Re: Encrypt / decrypt a text file using vc++ - C / C++ / MFC Discussion Boards

Re: Message Notification when we change any view?

Naveen27-Oct-09 0:34

Naveen

27-Oct-09 0:34

yogeshs wrote:
But I m not getting WM_STYLECHANGED notification while changing view in a dialog

Do the open file dialog have windows XP theme?

yogeshs wrote:
.I am having the handle of listview But I need some notifiction from where i can get viewtype?

You have to subclass the window proc of the list view and inside that, you have to check for the WM_STYLECHANGED/LVM_SETVIEW message. You can use SetWindowSubclass() function to subclass the window proc.

nave

[OpenedFileFinder] [My Blog]

Re: Message Notification when we change any view?

David Crow27-Oct-09 3:11

David Crow

27-Oct-09 3:11

yogeshs wrote:
...where i can get viewtype?

Have you tried sending the control a LVM_GETVIEW message?

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Sorting Filenames in CFileDialog

softwaremonkey26-Oct-09 23:10

softwaremonkey

26-Oct-09 23:10

Hi,

Is there a way to configure a CFileDialog so that it displays the files in date order by default without the user having to choose this?

Thanks

Tony

Re: Sorting Filenames in CFileDialog

Adam Roderick J27-Oct-09 0:19

Adam Roderick J

27-Oct-09 0:19

Just look this [^]

Величие не Бога может быть недооценена.

Re: Sorting Filenames in CFileDialog

softwaremonkey27-Oct-09 3:40

softwaremonkey

27-Oct-09 3:40

Great thanks. Thumbs Up | :thumbsup:

Tony

Encrypt / decrypt a text file using vc++

kamalilam26-Oct-09 21:13

kamalilam

26-Oct-09 21:13

how to encrypt / decrypt a text file(*.txt) using vc++

Re: Encrypt / decrypt a text file using vc++

CPallini26-Oct-09 21:39

CPallini

26-Oct-09 21:39

This looks promising: Example C Program: Encoding and Decoding Data.
Smile | :)

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[My articles]

Re: Encrypt / decrypt a text file using vc++

Hristo-Bojilov26-Oct-09 21:40

Hristo-Bojilov

26-Oct-09 21:40

kamalilam wrote:
how to encrypt / decrypt a text file(*.txt)

I suppose the file format doesn't matter.

See here for sample how to use win32 cryptoapi. Smile | :)

Life is a stage and we are all actors!

Re: Encrypt / decrypt a text file using vc++

Rajesh R Subramanian26-Oct-09 22:29

Rajesh R Subramanian

26-Oct-09 22:29

The Cryptography Reference is here: http://msdn.microsoft.com/en-us/library/aa380256(VS.85).aspx[^]

You may be particularly interested in CryptEncrypt[^] and CryptDecrypt[^] functions.

Take a look at these examples: Encrypting a file[^] and Decrypting a file[^]

“Follow your bliss.” – Joseph Campbell

How to find unsued disk space in a Disk programatically.

Shiv Murti Pal26-Oct-09 20:16

Shiv Murti Pal

26-Oct-09 20:16

hi all
i want to develop an application in which i need to find unused disk space in a disk. please guide me how it will possible using C++/VC++/MFC

Re: How to find unsued disk space in a Disk programatically.

Adam Roderick J26-Oct-09 20:31

Adam Roderick J

26-Oct-09 20:31

Use can use GetDiskFreeSpaceEx API to get the free disk space in a disk. Just refer for more details[^]

Величие не Бога может быть недооценена.

modified on Tuesday, October 27, 2009 2:43 AM

Re: How to find unsued disk space in a Disk programatically. [modified]

Kushagra Tiwari26-Oct-09 20:57

Kushagra Tiwari

26-Oct-09 20:57

Use these functions and get the free space Smile

double funcToGetDriveFreeSpace(LPSTR drive)// give drive name here
{
BOOL success;
CString driveName = drive;
driveName.Append(_T(":\\"));
//LPCTSTR DiskDirectory = _T("C:\\"); // directory name
__int64 AvailableBytes; // number of bytes on disk available to the caller
__int64 TotalBytes; // number of bytes on disk
__int64 FreeBytes; // free bytes on disk
DWORD SectorsPerCluster=0; // pointer to sectors per cluster
DWORD BytesPerSector=0; // pointer to bytes per sector
DWORD FreeClusters=0; // pointer to number of free clusters
DWORD TotalClusters=0; // pointer to total number of clusters

//char FmtNumber[20];
double Size;
char Units[3];

success = GetDiskFreeSpaceEx((CHAR*)driveName.GetString(), (PULARGE_INTEGER) &AvailableBytes,
(PULARGE_INTEGER) &TotalBytes, (PULARGE_INTEGER) &FreeBytes);
if (!success)
{
success = GetDiskFreeSpace((CHAR*)driveName.GetString(), &SectorsPerCluster,
&BytesPerSector, &FreeClusters, &TotalClusters);
FreeBytes = FreeClusters * SectorsPerCluster * BytesPerSector;
TotalBytes = TotalClusters * SectorsPerCluster * BytesPerSector;
if (!success)
{
return -1;
}
}
if (success)
{
fmtsize(FreeBytes,(double&) Size, Units);
return Size;
}
}

void ::fmtsize( __int64 Number, double &Size, char Units[3])
{
const int KB = 1024;
const int MB = 1024*1024;
const int GB = KB*MB;
double DIV;
if (Number>GB)
{
DIV = double(GB);
strcpy(Units,"GB");
}else if (Number > MB)
{
DIV = double(MB);
strcpy(Units,"MB");

}else
{
DIV = double(KB);
strcpy(Units,"KB");
}
Size = Number / DIV;
}

If you like the answer mark this answer as GOOD and close the Thread.

Regards,
Kushagra

I hate coding but I luv to develop

modified on Tuesday, October 27, 2009 3:12 AM

Re: How to find unsued disk space in a Disk programatically.

Shiv Murti Pal26-Oct-09 21:17

Shiv Murti Pal

26-Oct-09 21:17

hello
basically i am developing an application in which i have to wipe the files/data from a disk those are deleted from the hard disk so tell me how i should do.

Re: How to find unsued disk space in a Disk programatically.

Kushagra Tiwari26-Oct-09 21:25

Kushagra Tiwari

26-Oct-09 21:25

See its not clear what you want to achieve. Give more details on what exactly is your goal, and please spare some time in explaining what have you achieved till now and what is required to be achieved. Please be specific in asking about what you want to do , else its all too vague.

Reagards,
Kushagra

Re: How to find unsued disk space in a Disk programatically.

Shiv Murti Pal26-Oct-09 21:46

Shiv Murti Pal

26-Oct-09 21:46

hi actually i have an Project to do, in that i have to wipe/clean a disk in a manner so that the deleted data of a disk can not be recovered by any Data Recovery Software.

for that i am doing following things -

1. I am reading the disk Sector by sector.
2. then i overwrite some new value on the sector so that the old one can not be recovered.

Now the problem is that in this process the whole disk is overwritten by a new pattern of value.

But actually i do not need this, i need to overwrite the value of only those file that have been deleted already.

so i need to find the deleted files sector.

For Example:-
if there is a deleted file starting at Sector no 2345 to 2356. So how to do it inmy application using VC++/C++/MFC

Thanks

Re: How to find unsued disk space in a Disk programatically.

Kushagra Tiwari26-Oct-09 22:20

Kushagra Tiwari

26-Oct-09 22:20

This might help you :

Reading and Writing to Raw Disk Sectors[^]

Re: How to find unsued disk space in a Disk programatically.

Adam Roderick J26-Oct-09 23:25

Adam Roderick J

26-Oct-09 23:25

Which File system, you are using?

Величие не Бога может быть недооценена.

Re: How to find unsued disk space in a Disk programatically.

Shiv Murti Pal31-Oct-09 2:11

Shiv Murti Pal

31-Oct-09 2:11

Windows NTFS and FAT Files system i am using

NTSC HD video via HDMI output the hard way.

ChicagoBobT26-Oct-09 13:28

ChicagoBobT

26-Oct-09 13:28

I have a multi channel video mixer and want to output the video via HDMI. I started with DirectShow but the latency is like 6 frames. Much too high for what I am doing. Then I moved to DirectX. The problem that instantly surfaced is I dont know when the current frame was sent or when to send the frame. I tried using WaitForVerticalBlank or sensing where the output is but that did not help. Is there a callback I dont know about or some special hook that will allow me to time my output?
High Frequency timer seems to be exteremly inaccurate.

HELP? ideas? Sample code? What I need is something that will allow me to send an interlaced frame of HD video with very low latency. I am trying to use a video board because of its low cost and the fact it should be able to be done.

Integrate CView desrived class into a dialog box

transoft26-Oct-09 12:13

transoft

26-Oct-09 12:13

Hi,

Is it possible to use a CView derived class to take over "Picture" Control in a dialog box?

I want to re-use CView-derived class functions in the dialog box.

Thank you very much,

Re: Integrate CView desrived class into a dialog box

Randor 26-Oct-09 16:27

Randor

26-Oct-09 16:27

Yes. You can draw anything you want on a CWnd derived window.

Best Wishes,
-David Delaune

Re: Integrate CView desrived class into a dialog box

Iain Clarke, Warrior Programmer27-Oct-09 3:17

Iain Clarke, Warrior Programmer

27-Oct-09 3:17

I looked in the Document/View section, and found this article:
Inserting a Doc/Frame/View in a dialog using a custom control[^]

You can't put in a View class all on it's own, you need some support classes. Hopefully this article has done the job for you. If so, give them a vote and a nice comment.

Iain.

I have now moved to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), or need contract work done, give me a job! http://cv.imcsoft.co.uk/[^]

Re: Integrate CView desrived class into a dialog box

transoft27-Oct-09 6:22

transoft

27-Oct-09 6:22

Hi Iain

Actually, I just need some CMyView functions and draw something in a dialogbox. I don't need the framework.

Anyway, I will have a try to directly integrate the CMyView into a Dialogbox.

Thanks,

Re: Integrate CView desrived class into a dialog box

David Crow27-Oct-09 6:35

David Crow

27-Oct-09 6:35

transoft wrote:
Actually, I just need...draw something in a dialogbox.

Such as?

Re: Integrate CView desrived class into a dialog box

transoft27-Oct-09 8:43

transoft

27-Oct-09 8:43

Hi
Such a circle. the important thing is that I want to re-use the functions of CMyView.

Thanks,

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