Re: How to hide a file (any file)? - C / C++ / MFC Discussion Boards

john_tran2-Nov-04 23:24

2-Nov-04 23:24

i want to write a program by C++ , that it will hide a file so that noone can see this file in the directory. What techonology of this i need to learn to do it by myself?
Thanks

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JohnJone

Re: How to hide a file (any file)?

jan larsen3-Nov-04 0:20

jan larsen

3-Nov-04 0:20

HANDLE hFile;
TCHAR  fileName = TEXT("C:\\myfile.txt");

hFile = CreateFile(
   fileName,
   GENERIC_WRITE,
   FILE_SHARE_READ,
   NULL,
   CREATE_NEW,
   <code>FILE_ATTRIBUTE_HIDDEN</code>,
   NULL);

"After all it's just text at the end of the day. - Colin Davies

"For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus

Re: How to hide a file (any file)?

john_tran4-Nov-04 3:25

john_tran

4-Nov-04 3:25

i know what you means. But i want to know other tech. Because if we set the file's attribute is "hide", user can easily unhide if they choose folder option/and choose unhide in windows.
I mean that i will hide all time even user set view unhide file. And just my program can set unhide attribute to the file only.

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JohnJone

Re: How to hide a file (any file)?

jan larsen4-Nov-04 3:32

jan larsen

4-Nov-04 3:32

Ah, well, then the answer is simple. It's just not possible Smile | :)

"After all it's just text at the end of the day. - Colin Davies

"For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus

Re: How to hide a file (any file)?

john_tran4-Nov-04 3:45

john_tran

4-Nov-04 3:45

Oh, i see some application can do that. But i dont know how they do that, what technology they use.

Re: How to hide a file (any file)?

jan larsen4-Nov-04 3:47

jan larsen

4-Nov-04 3:47

Really?, on Win32?
Got any links or names?

It sounds interesting, allthough the use of it goes beyond my imagination.

"After all it's just text at the end of the day. - Colin Davies

"For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus

Re: How to hide a file (any file)?

jan larsen4-Nov-04 3:49

jan larsen

4-Nov-04 3:49

By the way, how did you notice that the files were hidden Smile | :)

"After all it's just text at the end of the day. - Colin Davies

"For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus

Re: How to hide a file (any file)?

David Crow3-Nov-04 3:24

David Crow

3-Nov-04 3:24

john_tran wrote:
What techonology of this i need to learn to do it by myself?

How about SetFileAttributes()?

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

strtok, Find the next token in a string

gunnar662-Nov-04 23:07

gunnar66

2-Nov-04 23:07

Hi

I wan't to run my exe program and pass some arguments with the exe file. example:
MyProgram.exe "nr1,nr2,nr3,nr4,nr5"

This is some of the code:

int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
char *token;
char seps[] = ",";
token = strtok( lpCmdLine, seps );

This works ok in Visual C++, but i would like to do this in Emededd C++. There i get an error: error C2664: 'strtok' : cannot convert parameter 1 from 'unsigned short *' to 'char *'

How can I do this right?

Thanks!

Re: strtok, Find the next token in a string

GDavy3-Nov-04 0:02

GDavy

3-Nov-04 0:02

try casting your lpCmdLine var to char*
strtok( (char*)lpCmdLine, seps );

It seems strange, cuz LPSTR is an ANSI string...

Hope this helps you,
Davy

Re: strtok, Find the next token in a string

Anonymous3-Nov-04 0:28

Anonymous

3-Nov-04 0:28

This works ok

Thanks

Re: strtok, Find the next token in a string

jan larsen3-Nov-04 0:52

jan larsen

3-Nov-04 0:52

GDavy wrote:
It seems strange, cuz LPSTR is an ANSI string...

Not if you are compiling for unicode, then LPSTR is unsigned short *.

"After all it's just text at the end of the day. - Colin Davies

"For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus

Re: strtok, Find the next token in a string

GDavy3-Nov-04 0:59

GDavy

3-Nov-04 0:59

Nono,
LPTSTR is a Unicode format (wide char) in UNICODE and ANSI when not compiling for UNICODE
LPSTR is always ANSI string (8bit)
LPWSTR is always wide char string(16 bit)

But I used to be confused by these too..

Greetz,
Davy

Re: strtok, Find the next token in a string

jan larsen3-Nov-04 1:21

jan larsen

3-Nov-04 1:21

You're so right.
But regardless, it seems that something makes his compiler believe that LPSTR is defined as unsigned short *.

"After all it's just text at the end of the day. - Colin Davies

"For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus

Re: strtok, Find the next token in a string

jan larsen3-Nov-04 0:50

jan larsen

3-Nov-04 0:50

gunnar66 wrote:
error C2664: 'strtok' : cannot convert parameter 1 from 'unsigned short *' to 'char *'

It seems like you've defined UNICODE (or _UNICODE, I can't remember the definition for compiling for unicode precisely). If thats the case, then LPSTR translates to unsigned short * instead of char *.
strtok requires char * parameters, if you intended to use unicode strings, you should use wcstok instead.

[EDIT]A GDavy has corrected me, LPSTR should be defined as CHAR * and CHAR should again be defined as char. But if the code you've given us is the same you're using for your embedded version, then somehow LPSTR must be defined as unsigned short *[/EDIT]

"After all it's just text at the end of the day. - Colin Davies

"For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus

Problem CRichEditCtrl and scroll-messages

maty22-Nov-04 22:50

maty2

2-Nov-04 22:50

I have a problem with my class derived from CRichEditCtrl, I gladly text the Scroll event would intercept however it folds unfortunately.

White someone which there wrong I made?

BOOL CREditControl::PreTranslateMessage(MSG* pMsg)
{

switch(pMsg->wParam )
{
case VK_SCROLL:
//Test
AfxMessageBox("VK_SCROLL");
return true;
}

return CRichEditCtrl::PreTranslateMessage(pMsg);
}

thanks, Matthias

Help on Command Line Parameters

WinAPILearner2-Nov-04 21:45

WinAPILearner

2-Nov-04 21:45

Hi,
In a Win32 Application I would like to check if command line parameters
/b /a is provided. The Messagebox show me the parametters like
/b /a but the if condition do not met it alwasy the else statment
that apply.

if ("/b" == szCmdLine || szCmdLine == "/a")
{
MessageBox (NULL, szCmdLine,"met",0);
}
else
{
MessageBox (NULL, szCmdLine,"Not met",0);
}

I did also chcked "//b" == szCmdLine. What I am missing?
Regards.

Re: Help on Command Line Parameters

vcplusplus3-Nov-04 0:18

vcplusplus

3-Nov-04 0:18

if szCmdLine contains other parameters besides /a or /b, you will need to do this.

if (szCmdLine.Find("/b") >= 0 || szCmdLine.Find("/a") >= 0) 
{
    MessageBox (NULL, szCmdLine,"met",0);
}
else
{
    MessageBox (NULL, szCmdLine,"Not met",0);
}

Re: Help on Command Line Parameters

David Crow3-Nov-04 3:31

David Crow

3-Nov-04 3:31

Use Paul DiLascia's CCommandLineInfoEx class for this.

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

Trouble witn CreateWindow

lillah2-Nov-04 21:30

lillah

2-Nov-04 21:30

Hi,
I've created a win32 app, and it runs perfectly till i've added #include <shellapi.h> for using the systemtray icons.
The trouble is in CreateWindow, now it returns NULL.

I put the include in myapp.cpp and nothing, and I've put it in stdafx.h, neither.
However, if I don't use Shell_NotifyIcon, so I don't need this header, CreateWindow returns a valid value.

What am I doing wrong?

Thanks.

Put focus to App.

V.2-Nov-04 21:24

2-Nov-04 21:24

Hi,

Our app calls an instance of Word. A custom Toolbar in Word contains a button "Back to App", which will close the word instance and, on Win NT, returns to the app. In Xp however this is not the case. The focus is not necessarely set back to our app.

Can anyone give me a hint how to set the input focus from where it came.
I'm searching in the direction of SetActiveWindow/SetForegroundWindow. (correct?)

tnx for your help.

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

Re: Put focus to App.

Neville Franks2-Nov-04 23:37

Neville Franks

2-Nov-04 23:37

On XP and an application cannot set itself as the active app, however another app can. So using SetForegroundWindow( YourApp ) from Word should work correctly. I had a similar problem to this 3-4 weeks back. Do a search here on SetForegroundWindow() and you will find that thread and the respones I got.

Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"

Re: Put focus to App.

V.3-Nov-04 0:14

3-Nov-04 0:14

tnx a lot, I'll have a look into it, let's hope I do not have such problems as you had Smile | :)

.

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

Re: Put focus to App.

Rage3-Nov-04 4:47

Rage

3-Nov-04 4:47

In this article by Nish, there is a chapter How to steal focus on 2k/xp. It is meant for dialog boxes, maybe it can work with your app.

Some handy dialog box tricks, tips and workarounds[^]

Hope this helps

~RaGE();

Asynch Serial Comms

louis2-Nov-04 20:44

louis

2-Nov-04 20:44

Hi there

I am receiving asynch serial data successfully using a thread.
But I noticed that the time the data arrives is never the same. It actually arrives at say time (y), then at Time (y+1), (y+2)... until (y+10). Then it jumps back to time (y). The transmission time is accurate always at 100ms intervals.

Can anyone maybe tell me why this is the case AND what I should look for to correct it. Maybe a setting somewhere.

Thanks

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.