ParseDisplayName.
1) I have a path of USB drive, such as: G:\
2) I pass this driver path into my function, which will call
ParseDisplayName to get PIDL item, as below:
LPITEMIDLIST CTemp::getItemIDList( CString p_strPath )
{
USES_CONVERSION;
if( p_strPath.IsEmpty() )
{
return NULL;
}
LPITEMIDLIST l_pIDL;
LPSHELLFOLDER pDesktopFolder;
if( ::SHGetDesktopFolder( &pDesktopFolder ) != NOERROR )
{
return NULL;
}
OLECHAR ochPath[MAX_PATH];
ULONG chEaten;
ULONG dwAttributes;
HRESULT hRes;
::MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, W2A(p_strPath), -1, ochPath,
MAX_PATH );
hRes = pDesktopFolder->ParseDisplayName( NULL, NULL, ochPath, &chEaten,
&l_pIDL, &dwAttributes);
pDesktopFolder->Release();
return l_pIDL;
}
3) The hRes result is 0x80070003 指定されたパスが見つかりません.
I don't know why it was failed.
I also try another way to solve this bug and I realize that, if i access to
this USB drive before calling ParseDisplayName, this method ParseDisplayName
always return good result, S_OK, such as:
a) Call the function ParseDisplayName at the first time, right after calling
ParseDisplayName again, the hRes result will be S_OK.
b) Declare a file path variable to one file in USB drive.
Call ParseDisplayName with this file path, then call ParseDisplayName with
the USB drive path, the hRes result will be S_OK.
c) Use while loop to browse each drive after using CSIDL_DRIVES, then
calling ParseDisplayName, the hRes result will be S_OK.
So can you help me to explain two issues:
1) Why does the ParseDisplayName method fail in this case ?
2) Why does the ParseDisplayName method success after accessing the USB
drive at first time?
If anybody here had the same situation like mine, please help me to clarify
the mystery surrounding this phenomenon.
I'm looking forward to seeing your replies.
Best regards,
Jetflower
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I not sure but, but I think had faced the same problem some moths ago and at that time when I changed the CoInitializeEx to CoInitialize( or reverse ) the problem go fixed. Could you please try changing it?
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Yes, that could be it. If your threading model is wrong, the shell won't be able to execute except when you call in to it, which explains that it does not see your drive before you allow it execute. See my other answer on this thread.
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Your HRESULT indicates WIN32/PATH_NOT_FOUND. The only thing I can imagine is that the shell has not 'seen' your USB drive yet (i.e. it hasn't handled the mount on the G: reparse point and updated it's data structures). Calling into the shell once (through ::SHGetDesktopFolder) causes it to execute some code, and probably notice the mount event. Subsequent calls will the succeed.
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Hi Friends,
I have an interesting question for all.
How can i restrict a dialog box(Modal or modeless) to stay within the
application boundaries?
Just like CView derived objects will not move out of application.
I know we can do it with OnMove(..) event handling.
But, i wanted to know whether there are any other direct means
like by setting some properties to CDialog class.
Please help me with this.
Regards,
K ARUN KUMAR
modified on Tuesday, May 4, 2010 5:30 AM
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Add some code in your OnInitDialog() method (where you handle the WM_INITDIALOG message) to set your diaolg's window within the confines of its parent Window, assuming it is large enough.
It's time for a new signature.
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Hi Richard,
As advised I have limited the size to be with in the application.
But, the problem comes when user is trying to move the dialog.
It goes out of application boundaries. I want a functionality
similar to CView child objects which stay with in the MainFrame.
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Hi Arun,
To the best of my knowledge, it doesn't get any better than handling the move messages.
If you also handle the move/size messages of the parent, you'll know what your boundary dimensions without requesting them specifically every time your child dialog is moved. (unless of course mfc does this for you behind the scenes)
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