C / C++ / MFC

3-Jul-06 7:05

While trying to add a new dialog (for login), after I build the dialog resource and compile the new class, I get errors saying that the IDD_DIALOG1 can't be found, even though it is in the .h file. This is where the error message points back to (the .h file). Anyone know why this is reacting the way it is. This is the first version of Visual C++ 6.0.

Thanks.

John P.

Zac Howland3-Jul-06 7:10

3-Jul-06 7:10

Check to make sure that the IDD_DIALOG1 has a unique definition in your resource.h file.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Reagan Conservative3-Jul-06 8:20

3-Jul-06 8:20

The IDD_DIALOG1 is unique. Also the ID_EMPID and ID_EMPPIN, for the two text iput boxes also generate errors. This .EXE file was created by a third party and supposedly we can add new items to this workspace/project. Is there any kind of control that the original maker can add in Visual C++ that inhibits or prevents new items from being added?

Thanks for your input.

John P.

Zac Howland3-Jul-06 8:38

3-Jul-06 8:38

So, if I understand you correctly, you have the source code for a third party application and are adding a new resource (and corresponding classes) to it?

That being the case, then no, there is nothing they could do to make it so you cannot add a new resource.

What error are you getting exactly?

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Reagan Conservative3-Jul-06 9:56

3-Jul-06 9:56

For the IDD_DIALOG1, the compiler returns:

error C2065: undeclared identifier

error C2057: expected constant expression

Even though the IDD_DIALOG1 is in the .h file as:

//{{AFX_DATA (CloginDialog)
enum { IDD_DIALOG1 };
CString m_empIDnum;
CString m_empPIN;
//}}AFX_DATA

I also get errors saying that the two CString variables above are "undefined"

This just doesn't make sense since Visual C++ made them part of the code.

Thanks, Zac.

John P.

Zac Howland3-Jul-06 12:29

3-Jul-06 12:29

Typically, the ClassWizard will inject the following when creating a new class:

//{{AFX_DATA (CloginDialog)
enum { IDD = IDD_DIALOG1 };
CString m_empIDnum;
CString m_empPIN;
//}}AFX_DATA

Is your class name lowercased like that? Usually you see "CLoginDialog". Chances are it is a typo along those lines somewhere.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

zeus_master3-Jul-06 15:42

zeus_master

3-Jul-06 15:42

have you add the #include "resource.h" in you application?
in fact, these resource are defined in resource.h.

Reagan Conservative5-Jul-06 5:40

5-Jul-06 5:40

To all three of you who suggested that I add the resource.h file ---- THANKS.

What can I say but DUH!! Sometimes it's too obvious??

Thanks again!

John P.

dongqin3-Jul-06 18:41

dongqin

3-Jul-06 18:41

#include "resource.h"

hello

Searching for files based on regular exp.

MANISH RASTOGI3-Jul-06 19:52

MANISH RASTOGI

3-Jul-06 19:52

#include "resource.h" before the class declaration.

MANISH RASTOGI

chandrasombhotla3-Jul-06 4:17

chandrasombhotla

3-Jul-06 4:17

hi all,

can any one provide any info about searching for files using regular expressions.
something like [a-z]+[0-9].[a-z][0-9].

please provide links to any white papers or articles.

thanks,
sombhotla.

c++.net and vc6 atl

yoti113-Jul-06 4:00

yoti11

3-Jul-06 4:00

Hello,

How can I use com written in vc6 from c++.net managed code?

Thanks,

basic string question

sach!!3-Jul-06 3:59

sach!!

3-Jul-06 3:59

Hi!

I have a function which returning me LPCST i.e char*.

I want this value to be stored in array of 255 chars decleared as :

char Arr[255];

how can i do this ??

Thx in advance

Cedric Moonen3-Jul-06 4:02

Cedric Moonen

3-Jul-06 4:02

Returning a char array this way is tricky. Either you have to allocate the memory inside the function and free it outside (which is very ugly), or you can pass the pointer as a parameter of the function and manipulate its content. Anyway, it is much better to use the std::string (from the Standard Template Library) for which you don't need to care about memory usage.

Cédric Moonen
Software developer

Charting control

C^hris L^osinger3-Jul-06 4:02

C^hris L^osinger

3-Jul-06 4:02

strncpy(Arr, lpcstr, 255);
Arr[254] = 0; // just to be safe

Cleek | Image Toolkits | Thumbnail maker

Zac Howland3-Jul-06 6:37

3-Jul-06 6:37

If you can modify the function (that is, you control it), you can make the return value part of the function arguments:

void getMyString(char[255]& retString)
{
   memset(retString, 0, 255);
   // do stuff here
   // declare and initialize srcString somewhere
   strncpy(retString, srcString, 254);
}

If you don't have access, or are not allowed to change the interface, here are some alternatives:

char buffer[255] = {0};
strncpy(buffer, myFunction(), 254);

std::string myString = myFunction();

Note that both of those can be sketchy if the returning function is allocating memory on the heap and expecting you to handle cleanup (very poor design, but not too uncommon, sadly). Just keep that in mind when dealing with this kind of thing.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Roland Pibinger3-Jul-06 9:01

Roland Pibinger

3-Jul-06 9:01

Zac Howland wrote:
void getMyString(char[255]& retString)

That won't work.

Zac Howland3-Jul-06 9:12