C / C++ / MFC Discussion Boards

aleyah31-Jan-02 3:59

31-Jan-02 3:59

Hello..
I want to know something! In Visual C++ also can use C code, but can or not C code in same project call C++ function??
like this, my C code is in what.c and I want to call function in loginDlg.C++, the function name is CLoginDLg...
i try do this in file what.c
CLoginDlg dlg;
dlg.DoModal();

but this error appear when i compile it
error C2065: 'CLoginDlg' : undeclared identifier
error C2146: syntax error : missing ';' before identifier 'dlg'
error C2065: 'dlg' : undeclared identifier
error C2224: left of '.DoModal' must have struct/union type
anybody can help me.. or i do wrong!!??

Re: C and Visual C++

Simon Walton31-Jan-02 4:43

Simon Walton

31-Jan-02 4:43

If you post some code perhaps we can help you. Smile | :)

Simon
C++: Only friends can see your private parts.
Sonork ID 100.10024

Re: C and Visual C++

aleyah31-Jan-02 4:59

aleyah

31-Jan-02 4:59

where to i post my code in this forum??

Re: C and Visual C++

Alvaro Mendez31-Jan-02 5:05

Alvaro Mendez

31-Jan-02 5:05

You can't call C++ code from C the way you're trying it. CLoginDlg is a class which C does not recognize.

What you can do is wrap that code inside a global "C"-style function inside your C++ file:

extern "C" void OpenLoginDlg()
{
   CLoginDlg dlg;
   dlg.DoModal();
}

Then you can call OpenLoginDlg in your C code.

Regards,
Alvaro

Re: C and Visual C++

aleyah31-Jan-02 5:20

aleyah

31-Jan-02 5:20

never mind for login dialog...
but i want you to solve this problem... because this i my main problem........

this is my C code
case IDC_OK:
database db; //this i call function from c++ file
db.Open(CRecordset::dynaset,"password);
while(!db.IsEOF())
{
if(db.m_userID == IDC_USER_NAME)
{
if(db.m_password == IDC_PASSWORD)
{
ShellExecute (NULL, "open", "d:\\games\\Same.exe",NULL,NULL,SW_SHOWNA);
exit(0);
}
else
{
AfxMessageBox("Incorrect password!");
m_word="";
UpdateData(false);
return;
}
}
loginConn.MoveNext();
}

but this error appear
error C2065: 'database' : undeclared identifier
error C2146: syntax error : missing ';' before identifier 'db'
error C2065: 'db' : undeclared identifier
error C2224: left of '.Open' must have struct/union typeerror C2065: 'CRecordset' : undeclared identifier
error C2143: syntax error : missing ')' before ':'

Re: C and Visual C++

aleyah31-Jan-02 5:38

aleyah

31-Jan-02 5:38

anyone can help me!!!!

Re: C and Visual C++

Joaquín M López Muñoz31-Jan-02 6:03

Joaquín M López Muñoz

31-Jan-02 6:03

Do not panic Smile | :)

Try this:

close all open files in your Visual Studio, delete your .c files from the project, go to the Windows Explorer, locate those files, change the extension to .cpp and add them back to the project. Now, hopefully, your formerly C modules are C++.
whenever you get some "undeclared identifier" compiler error, try to locate the .h header file for the class you're trying to use and insert the corresponding #include.

With a little luck, this will help you advance a little further.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: C and Visual C++

Not Active31-Jan-02 10:56

Not Active

31-Jan-02 10:56

Sounds like the best help for you would be to go back to school or re-read the books.

Re: C and Visual C++

aleyah31-Jan-02 6:02

aleyah

31-Jan-02 6:02

i do as you write...
but when i compile... it have this warning
want.c(1957) : warning C4013: 'OpenLoginDlg' undefined; assuming extern returning int

and i try to build exe... it appear Microsoft Visual C++ Debug Library... so what must i do now??

menu bar

aleyah31-Jan-02 3:46

aleyah

31-Jan-02 3:46

hi all;

I am writting an MFC app using the Doc/View and MDI. My problem is my additional menu bar was grayed and can not click but i dont set it as grayed. And the original menu bar was appear and can click on it. So how to solve this problem.

Re: menu bar

567890123431-Jan-02 4:03

5678901234

31-Jan-02 4:03

When you add new menu item to SDI/MDI MFC application it is disabled in run-time untill you write message handler for this item.

Re: menu bar

Joaquín M López Muñoz31-Jan-02 4:01

Joaquín M López Muñoz

31-Jan-02 4:01

Maybe it has to do with command update handlers. Have you ON_COMMAND_UPDATE_UI handlers for the new commands in the additional menu bar? (I'm asuming you already have ON_COMMAND handlers for them)

Also you might find interesting to have a look at the flag

<a href="http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vcmfc98/html/_mfc_cframewnd.3a3a.m_bautomenuenable.asp">CFrameWnd::m_bAutoMenuEnable</a>

, which gives you control over this kind of things.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: menu bar

aleyah31-Jan-02 4:56

aleyah

31-Jan-02 4:56

thanks...
it's work, but can you tell me how to appear the dialog box after we click the menu bar?????

Re: menu bar

Joaquín M López Muñoz31-Jan-02 5:03

Joaquín M López Muñoz

31-Jan-02 5:03

If I'm understanding your question, you should write something like this on your command handler:

CYourDialog dlg;
dlg.DoModal();

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: menu bar

aleyah31-Jan-02 5:09

aleyah

31-Jan-02 5:09

i do this

void CMainFrame::OnLogin()
{
login dlg;
dlg.DoModal();
}

but this error appear!!
error C2065: 'login' : undeclared identifier
error C2146: syntax error : missing ';' before identifier 'dlg'
error C2065: 'dlg' : undeclared identifier
error C2228: left of '.DoModal' must have class/struct/union type

Re: menu bar

Joaquín M López Muñoz31-Jan-02 5:19

Joaquín M López Muñoz

31-Jan-02 5:19

mmmh... What is that login? It is a CDialog class, right? Then in your project you'll see a .cpp and a .h (possibly login.h) files associated with the class. Include this line at the beggining of the file where the error is:

#include "login.h" // or whatever the header file for the class is named

You know, this is pretty basic C/C++ stuff. Maybe you should spend some time reading some C/C++ primer to get the fundamentals learnt. Do a search on Internet, there must be plenty of tutorials.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: menu bar

aleyah31-Jan-02 5:23

aleyah

31-Jan-02 5:23

thanks...
can you help me to solve my above problem... (c and visual c++)

Joaquín M López Muñoz LOOK HERE! (or anyone)

Rickard Andersson²⁰31-Jan-02 1:17

Rickard Andersson²⁰

31-Jan-02 1:17

I wrote:
I have download the remote control code here from CP and can't get it to work (any more)!!

The problem is that it can't connect to the server over the LAN!!
Another Winsock app works just fine and it uses CAsyncSocket class...

I know this should be impossible for you to say whats wrong without code example. But you perhaps know something that I don't know...

Joaquín M López Muñoz wrote:
The error is descriptive enough... seems like the server is not running properly. Try issuing a telnet your_server_ip port where port is the port number used by the app to determine whether the server is running or not.

Yes, I've done that and the Telnet client came up and was connected to the server... so... is my LAN not working properly?

Do you remember this message ?

------------------------------
©0d3 ©®4©k3® - That's me! Smile | :)

------------------------------

Re: Joaquín M López Muñoz LOOK HERE! (or anyone)

Joaquín M López Muñoz31-Jan-02 2:41

Joaquín M López Muñoz

31-Jan-02 2:41

You did a telnet aaa.bbb.ccc.ddd 5150? Please note the 5150, which is the TCP port used by the app (I peeked inside the code). A normal telnet is no useful test.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Joaquín M López Muñoz LOOK HERE! (or anyone)

Rickard Andersson²⁰31-Jan-02 3:18

Rickard Andersson²⁰

31-Jan-02 3:18

Wll, I've used 5729 instead of 5150 because I've read in the Winsock FAQ that 5150 was a reserved port number so I change but now when I changed back it works... weird...

Well well...

------------------------------
©0d3 ©®4©k3® - That's me! Smile | :)

------------------------------

Re: Joaquín M López Muñoz LOOK HERE! (or anyone)

Joaquín M López Muñoz31-Jan-02 3:22

Joaquín M López Muñoz

31-Jan-02 3:22

So it is working? Congrats man Smile | :)

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

CListCtrl Question

Paresh Solanki31-Jan-02 0:50

Paresh Solanki

31-Jan-02 0:50

How can I syncronise (..ize for you yanks) the column widths on two CListCtrl objects?

I have an app with two CList objects aligned vertically. I am already processing the OnNotify() to update the data in list2 depending on the selected row in list1.

When the column width is adjusted in list1, I would like list2 to update it's column to the same width. However I can't find the notification code in MSDN.

Any ideas?

Paresh Solanki
One Tequila Two Tequila Three Tequila Floor

Re: CListCtrl Question

Roger Allen31-Jan-02 1:35

Roger Allen

31-Jan-02 1:35

You have to handle the message NK_ENDTRACK, which is sent when a column has been re-sized. The header control can be a bit funny in NT and not send the message with the correct control id (it has it set to 0). Here is some code which I have used in the past:

// in your OnInitDialog etc
	m_Methods.GetHeaderCtrl()->SetDlgCtrlID(m_Methods.GetDlgCtrlID());	

void CSamplesFloat::OnEndtrackMethodList(NMHDR* pNMHDR, LRESULT* pResult) 
{
	//HD_NOTIFY *phdn = (HD_NOTIFY *) pNMHDR;
	// TODO: Add your control notification handler code here
	CHeaderCtrl* pHeaderCtrl = m_Methods.GetHeaderCtrl();
	if (pHeaderCtrl != NULL)
		{
		int  nColumnCount = pHeaderCtrl->GetItemCount();
		int	width ;
		for (int i = 0 ; i < nColumnCount ; i++)
			{
			width = m_Methods.GetColumnWidth(i) ;
			m_OtherCtrl.SetColumnWidth(i, width) ;
			}
		}
	*pResult = 0;
}

You just need to map the HDN_ENDTRACk for both list controls, and get one to size the columns of the other in each function.

Roger Allen
Sonork 100.10016

If I'm not breathing, I'm either dead or holding my breath.
A fool jabbers, while a wise man listens. But is he so wise to listen to the fool?

Re: CListCtrl Question

Paresh Solanki31-Jan-02 3:16

Paresh Solanki

31-Jan-02 3:16

Thanks Just what I needed

Paresh Solanki
One Tequila Two Tequila Three Tequila Floor

Unicode in combobox

Jon Schuringa31-Jan-02 0:38

Jon Schuringa

31-Jan-02 0:38

Hi,
I am reading unicode text from an Access database and want to put it in a combobox. The problem is that the text in the combobox appears to be plain ASCII. If I copy the text from the combobox and paste it into Word or so, I see the correct text again? Confused | :confused:

What should I do to get the unicode text displayed correctly, or is this "behavior by design"?

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