Regular DLL - C / C++ / MFC Discussion Boards

Re: Need API to access the user group to which a currently logged in user belongs

humps12-Feb-05 0:17

12-Feb-05 0:17

Hi there,
Do you mean you want to list the groups of the user running your program?

I think the process is (sorry I don't have any example code):

ImpersonateSelf() - to generate an access token for the current process

OpenThreadToken() - to open the access token

GetTokenInformation() specifying TokenPrimaryGroup or TokenGroup as one of the parameters - to get a data structure with group information

Then walk the structure from this last function, looking for the group SID or SIDs.

Finally, to convert a SID to an actual text group name, use:

LookupAccountSid()

Hope this is a pointer in the right direction !

Thanks,

Neil Humphreys.

Re: Need API to access the user group to which a currently logged in user belongs

ThatsAlok12-Feb-05 0:35

ThatsAlok

12-Feb-05 0:35

look at NetUserGetLocalGroups defined in LM.h under PSDK

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Re: Need API to access the user group to which a currently logged in user belongs

~Worried!13-Feb-05 16:52

~Worried!

13-Feb-05 16:52

Thanks guys....

HTTP Post Data Processing

humps11-Feb-05 23:35

humps

11-Feb-05 23:35

Hi,
I am looking for some neat code to process HTTP Post request content data - i.e. tidy up all those '+'s and '%'s, and split the POST content string into variable name / variable value pairs. I could try this myself, but I do hate reinventing wheels ... can anyone suggest some code to do this ?

Thanks,

Neil Humphreys.

Re: HTTP Post Data Processing

Ravi Bhavnani12-Feb-05 5:09

Ravi Bhavnani

12-Feb-05 5:09

Will this[^] article help?

/ravi

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Re: HTTP Post Data Processing

humps12-Feb-05 9:45

humps

12-Feb-05 9:45

Thanks for the reply.
Your article is a web client, which writes POST requests (presumably). However, I am after web server code, which reads POST requests.
Sigh | :sigh:

Thanks,

Neil Humphreys.

Re: HTTP Post Data Processing

Ravi Bhavnani12-Feb-05 11:18

Ravi Bhavnani

12-Feb-05 11:18

Sorry, I should have ready your post more closely before replying. Meanwhile, will this[^] collection of classes help?

/ravi

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Regular DLL

Alfred Furer11-Feb-05 23:03

Alfred Furer

11-Feb-05 23:03

VC++.net : I have a problem, maybe someone can help me.

I try tu make a DLL to use with a client (Cocreate ME10).
I created a Regular DLL with MFC statically linked.
Then i created a CDialog with a CComboBox and a CListbox what i like
to fill with Items from a Database.

In the CDialog Class i created a Control variabel to the CCombobox:
CComboBox m_ctlCbNames;
To make work my modeless Dialog i use :

BOOL WINAPI FilterDllMsg(LPMSG lpMsg)
{
AFX_MANAGE_STATE(AfxGetStaticModuleState());
TRY
{
return AfxGetThread()->PreTranslateMessage(lpMsg);
}
END_TRY
return FALSE;
}

If i load the DLL in my Client application the Dialog appears without
any Problems.

But if i try to add a string to the Combobox control variabel :
m_ctlCbNames.AddString(_T("Test"));
or
m_ctlCbNames.SetCurSel(0);

then i get the following Error when i call my function in the DLL from
my client program :

Debug Assertion Failed !
...vs70builds\...\afxwin2.inl
Line757

alfred.furer@skynet.be
Confused | :confused:

RFC - Duplicate file finder features

Subhobroto11-Feb-05 20:40

Subhobroto

11-Feb-05 20:40

I made a very nice duplicate file finding utility for myself a few months ago.

Now I just wanna share it with you guys (altough I am not very sure who would ever require such a tool ! Anyone ?)

However, I just want to add some more features to the basic framework.

The basic engine just creates a hash table of filenames which are kind of open chained using linked list of filenames which have the same MD5/SHA/etc digest (that is, are binary equal)

It currently finds out any duplicate file(s) in/on your directory/drive and deletes all but the file with the most recent timestamp.

That's all I wanted, but I understand that it's the least somebody who seriously wants to use such tool would want !

So please, let me know who might want it, and what feature(s) should I add to it....

Given enough takers, I might write up a nice article to go along with the source code.

In the meanwhile, keep the feature requests rolling in...

Regards

Subhobroto Sinha

http://www.geocities.com/subhobrotosinha

Socket Programming

Member 90098711-Feb-05 20:21

Member 900987

11-Feb-05 20:21

Hello Freinds,

I want to transfere one structure from client to server. structure contains one String and INT data, INT is the length of that string.

I am trying send(); function of CSocket to transfere the structure but I am getting some garbage at server end and missing my strings address.

Can anyone pl's help me.
I have dought that the function I am using may not be currect.

Thanks.
Dinesh.

Re: Socket Programming

ThatsAlok11-Feb-05 23:15

ThatsAlok

11-Feb-05 23:15

why don't you directly transfered the string to the server!,as recv winsock api returnd with total length of data recieved.

something like this way, i am giving win32 based code

Client End:

char szString="Codeproject";
UINT nszLen=strlen(szString)+1;//Extra NULL character
send(hSendingSocket,szString,nszLen,0);

Server End

char szString[1024];
int nTotalBufferLen=1023;//one for NULL character

//recv data
int nRecv=recv(hRecvingSocket,szString,nTotalBufferLen,0);
  
//complete string
szString[nRecv]=NULL;

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Re: Socket Programming

Ravi Bhavnani12-Feb-05 5:11

Ravi Bhavnani

12-Feb-05 5:11

Dinesh, I recommend using CSocketFile and CArchive. They work beautifully! Cool | :cool:

/ravi

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Re: Socket Programming

Member 90098712-Feb-05 5:37

Member 900987

12-Feb-05 5:37

Thanks Ravi,
I will try this option.

Dinesh.

Re: Socket Programming

Mohammad A Gdeisat12-Feb-05 6:10

Mohammad A Gdeisat

12-Feb-05 6:10

Hi friend,

Maybe the problem is that, if you are using TCP/IP protocol, the structure is divided as multiple packets on the network, so you should first send the size of the structure (string + int), then use recv() and check that the number of bytes received are equal to the size of the structure before using the structure, or USE UDP/IP.

something like this:

<br />
int nRecv=0;<br />
<br />
while(nRecv<SizeOfExpectedData)<br />
    nRecv+=recv(....);

//now i am sure i received the whole message, not just few packets
//now use the structure

Mohammad Gdeisat

Re: Socket Programming

Member 90098716-Feb-05 18:04

Member 900987

16-Feb-05 18:04

Hi Mohammad,

Thanks for the help, I will try this option.

Regards,
Dinesh.

File Transfer

Member 172633411-Feb-05 19:59

Member 1726334

11-Feb-05 19:59

Hi All,

Has anyone of u developed a class which can Transfer a File across LAN.

I have a client Server Application which can Send and Receive messages between them. Now i want to implement the File Transfer.

Looking forward to ur valuable Suggestions..

Thanks.

Re: File Transfer

ThatsAlok11-Feb-05 22:30

ThatsAlok

11-Feb-05 22:30

Puttaa wrote:
Now i want to implement the File Transfer.

Hope you benifited with this article
http://www.codeproject.com/internet/SocketFileTransfer.asp[^]

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Re: File Transfer

Mohammad A Gdeisat12-Feb-05 6:15

Mohammad A Gdeisat

12-Feb-05 6:15

Hi
have you tried to use the API function defined in Winsock2.h:

BOOL TransmitFile( <br />
    SOCKET hSocket, 		//SOCKET used to transmit the file<br />
    HANDLE hFile, 		//handle to an open file<br />
    DWORD nNumberOfBytesToWrite, 	//Number of bytes to send from the file, 0= the whole file<br />
    DWORD nNumberOfBytesPerSend, 	// the send size to use for write operations<br />
    LPOVERLAPPED lpOverlapped, 		//Overlapped I/O parameters<br />
    LPTRANSMIT_FILE_BUFFERS lpTransmitBuffers,		//contains data to be sent before and after the file transfer.<br />
    DWORD dwFlags <br />
);

it will work faster than any implemented function or class, because it works in kernel mode rather than user mode.

Regards,
Mohammad Gdeisat

Re: File Transfer

ThatsAlok12-Feb-05 6:47

ThatsAlok

12-Feb-05 6:47

Mohammad A Gdeisat wrote:
BOOL TransmitFile(

Hello Mohammad , i never use the TransmitFile api, i just want to know TransmitFile is use to transmit file, from which api i will recv that File.

thanks

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Re: File Transfer

Mohammad A Gdeisat12-Feb-05 9:16

Mohammad A Gdeisat

12-Feb-05 9:16

hi,

I really have not used this function, but as a sense, i think that the other end should use recv() with a connected socket on appropriate IP and port number.

anyway, this is all i know about it. you can still search for examples on TransmitFile

Regards,
Mohammad Gdeisat

Problem with GDI+ in Visual C++ 6.0

uus9911-Feb-05 17:50

uus99

11-Feb-05 17:50

Hello there,
I'm using Visual C++ 6 with Platform SDK and trying to create a imaging program. The program is simple, where i the user can draw lines on a TIFF image.

I'm using GDI+ for this purpose, but having one problem. The problem is that GDI+ just cannot draw on gray(8-bit)/black & white TIFF images or BMP for that matter. I dont know why. A simple test code is given below,

void CGDIPlusDlg::OnButton8() <br />
{<br />
//gets current DC<br />
CDC *pDC=this->GetDC();<br />
//gets Handle to DC<br />
HDC hdc=pDC->GetSafeHdc();<br />
<br />
//Opens an image from disk<br />
Image img(L"c:\\mspaint.tif");<br />
//target rectangle at coordinate 0,0 sizwe<br />
RectF r(0, 0, 100, 100);<br />
<br />
//Set graphics, and dest<br />
Graphics gr(hdc);<br />
RectF destRect(0, 0, 100, 100);<br />
<br />
//Draw original image-works fine<br />
gr.DrawImage(&img,destRect);<br />
<br />
//Create a blackpen (A,b,g,r), thickness 3<br />
Pen blackPen(Color(255, 0, 0, 0), 3);<br />
<br />
//Start and end point<br />
PointF point1(0, 0);<br />
PointF point2(100.0f, 100.0f);<br />
<br />
//Draw line on image---doesnt work for BW images!!<br />
Graphics gr2(&img);<br />
gr2.DrawLine(&blackPen,point1,point2);<br />
<br />
RectF destRect2(100, 0, 100, 100);<br />
gr.DrawImage(&img,destRect2);<br />
}

The image is created using MSPaint. Create a 100x100 image, draw something, and save as TIF. Save again by changing the image depth to black & white from the Image->Attributes menu.

The program supposed to draw a diagonal line across the image, but it doest for the black&white version of tif.

So, my problem is how to overcome this? Or, how can i programmatically convert a BW TIFF to color and work on it using GDI+?

Oh yeah, can anyone try if this code works fine in C# or managed C++?

Thanks,
Usman

CFileDialog Issues

JKallen11-Feb-05 16:15

JKallen

11-Feb-05 16:15

I have inherited a class from CFileDialog.

OnTypeChange has been overridden with the purpose of changing the direcory when the user changes the filter list.

How do I actually change the current directory?

Re: CFileDialog Issues

Bob Ciora12-Feb-05 4:08

Bob Ciora

12-Feb-05 4:08

Use SetCurrentDirectory[^]. There is an equivalent GetCurrentDirectory[^] if you want to save and restore the original directory later.

Bob Ciora

SIMPLE: "x" in System menu

JKallen11-Feb-05 11:47

JKallen

11-Feb-05 11:47

What is the event message when the user clicks the x in the system menu.

Background:

I have disabled OnCancel() and OnOK() so that in my dialog-based app the esc and return keys don't close the app.

I have the OnFileExit (when user selects file exit) method calling EndDialog(IDOK) directly. What function is called when the user clicks on the x?

Long and short of it is I dont want keyboard commands (other than alt navigation) to close the app.

Re: SIMPLE: "x" in System menu

David Crow11-Feb-05 12:18

David Crow

11-Feb-05 12:18

JKallen wrote:
What function is called when the user clicks on the x?

Have you looked at OnClose()?

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