C / C++ / MFC

_AnsHUMAN_ 23-Jul-06 18:19

_AnsHUMAN_

23-Jul-06 18:19

Thanhnamdo wrote
accept this value from an other Dialog of an other class

If you want to pass value from one dialog to another you can access the parent dialog's variables by
CMain* pMain=(CMain*)GetParent();
Then use this pointer to call member functions / change or alter variables of the first (parent) dialog.
Another way is to pass a pointer from one class to another.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Hamid_RT23-Jul-06 18:53

Hamid_RT

23-Jul-06 18:53

Whats application type if you have two dialog you can use
CMain m_Main=(CMain*)GetParent();and in another application you can use m_Main->(your variable)or(your function)and include header from Main class in another class

whitesky

Thanhnamdo23-Jul-06 18:58

Thanhnamdo

23-Jul-06 18:58

Thank you everybody .I understanded and I'm trying to do it.

_AnsHUMAN_ 23-Jul-06 18:59

_AnsHUMAN_

23-Jul-06 18:59

WhiteSky wrote
CMain m_Main=(CMain*)GetParent();

A missing *
Should be CMain* m_Main=(CMain*)GetParent();

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Hamid_RT23-Jul-06 19:20

Hamid_RT

23-Jul-06 19:20

yeah

whitesky

Help me !

Thanhnamdo23-Jul-06 17:34

Thanhnamdo

23-Jul-06 17:34

I'm a beginer. I use Tree Control in Dialog start and I stored Message TVN_SELCHANGED in a value and I want to accept this value from an other Dialog of an other class .But I don't known how to work .
Plesea help me!
Thanks! Confused | :confused:

using fprintf() to store data into a file

Hamid_RT27-Jul-06 7:13

Hamid_RT

27-Jul-06 7:13

You want to post this message from another dialog

WhiteSky

SUGGESTION FOR PROJECT

With_problem23-Jul-06 17:34

With_problem

23-Jul-06 17:34

I have project..in which i have to add all the Api function and access the data from server and store in my database...
Steps i have followed till now r:

NEW->PROJECT->MFC AppWizard (exe)->Dialog based
In dialog based application :NEXT
PROJECT->ADD TO PROJECT->COMPONENTS AND CONTROLS->GALLARY->REGISTERED ACTIVE-X COMPONENTS->ARIEL API CONTROLS->THEN IN DIALOG BOX I GOT THE INFORMATION ABOUT
1. CLASS NAME AAPI
2. BASE CALSS CWND
3.HEADER FILE AAPI.H
4.IMPIMENTATION FILE AAPI.CPP

IN .CPP FILE ALL THE FUNCTIONS EXAMPLE:

CString CArielAPI::GetServerAddress(LPCTSTR SessionId)
{
CString result;
static BYTE parms[] =VTS_BSTR;
InvokeHelper(0x15, DISPATCH_METHOD, VT_BSTR, (void*)&result, parms, SessionId);
return result;
}

CString CArielAPI::Login(LPCTSTR UserName, LPCTSTR Password, LPCTSTR UserId)

{
//username = wwtest2;
//Password = RD9234;
//Userid = wwtest2;

CString result;
static BYTE parms[] =VTS_BSTR VTS_BSTR VTS_BSTR;

InvokeHelper(0x2, DISPATCH_METHOD, VT_BSTR, (void*)&result, parms,UserName, Password, UserId);
return result;
}

I NEED YOUR SUGGESTION FOR MY PROJECT DO I AM IN THE RIGHT WAY.IS IT OK WORKING WITH DIALOG BASED APPLICATION OR I HAVE TO WORK WITH SOME OTHER ENVIRONMENT...AFTER ACCEPTING DATA DISPLAY THE CURRENT RATE FOR TODAY IN THE TEXT FILE...

cAN U GIVE ME ANY USEFUL SUGGESTION TO PROCEED FURTHER...PLEASE..IF U NEED ANY DETAIL PLS MAIL ME THROUGH THIS FOURM
THANKS IN ADVANCE

kitty523-Jul-06 17:12

kitty5

23-Jul-06 17:12

I have:
ULONG *buffer = NULL;
I do:

<br />
buffer = new ULONG[10000];<br />
... create a file, etc.<br />
fprintf( fpwrite, buffer );<br />
...<br />
delete [] buffer;<br />

the problem is:
fprintf(FILE *fptr, const char* cptr).
so, fprintf doesn't take a ULONG pointer as a parameter.

would it be safe for me to:
fprintf( fpwrite, (char *) buffer );
Will I lose data by doing this?
size of char is only 1 byte and size of ULONG is 4 bytes in my system...

Also, how can one limit the size of a file being created and appended?

Thanks.

Kitty5

Naveen23-Jul-06 17:19

23-Jul-06 17:19

Why don't u use fwrite(. It can satisfy all the above requirments.

nave

kitty523-Jul-06 17:33

kitty5

23-Jul-06 17:33

would i do:

<br />
FILE *filename;<br />
ULONG *buffer = NULL;<br />
buffer = new ULONG [10000];<br />
...<br />
fwrite(buffer, sizeof(ULONG), 10000, fileName);<br />
...<br />
delete [] buffer;<br />

Thanks.

Kitty5

Naveen23-Jul-06 17:41

23-Jul-06 17:41

yes..

nave

Re: using fprintf() to store data into a file [modified]

bob1697223-Jul-06 17:40

bob16972

23-Jul-06 17:40

This sounds like a homework assignment.

We don't do homework

kitty524-Jul-06 2:54

kitty5

24-Jul-06 2:54

Actually no... Thanks though.
I've been out of school for quite sometime.
I'm just clearing things up since some of these functions I've never used.

Just because other ppl are more adept at programming doesn't mean the the ones that are teaching themselves to be better at it should be penalized or scoffed at.

thanks for your help though.

Kitty5

-- modified at 8:55 Monday 24th July, 2006

David Crow24-Jul-06 3:46

David Crow

24-Jul-06 3:46

bob16972 wrote:
This sounds like a homework assignment.

Not even remotely.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

unresolved external symbol

David Crow24-Jul-06 3:43

David Crow

24-Jul-06 3:43

kitty5 wrote:
fprintf( fpwrite, buffer );

Should be:

fprintf( fpwrite, "%lu", buffer[0]);
fprintf( fpwrite, "%lu", buffer[1]);
...

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

thathvamsi23-Jul-06 16:43

23-Jul-06 16:43

Hi all,
Iam trying to read and write to USB device.
I get an error message
error LNK2001: unresolved external symbol "public: enum FT_STATUS __thiscall CUSBtestDlg::GetStatus(unsigned long *,unsigned long *,unsigned long *)" (?GetStatus@CUSBtestDlg@@QAE?AW4FT_STATUS@@PAK00@Z)
Release/USBtest.exe : fatal error LNK1120: 1 unresolved externals

I tried debugging but in vain.
Can anyone help/ any ideas?

Re: unresolved external symbol [modified]

John M. Drescher23-Jul-06 17:12

John M. Drescher

23-Jul-06 17:12

You need to see why the implementation of CUSBtestDlg::GetStatus(unsigned long *,unsigned long *,unsigned long *) is not in any of your cpp or header files that are included in your project. Have you added all the cpp files in your source folder to the project??

John

thathvamsi23-Jul-06 17:40

23-Jul-06 17:40

Hi John n Naveen,
Thanks for the response.
In the header file I do,

protected:<br />
typedef FT_STATUS (WINAPI *PtrToGetStatus)(FT_HANDLE, LPDWORD, LPDWORD, LPDWORD);<br />
	PtrToGetStatus m_pGetStatus;<br />
	FT_STATUS GetStatus(LPDWORD, LPDWORD, LPDWORD);<br />

in the cpp file, I do

int CUSBtestDlg::Buf_Read(void)<br />
{<br />
DWORD dRxBytes;<br />
	DWORD dTxBytes;<br />
	<br />
	DWORD dEventStatus;<br />
<br />
GetStatus(&dRxBytes,&dTxBytes,&dEventStatus);<br />
}

I get the error message that i mentioned before for this.

But I do the FT_STATUS FT_Read() also in the similar way and that works.

Any sugestion.?

-- modified at 23:41 Sunday 23rd July, 2006

Naveen23-Jul-06 18:02

23-Jul-06 18:02

but where is the definition of the funtion GetStatus(..)?

nave

thathvamsi23-Jul-06 18:14

23-Jul-06 18:14

FT_GetStatus is the FTD2XX_API library funciton.

This is given in the header file ftd2xx.h which is included in the USBtestdlg.h file.

Naveen23-Jul-06 18:18

23-Jul-06 18:18

hoo...So have include the lib file for that api in the project?

nave

thathvamsi23-Jul-06 18:33

23-Jul-06 18:33

have included the ftd2xx.h file as external dependency in the project. so the drivers installed should take care of linking the functions and reading and writing from the device(USB).
I can use their FT_Read and FT_Write functions without any errors.
Infact I have done the same way for GetStatus too.

Naveen23-Jul-06 18:56

23-Jul-06 18:56

u have to include the lib file for the same.

take menu project->Settings

in the link tab, there will be an edit box called object/library modules. Give the name of the lib file there and rebuild the project.

nave

thathvamsi23-Jul-06 20:11