C / C++ / MFC Discussion Boards

Re: Problem with SHFormatDrive ()

kakan22-Feb-06 3:59

kakan

22-Feb-06 3:59

Sorry, I misunderstood your post. Blush | :O

help me!

mojo198622-Feb-06 2:16

mojo1986

22-Feb-06 2:16

hi, im a mechanical engineering student and i've been given the task of calculating the second moment of area of three beams with different cross-sectional areas using the trapezium rule on c++ . i need the program to ask the user which cross-sectional area they want to calculate the SMOA for and use the corresponding data. the problem for me arises with the data for the heights and widths to be used as these are stored in txt files. the txt files contain a list of numbers: a single floating pt for the width, an integer, n, for the number of steps taken...which corresponds to the set of floating points which follow describing the height of the beam at these n points. i think i have to use an array to open and use the values, but one of the files has 20 values where the other two only have 10,(i.e.n=10 for two and n=20 for one) does anyone have any helpful hints for me? it would be very much appreciated!
thanks again

jo

-- modified at 11:14 Wednesday 22nd February, 2006

Re: help me!

David Crow22-Feb-06 3:03

David Crow

22-Feb-06 3:03

So your "width" text file has 20 values in it, and the "height" text file has 10 values in it. Is that correct? How about something like:

FILE *pFileHeight = fopen("height.txt", "r");
int  nHeight[10],
     x = 0;
while (! feof(pFileHeight))
{
    fscanf("%d", &nHeight[x]);  
    x++;
}
fclose(pFileHeight);

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

[Message Deleted]

Deviantizh22-Feb-06 2:10

Deviantizh

22-Feb-06 2:10

[Message Deleted]

Re: Getting CMainFrame in CDoc

Russell^'22-Feb-06 2:15

Russell^'

22-Feb-06 2:15

You can use the macro

AfxGetMainWnd()

Have a nice code day Wink | ;)

Dll

J512198222-Feb-06 1:20

J5121982

22-Feb-06 1:20

what are the lanuages that support dll?

JAYARAJ

Re: Dll

mehrdadov22-Feb-06 1:38

mehrdadov

22-Feb-06 1:38

Hi Almost all languages in windows suport dll.
what do you do?

Agh

Re: Dll

ThatsAlok22-Feb-06 2:47

ThatsAlok

22-Feb-06 2:47

mehrdadov wrote:
Almost all languages in windows suport dll.

What about Basic, Pascal and COBOL Smile | :)

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

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Dll

Prabu.22-Feb-06 3:37

Prabu.

22-Feb-06 3:37

Hi,

Those all are having only header files, obj files, lib files, etc. I think those languanges are not supported library files[Dll's].

If any one given the information regarding this I appreciate it. Rose | [Rose]

Re: Dll

Divyang Mithaiwala22-Feb-06 3:40

Divyang Mithaiwala

22-Feb-06 3:40

Hello Alok,

Do you know delphi & VB support dll. & delphi is visual pascal. same for Basic.

Regards,
Diyang Mithaiwala.

Re: Dll

ThatsAlok22-Feb-06 3:49

ThatsAlok

22-Feb-06 3:49

Divyang Mithaiwala wrote:
Do you know delphi & VB support dll. & delphi is visual pascal. same for Basic.

Sorry to be sound rude, Did I Mention Visual with Basic and Visual With Pascal..also i mention about COBOL.. isn't you find any Visual COBOL for same?

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

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Dll

ThatsAlok22-Feb-06 2:45

ThatsAlok

22-Feb-06 2:45

J5121982 wrote:
what are the lanuages that support dll?

Languages.. are you talking about Computer Lanaguage supporting DLL .. or DLl Supporting multiple lanaguage

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

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

passing pointer in thunking

indra2022-Feb-06 1:12

indra20

22-Feb-06 1:12

Hi,

I have defined a call back:
typedef int (*GETHSPATTERNPPROC) (TCHAR **&, long&);
I am then loading the library:
DWORD hModSP = lpfnLoadLibraryEx32W("MyDLL", NULL, 0);
Getting the function pointer:
GETHSPATTERNPPROC hGetHSPatterns = (GETHSPATTERNPPROC)GetProcAddress32W(hModSP, "GetHSPatterns");
Then calling the method:
pchHSPaternNames = NULL;
lNumPaterns = 0;
CallProcEx32W(2, 1, (DWORD)hGetHSPatterns, (TCHAR FAR **)pchHSPaternNames, (DWORD)lNumPatterns);

In "MyDLL" I am doing:
lNumPatterns = GetPatNum();
pchHSPaternNames = new TCHAR* [lNumPatterns];
and here it fails.

What is going wrong????

Re: passing pointer in thunking

toxcct22-Feb-06 1:54

toxcct

22-Feb-06 1:54

getting any error description ?

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.24][3.0 soon...]

Re: passing pointer in thunking

indra2022-Feb-06 2:34

indra20

22-Feb-06 2:34

I am running the application in 98, there it's showing the rundll32 error dialog and stopping,

Re: passing pointer in thunking

toxcct22-Feb-06 2:39

toxcct

22-Feb-06 2:39

indra20 wrote:
DWORD hModSP = lpfnLoadLibraryEx32W("MyDLL", NULL, 0);

GETHSPATTERNPPROC hGetHSPatterns = (GETHSPATTERNPPROC)GetProcAddress32W(hModSP, "GetHSPatterns");

before using parameters like you do, ensure it is not null...

DWORD hModSP = lpfnLoadLibraryEx32W("MyDLL", NULL, 0);
 
if (!hModSP) {
    GETHSPATTERNPPROC hGetHSPatterns = (GETHSPATTERNPPROC)GetProcAddress32W(hModSP, "GetHSPatterns");
    if (!hGetHSPatterns) {
        //...
    }
}

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.24][3.0 soon...]

-- modified at 8:39 Wednesday 22nd February, 2006

Re: passing pointer in thunking

indra2022-Feb-06 2:56

indra20

22-Feb-06 2:56

thanks for the reply, yes i am having those checks in my code.
What I think is that the pointer TCHAR** pchHSPaternNames is not been passed correctly. Could you please confirm on that??

abt CList

namaskaaram21-Feb-06 23:57

namaskaaram

21-Feb-06 23:57

consider a class say 'ABC'

i want to create a list holding only the ABC pointer locations
then is the below the correct way of declaring it :
CList<ABC*,ABC*> x;

one more question:
if i were to declare it as
CList<ABC,ABC*> y;

,then how is the second different from the first delclaration? Confused | :confused:

-- modified at 5:58 Wednesday 22nd February, 2006

Re: abt CList

Maximilien22-Feb-06 0:58

Maximilien

22-Feb-06 0:58

I don't know, and the MFC collections are confusing to use.

I think the first one is the only valid.

if you really have to guess about a declaration with MFC collections, then change to STL

std::list<abc> /// a list of ABC
or
std::list<abc*> /// a list of ABC*

it's much more clear.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: abt CList

David Crow22-Feb-06 3:15

David Crow

22-Feb-06 3:15

namaskaaram wrote:
then is the below the correct way of declaring it :
CList<abc*,abc*> x;

That is one correct way, but certainly not the only way.

For the former:

ABC *a = new ABC(), *b;
x.AddHead(a);     // to store
POSITION pos = x.GetHeadPosition();
b = x.GetAt(pos); // to retrieve

For the latter:

ABC a, *b;
x.AddHead(a);     // to store
POSITION pos = x.GetHeadPosition();
b = x.GetAt(pos); // to retrieve

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

Re: abt CList

namaskaaram22-Feb-06 17:04

namaskaaram

22-Feb-06 17:04

that means the former Clist stores "the pointer locations"(and returns the pointer value) whereas the latter Clist stores the object itself(and returns the pointer of the object stored in the CList)!...is it? Confused | :confused:

Re: abt CList

David Crow23-Feb-06 2:20

David Crow

23-Feb-06 2:20

Correct.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

Re: abt CList

namaskaaram24-Feb-06 0:45

namaskaaram

24-Feb-06 0:45

thank u sir!!!!!

CHttpConnection

murali_utr21-Feb-06 23:12

murali_utr

21-Feb-06 23:12

Hi,
my program is used to submit values to asp page using post method. but the submitted values are send to server. while check with asp script. i cann't get the values submiited in the program. any one help me out.

pServer = session.GetHttpConnection(CStrDomain,nPort);
pFile = pServer->OpenRequest(CHttpConnection::HTTP_VERB_POST,CStrSuburl,Referer,1,NULL,"HTTP/1.0",dwHttpRequestFlags);
pFile->AddRequestHeaders(szHeaders);
pFile->SendRequest(NULL,0,(void*)(const char*)CStrTempQueryString.GetBuffer(CStrTempQueryString.GetLength()) ,CStrTempQueryString.GetLength());

urgent. thanks in advance.

Have A Nice Day!
Murali.M

lib file location

Chintoo72321-Feb-06 21:56

Chintoo723

21-Feb-06 21:56

I am usnig Visual Studio 6, to build a DLL. I want to change the target location where the .lib is generated, and I am unable to figure out what setting to change. Does anyone know?

thanks!

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