Using SHFileOperation. - C / C++ / MFC Discussion Boards

Shibu.V.Nair9-Jul-02 18:31

Shibu.V.Nair

9-Jul-02 18:31

Hi all,
Is it possible for me to check whether my multimedia speakers are muted, through software?.If yes how can I remove the 'mute' using software?
With regards

Shibu K.V.
Senior Research Associate.
VLSI ASIC Hardware Design Group
Electronics R&D Centre,Trivandrum
India

help me help me Pleaseee>>>>>>>>

Anonymous9-Jul-02 18:25

Anonymous

9-Jul-02 18:25

hi all.
i have to Read the data for a Particular Portion of a wave file, as an Integer array or a Byte array.
how i can i use the "mmioRead" function for above.
Please help me very urgent
thanks in advance.

Re: help me help me Pleaseee>>>>>>>>

Christian Graus9-Jul-02 19:41

Christian Graus

9-Jul-02 19:41

I see you need the answer enough to ask three times, but not enough to create an account......

Anyhow, I do not know the answer, but if it's in a wav FILE then surely you can read the data using iostreams ?

Christian

I am completely intolerant of stupidity. Stupidity is, of course, anything that doesn't conform to my way of thinking. - Jamie Hale - 29/05/2002

creating an image "transition" in gdi+

el_robert9-Jul-02 17:51

el_robert

9-Jul-02 17:51

I'm writing a slide show screen saver, and I want the images to fade in every 5 seconds. I got the fading part working, it's just that as soon as it finishes drawing it seems to be throwing a WM_ERASEBKGND message(or so i'm guessing), rather than waiting the 5 seconds it is supposed to. Any ideas on how to make this work or another method of getting the desired effect? I am a beginner so I would rather not have to use mfc because that would mean having to do a workaround for it to work with scrnsave.lib.

here is what my onPaint function looks like:

PAINTSTRUCT ps;
HDC hdc;
float alphas[] = {0.2f,0.4f,0.6f,0.8f,1.0f};

hdc = BeginPaint(hwnd, &ps);

Graphics graphics(hdc);

...code that gets "filename" is irrelevant so i didnt include it...

Image image(filename);

int x = (GetSystemMetrics(SM_CXSCREEN) / 2) - (image.GetWidth() / 2);
int y = (GetSystemMetrics(SM_CYSCREEN) / 2) - (image.GetHeight() / 2);

ImageAttributes imageAtt;

int iWidth = image.GetWidth();
int iHeight = image.GetHeight();

for(int i=0;i

for loop was cut off in first post

el_robert9-Jul-02 17:53

el_robert

9-Jul-02 17:53

this is what the for loop looks like:

for(int i=0;i<sizeof(alphas);i++){
ColorMatrix colorMatrix = {1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f, alphas[i], 0.0f,
0.0f, 0.0f, 0.0f, 0.0f, 1.0f};

imageAtt.SetColorMatrix(&colorMatrix, ColorMatrixFlagsDefault, ColorAdjustTypeBitmap);

graphics.DrawImage(&image,Rect(x,y,iWidth,iHeight),0,0,iWidth,iHeight,UnitPixel,&imageAtt);
}

How can ISAPI_Filter call the functions of Soap_Server?

ansoe9-Jul-02 17:19

ansoe

9-Jul-02 17:19

Hi All,

I have a problem regarding SOAP & ISAPI_Filter.

Now, I'm trying to write an ISAPI Filter(Dll), I'd like to call the function of Soap_Server(DLL) via ---.WDSL.
But my ISAPI Filter can't CONNECT to Soap_Server. My Soap_Server is for some data manipulation, using MS SOAP Toolkit 2.0 & VC++ 6 . I can call it's functions from other Soap_Client programs(MFC/VB exe). But my ISAPI Filter can't call.

So, How can ISAPI_Filter call the functions of Soap_Server?

Anyone have the sample code for that?
Any article about that?

The following Connect() function of ISAPI Filter can't CONNECT to my Soap_Server

bool CPlugIn_IIS5Filter::Connect()
{
HRESULT hr;

CString NewWSDL="http://MyWebServer/SoapSvr/MyDBSOAP.WSDL";
if(m_WSDLConnected != NewWSDL)
{
if (m_pSoapClient != NULL) m_pSoapClient.Release();
hr = m_pSoapClient.CreateInstance(__uuidof(SoapClient));
if(FAILED(hr))
{
// DisplayHResult(_T("Cannot create SoapClient."), hr);
return false;
}
try
{
m_pSoapClient->mssoapinit((LPCTSTR)NewWSDL, _T(""), _T(""), _T(""));
}
catch(_com_error err)
{
// DisplayFault(_T("Cannot initialize SoapClient. "));
return false;
}
m_WSDLConnected = NewWSDL;
}
return true;
}

If you have any info, pls forward to me.
Any other way to connect Soap_Server?

Thanks and best regards
Aung
aungns@sensecurity.com

How much memory is used?

Antosha9-Jul-02 17:17

Antosha

9-Jul-02 17:17

Is there a way to find out in VC6 how much memory is being used by the application at any given point of execution, and what variables are using this memory?

A reasonable man adapts himself to the world. An unreasonable one persists, trying to adapt the world to himself. That is why all the progress in the world depends on the unreasonable men.

Using SHFileOperation.

David Fleming9-Jul-02 16:58

David Fleming

9-Jul-02 16:58

I keep getting an error message telling me that the file cannot be found UNLESS I hard-code the name of the file to work on (in this case delete).

Here's the code:

SHFILEOPSTRUCT fileOp;
CString sSrc; //this is actually declared and set earlier
fileOp.hwnd = this->m_hWnd;
sSrc = pItem->sCol4; //pointer to a STRUCT containing CStrings
fileOp.pFrom = (LPCSTR)sSrc; //Source path+name
fileOp.pTo = "\0"; //Unhandled exception if I don't set this
fileOp.fFlags = FOF_NOCONFIRMATION | FOF_SILENT;
fileOp.wFunc = FO_DELETE;
int iRes = SHFileOperation(&fileOp);

It seems apparent that the problem is in the conversion from the CString to LPCSTR for fileOp.pFrom. It works fine if I replace the line "fileOp.pFrom...." with

fileOp.pFrom = "C:\\Dummy.txt";

The strings look correct in the debugger window, so I'm at a loss here.

I've tried various different castings and even tried using sSrc.GetBuffer(n) where n is various different values. None of those things seems to make a difference.

So what's the snag? Any suggestions?

Re: Using SHFileOperation.

Michael Dunn9-Jul-02 19:23

Michael Dunn

9-Jul-02 19:23

pFrom must be a double-null-terminated string. It is actually the Win32 version of a string list - one null-terminated string after the other, with two nulls to mark the end. The version where you set pFrom to a string literal just happens to work, even though the correct literal is "c:\\dummy.txt\0".
You'll need to set up a character buffer (not a CString because CString does not handle embedded nulls) and use that for pTo.

--Mike--
Just released - RightClick-Encrypt v1.3 - Adds fast & easy file encryption to Explorer
My really out-of-date homepage
Sonork-100.19012 Acid_Helm

Re: Using SHFileOperation.

David Fleming10-Jul-02 6:59

David Fleming

10-Jul-02 6:59

I had noticed in the documentation that .pFrom (and .pTo) had to be double-null terminated, but I did not realize that CStrings would not handle the nulls. Thanks.

Oh, BTW, it worked with "c:\\Dummy.txt", "c:\\Dummy.txt\0", and "c:\\Dummy.txt\0\0".

However, I confess that I'm lame where string manipulation is concerned. I've fiddled with it and still can't get it to work. Here's what I've got:

fileOp.hwnd = this->m_hWnd;
sSrc = pItem->sCol4;
char szSrc[255]; //my buffer for the string
strcpy(szSrc, (LPCTSTR)sSrc); //this works fine
int iSize = strlen(szSrc); //len appears OK
strcat(szSrc, "\0\0"); //append double nulls
iSize = strlen(szSrc); //debugger says len is same (?)
fileOp.pFrom = szSrc;
fileOp.pTo = "\0\0";
fileOp.fFlags = FOF_NOCONFIRMATION | FOF_SILENT;
fileOp.wFunc = FO_DELETE;
SHFileOperation(&fileOp);

Ugh! I'm clearly missing something rather fundamental.

Thanks.

Re: Using SHFileOperation.

Michael Dunn11-Jul-02 16:07

Michael Dunn

11-Jul-02 16:07

strcat(szSrc, "\0\0"); has no effect. Watch the szSrc array in the memory watch window and you'll see. None of the C string functions work with embedded nulls, because the first null ends the string. What I do is zero-fill the array so no matter how long the actual file name is, there will be zeros after it.

char szSrc[MAX_PATH+1] = {0};

--Mike--
Just released - RightClick-Encrypt v1.3 - Adds fast & easy file encryption to Explorer
My really out-of-date homepage
Sonork-100.19012 Acid_Helm

Re: Using SHFileOperation.

David Fleming11-Jul-02 21:32

David Fleming

11-Jul-02 21:32

Yeah, I noticed that the strcat(szSrc, "\0\0") did nothing.

Thanks for the suggestion (zero filling the array) -- it worked like a charm.

I just don't think I would have ever thought of it.

BTW, I've enjoyed your articles. Keep up the excellent work and thanks a bunch.

Expression to Binary Tree

Anonymous9-Jul-02 16:34

Anonymous

9-Jul-02 16:34

I want to transform a expression to a binary tree but I face some problems. So I need some examples. Where can I find such sources?

Re: Expression to Binary Tree

Rage9-Jul-02 23:04

Rage

9-Jul-02 23:04

What kind of expression ?

~RaGE();

Re: Expression to Binary Tree

Anonymous10-Jul-02 4:28

Anonymous

10-Jul-02 4:28

Such as 9*(8-7) or a+b-c

Re: Expression to Binary Tree

Rage10-Jul-02 5:13

Rage

10-Jul-02 5:13

Ok, if i remember right, someonehas already asked for such a thing. I remember having programed such a thing a long time ago. If u let me 2 days, i´ll find that code back.

Background is simple : you have to parse the expression backwards (i think this was because i´ve used functions such as cos(), so if you are not you may parse it forwards), watch for the parenthesis level (each time a ( is opened, par. level increases an decreases when a ) is found)). Once you get the max level (so you´ll get the first thing to compute regarding operation priority), you look for *+-/ or ^ which are always nodes in the binary tree. Numbers (4, 5647, etc) are always leaves. These operators have two children. Functions like sin() and the - have only one child.

bla bla ... i guess the code will be more explicit Big Grin | :-D

Just mail me back in 2 days if i forgot you Hmmm | :|

Mmmh ... i smell an article ...

~RaGE();

Re: Expression to Binary Tree

C^hris L^osinger10-Jul-02 5:23

C^hris L^osinger

10-Jul-02 5:23

a google search turned up plenty of them.

-c

To explain Donald Knuth's relevance to computing is like explaining Paul's relevance to the Catholic Church. He isn't God, he isn't the Son of God, but he was sent by God to explain God to the masses.
/. #3848917

Image Processing - easy, like Sunday morning.

How to Update Dialog Box

Solero9-Jul-02 16:29

Solero

9-Jul-02 16:29

Hi,

I have 2 dialog boxes. Dialog box 'A' will call dialog box 'B'. Both have same list control. If I update list control of dialog box 'B' after it is been called by using dialog box 'A', list control of dialog box 'A' must also update. How do I do it?..Please anybody Confused | :confused:

Re: How to Update Dialog Box

Christian Graus9-Jul-02 17:48

Christian Graus

9-Jul-02 17:48

This is bound to be in the FAQ. You need to store a pointer to the other dialog box, so you can interact with the controls. They cannot be synched automatically, you'll need to do it yourself.

Christian

I am completely intolerant of stupidity. Stupidity is, of course, anything that doesn't conform to my way of thinking. - Jamie Hale - 29/05/2002

Re: How to Update Dialog Box

Rage9-Jul-02 23:07

Rage

9-Jul-02 23:07

Another solution (but i warn you the real one is the one with pointer which Christian told you about), is to simply post a user defined message with PostMessage, intercept it with a OnMyMessage function in which you update the list.

~RaGE();

Save Data Problem

chen9-Jul-02 15:33

chen

9-Jul-02 15:33

Hi,

How to save the data from the editable multi-column List Control
to a txt file? Would you please tell me a simple method or a project for doing this?

Thanks in advance!

chen

Serialize function stops working all of a sudden

Comfortably Numb9-Jul-02 12:54

Comfortably Numb

9-Jul-02 12:54

Hello,
All of a sudden, I am having this bug. When I open a file with a .raw
extension, the serialize function gets called, file read and everyone is
happy. However, when I try to open another file, .dat, the serialize
function does not get called at all. I put a breakpoint at the beginning of
the function but the code does not even go there.

The function checks the file extension and can handle both file types.

The open file dialog shows both types and I can select either.

It was working fine this morning, and I do not know what happened. I compiled my backup copy from yesterday which I know was working, same thing. However, the same code works just fine on another PC.

I am running windows XP pro.

Any ideas?

Many thanks,
CN

Re: Serialize function stops working all of a sudden

Joaquín M López Muñoz9-Jul-02 13:10

Joaquín M López Muñoz

9-Jul-02 13:10

Probably the extension .dat has been reassociated with another program. Try opening the explorer, right clicking on a .dat file while pressing the shift key, selecting "Open with...", pushing "Another..." and selecting your program.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

How to use this Code?

NickOne9-Jul-02 10:58

NickOne

9-Jul-02 10:58

Hello all,

This is code from the MSDN page. I used there code to create Child windows and am a little lost. I made a onFileNew2 and when I click New2 (based on the ID_FILE_NEW2) it runs this code (which by the way is in the Mainframe class of an MDI project)and opens a child window.

I wrote code that opens Bitmaps, but I can't open a bitmap onto this. How coudl I utilise this code to something?? it sure would be nice to use it to open Bitmaps.

Thanks,

And sorry for asking so many questions

/////////////////////////////////////////////////////////////////////////////
// CMainFrame message handlers

// Example 1:
// CMainFrame::OnFileNewCMdiChildWnd() is a menu command handler for the
// CMainFrame class, which in turn is a CMDIFrameWnd-derived class.
// It shows the creation of a standard Windows MDI child window using
// the registered CMDIChildWnd class.
void CMainFrame::OnFileNewCMdiChildWnd()
{
CMDIChildWnd* pMDIChildWnd = new CMDIChildWnd;
VERIFY(pMDIChildWnd->Create(
NULL, // standard CMDIChildWnd class
_T("My MDIChildWnd"), // caption of MDI child window
WS_CHILD | WS_VISIBLE |
WS_OVERLAPPEDWINDOW, // window styles
rectDefault, // default rectangle size
this)); // parent window; can be NULL

// the default PostNcDestroy handler
// will delete this object when destroyed
}

Help on WMF/EMF to file

Jim Crafton9-Jul-02 10:26

Jim Crafton

9-Jul-02 10:26

OK I am creating a EMF/WMF DC
if I pass in a a filename to the CreateEnhMetaFile/CreateMetaFile
function and then use the resulting DC
to draw with and draw text on it, no text shows up
when I load the file in a program like PowerPoint, etc
(though curiously the File Open Dialog's preveiw does
show the text IF I output a WMF - nothing for a EMF)

Now if I create the meta file with a NULL filename (which
according to the docs is supposed to make one on memory)
and then say copy it to the clipboard and paste it into
PowerPoint all is good.
Any clues ? I have wasted the better part of an afternoon in
extreme frustration so any help would be much appreciated !

Thanks

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