Re: Linking error! - C / C++ / MFC Discussion Boards

Dhiraj kumar Saini31-Aug-08 19:19

31-Aug-08 19:19

Yes i have declared it in the header file of CGetFoorDlg since this function is a contrucotr.
I have declared two contructors:

CGetFootDlg(CWnd* pParent = NULL);
and
CGetFootDlg(bool bMainDlg, CWnd* pParent = NULL);

Re: Linking error!

Naveen31-Aug-08 19:25

Naveen

31-Aug-08 19:25

Dhiraj kumar Saini wrote:
CGetFootDlg(CWnd* pParent = NULL);

The above function dosent have the implimentation in cpp right. In the CPP you have only written implementation for CGetFootDlg(bool bMainDlg, CWnd* pParent = NULL);. So remove the first constructor from the header.

After this if you compile, you will get error from the constructor if CMainDlg. Because from that constructor, you are trying to call CGetFootDlg(CWnd* pParent);. But while linking, the compiler couldn't find the implementation. That why it gave out link error.

Modify the CMainDlg constructor to call the CGetFootDlg(bool bMainDlg, CWnd* pParent = NULL); constructor instead of CGetFootDlg(CWnd* pParent = NULL);

nave

[OpenedFileFinder]

Re: Linking error!

Dhiraj kumar Saini31-Aug-08 19:34

Dhiraj kumar Saini

31-Aug-08 19:34

Hi ,

But in CMainDlg Constructor I am not calling CGetFootDlg.

Can u just explain it more

Re: Linking error!

Naveen31-Aug-08 19:37

Naveen

31-Aug-08 19:37

May be you have member variable of CGetFootDlg in CMainDlg.. isnt it?

nave

[OpenedFileFinder]

Re: Linking error!

Dhiraj kumar Saini31-Aug-08 19:43

Dhiraj kumar Saini

31-Aug-08 19:43

Yes u r right!

So what to do?

Re: Linking error!

Naveen31-Aug-08 19:50

Naveen

31-Aug-08 19:50

You can use the initialisation list of CMainDlg. That is if your current CMainDlg constructor is as follows

CMainDlg::CMainDlg( CWnd* pParent )
: CDialog(CMainDlg::IDD, pParent)

Modify it as

CMainDlg::CMainDlg( CWnd* pParent )
: CDialog(CMainDlg::IDD, pParent),
m_FootDlg( true, this )

Where m_FootDlg is the member variable of class CGetFootDlg.

nave

[OpenedFileFinder]

Re: Linking error!

Dhiraj kumar Saini31-Aug-08 20:00

Dhiraj kumar Saini

31-Aug-08 20:00

Actually CMainDlg is My Main DialogBox Class On which by default i am placing a new dialog box

CVisitorDtlsDlg and its memeber variable it CMainDlg is m_dlgVisitorDetails.
the contructor i have defined for CMainDlg is as follows:

CMainDlg::CMainDlg(CWnd* pParent /*=NULL*/)
: CDialog(CMainDlg::IDD, pParent),m_dlgVisitorDetails(true,this)
{
//{{AFX_DATA_INIT(CMainDlg)
// NOTE: the ClassWizard will add member initialization here
//}}AFX_DATA_INIT
m_nTimer = 0;
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

Now what i want is if I click the button on CgetFootDlg which is there on the CmainDlg as a button control then in Place of CVisitorDtlsDlg dialog box i need to open a new DialogBox CGetFootDlg which have certain controls.

Again if I click ViewDetails button control which is placed on CMainDlg the Dialogbox CGetFootDlg
shoulb be replaced by CVisitorDtlsDlg .

Please tell how to imlement the CMainDlg Constructor for both the Dialog Boxes that are as a control on the CMainDlg but visible only one at a time.

Frown | :(

Re: Linking error!

Naveen31-Aug-08 20:31

Naveen

31-Aug-08 20:31

The link error can be fixed by modifying the code as follows..

CMainDlg::CMainDlg(CWnd* pParent /*=NULL*/)
: CDialog(CMainDlg::IDD, pParent),m_dlgVisitorDetails(true,this),
  m_FootDlg( true, this )

Dhiraj kumar Saini wrote:
Please tell how to imlement the CMainDlg Constructor for both the Dialog Boxes that are as a control on the CMainDlg but visible only one at a time.

The constructor have nothing to do with the visiblity of the dialog. If you want to know whether the other dialog is visible or not, you can the IsWindowVisible() function.

nave

[OpenedFileFinder]

Re: Linking error!

Dhiraj kumar Saini31-Aug-08 20:41

Dhiraj kumar Saini

31-Aug-08 20:41

Still it is giving the error as

Error 27 error LNK2019: unresolved external symbol "public: __thiscall CGetFootDlg::CGetFootDlg(bool,class CWnd *)" (??0CGetFootDlg@@QAE@_NPAVCWnd@@@Z) referenced in function "public: __thiscall CMainDlg::CMainDlg(class CWnd *)" (??0CMainDlg@@QAE@PAVCWnd@@@Z) MainDlg.obj

I have made the constructor of CmainDlg as

CMainDlg::CMainDlg(CWnd* pParent /*=NULL*/)
: CDialog(CMainDlg::IDD, pParent),m_dlgVisitorDetails(true,this),
m_dlgGetFootPrint(true,this)
{
//{{AFX_DATA_INIT(CMainDlg)
// NOTE: the ClassWizard will add member initialization here
//}}AFX_DATA_INIT
m_nTimer = 0;
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

Re: Linking error!

Naveen31-Aug-08 20:44

Naveen

31-Aug-08 20:44

have you added the cpp file of CGetFootDlg to the project files( you can check this from the file view tab->Source files ). If it is not added to the projet add it.

nave

[OpenedFileFinder]

Re: Linking error!

Dhiraj kumar Saini31-Aug-08 20:52

Dhiraj kumar Saini

31-Aug-08 20:52

Yes I have added the cpp file Frown | :(

Re: Linking error!

Dhiraj kumar Saini31-Aug-08 20:25

Dhiraj kumar Saini

31-Aug-08 20:25

Please help me as u have understood my problem

Customizing a title bar (mfc and/or windows forms applications)

James_Zhang31-Aug-08 17:38

James_Zhang

31-Aug-08 17:38

how do you customize the title bar for applications? i'd like to know how to do this for either: a windows forms application or MFC application (using visual studio 2008). the windows forms application can be in either visual basic or c++. Specifically, i want to customize the buttons for the application (minimize, maximize, and close). Thanks for help in advance.

Re: Customizing a title bar (mfc and/or windows forms applications)

Hamid_RT31-Aug-08 18:13

Hamid_RT

31-Aug-08 18:13

See A Technique to Customize the Title Bar of Windows
[^].

Re: Customizing a title bar (mfc and/or windows forms applications)

James_Zhang1-Sep-08 8:40

James_Zhang

1-Sep-08 8:40

Is that for mfc or atl? Confused | :confused:

Re: Customizing a title bar (mfc and/or windows forms applications)

Hamid_RT1-Sep-08 22:46

Hamid_RT

1-Sep-08 22:46

No it was wtl but not problem see Custom Captions (including multi-line captions)[^] and A Gradient Title Bar for modal and modeless dialog[^]. Big Grin | :-D

Problem using WMI

lhkok31-Aug-08 17:29

lhkok

31-Aug-08 17:29

HI all,

I am quite new to C++. Recently, I am working on a project that requires me to get the processorId from computers. After a quick search on the internet, I found that WMI is the what I need. Subsequently, I get the following code from MSDN (http://msdn.microsoft.com/en-us/library/aa390423(VS.85).aspx):

#define _WIN32_DCOM
#include <iostream>
using namespace std;
#include <comdef.h>
#include <wbemidl.h>

# pragma comment(lib, "wbemuuid.lib")

int main(int argc, char **argv)
{
    HRESULT hres;

    // Step 1: --------------------------------------------------
    // Initialize COM. ------------------------------------------

    hres =  CoInitializeEx(0, COINIT_MULTITHREADED); 
    if (FAILED(hres))
    {
        cout << "Failed to initialize COM library. Error code = 0x" 
            << hex << hres << endl;
        return 1;                  // Program has failed.
    }

    // Step 2: --------------------------------------------------
    // Set general COM security levels --------------------------
    // Note: If you are using Windows 2000, you need to specify -
    // the default authentication credentials for a user by using
    // a SOLE_AUTHENTICATION_LIST structure in the pAuthList ----
    // parameter of CoInitializeSecurity ------------------------

    hres =  CoInitializeSecurity(
        NULL, 
        -1,                          // COM authentication
        NULL,                        // Authentication services
        NULL,                        // Reserved
        RPC_C_AUTHN_LEVEL_DEFAULT,   // Default authentication 
        RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation  
        NULL,                        // Authentication info
        EOAC_NONE,                   // Additional capabilities 
        NULL                         // Reserved
        );

                      
    if (FAILED(hres))
    {
        cout << "Failed to initialize security. Error code = 0x" 
            << hex << hres << endl;
        CoUninitialize();
        return 1;                    // Program has failed.
    }
    
    // Step 3: ---------------------------------------------------
    // Obtain the initial locator to WMI -------------------------

    IWbemLocator *pLoc = NULL;

    hres = CoCreateInstance(
        CLSID_WbemLocator,             
        0, 
        CLSCTX_INPROC_SERVER, 
        IID_IWbemLocator, (LPVOID *) &pLoc);
 
    if (FAILED(hres))
    {
        cout << "Failed to create IWbemLocator object."
            << " Err code = 0x"
            << hex << hres << endl;
        CoUninitialize();
        return 1;                 // Program has failed.
    }

    // Step 4: -----------------------------------------------------
    // Connect to WMI through the IWbemLocator::ConnectServer method

    IWbemServices *pSvc = NULL;
	
    // Connect to the root\cimv2 namespace with
    // the current user and obtain pointer pSvc
    // to make IWbemServices calls.
    hres = pLoc->ConnectServer(
         _bstr_t(L"ROOT\\CIMV2"), // Object path of WMI namespace
         NULL,                    // User name. NULL = current user
         NULL,                    // User password. NULL = current
         0,                       // Locale. NULL indicates current
         NULL,                    // Security flags.
         0,                       // Authority (e.g. Kerberos)
         0,                       // Context object 
         &pSvc                    // pointer to IWbemServices proxy
         );
    
    if (FAILED(hres))
    {
        cout << "Could not connect. Error code = 0x" 
             << hex << hres << endl;
        pLoc->Release();     
        CoUninitialize();
        return 1;                // Program has failed.
    }

    cout << "Connected to ROOT\\CIMV2 WMI namespace" << endl;


    // Step 5: --------------------------------------------------
    // Set security levels on the proxy -------------------------

    hres = CoSetProxyBlanket(
       pSvc,                        // Indicates the proxy to set
       RPC_C_AUTHN_WINNT,           // RPC_C_AUTHN_xxx
       RPC_C_AUTHZ_NONE,            // RPC_C_AUTHZ_xxx
       NULL,                        // Server principal name 
       RPC_C_AUTHN_LEVEL_CALL,      // RPC_C_AUTHN_LEVEL_xxx 
       RPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxx
       NULL,                        // client identity
       EOAC_NONE                    // proxy capabilities 
    );

    if (FAILED(hres))
    {
        cout << "Could not set proxy blanket. Error code = 0x" 
            << hex << hres << endl;
        pSvc->Release();
        pLoc->Release();     
        CoUninitialize();
        return 1;               // Program has failed.
    }

    // Step 6: --------------------------------------------------
    // Use the IWbemServices pointer to make requests of WMI ----

    // For example, get the name of the operating system
    IEnumWbemClassObject* pEnumerator = NULL;
    hres = pSvc->ExecQuery(
        bstr_t("WQL"), 
        bstr_t("SELECT * FROM Win32_OperatingSystem"),
        WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, 
        NULL,
        &pEnumerator);
    
    if (FAILED(hres))
    {
        cout << "Query for operating system name failed."
            << " Error code = 0x" 
            << hex << hres << endl;
        pSvc->Release();
        pLoc->Release();
        CoUninitialize();
        return 1;               // Program has failed.
    }

    // Step 7: -------------------------------------------------
    // Get the data from the query in step 6 -------------------
 
    IWbemClassObject *pclsObj;
    ULONG uReturn = 0;
   
    while (pEnumerator)
    {
        HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1, 
            &pclsObj, &uReturn);

        if(0 == uReturn)
        {
            break;
        }

        VARIANT vtProp;

        // Get the value of the Name property
        hr = pclsObj->Get(L"Name", 0, &vtProp, 0, 0);
        wcout << " OS Name : " << vtProp.bstrVal << endl;
        VariantClear(&vtProp);
    }

    // Cleanup
    // ========
    
    pSvc->Release();
    pLoc->Release();
    pEnumerator->Release();
    pclsObj->Release();
    CoUninitialize();

    return 0;   // Program successfully completed.
	
}</wbemidl.h></comdef.h></iostream>

I added ->#include "stdafx.h"<->
I get the following Error:
fatal error C1083: Cannot open include file: 'Wbemidl.h': No such file or directory

I search my computer and found that the header file is located at C:\PROGRAM FILES\MICROSOFT SDKS\WINDOWS\V6.0A\INCLUDE.
I then included the path C:\PROGRAM FILES\MICROSOFT SDKS\WINDOWS\V6.0A\INCLUDE under tools->options->categories.
I proceeded to compile it and get the following errors (shortened version):

c:\program files\microsoft sdks\windows\v6.0a\include\wbemcli.h(1737) : error C2061: syntax error : identifier '__RPC__in'<br />
c:\program files\microsoft sdks\windows\v6.0a\include\wbemcli.h(1744) : error C2061: syntax error : identifier '__RPC__in_opt'<br />
c:\program files\microsoft sdks\windows\v6.0a\include\wbemcli.h(1748) : error C2061: syntax error : identifier '__RPC__deref_out_opt'<br />
c:\program files\microsoft sdks\windows\v6.0a\include\wbemcli.h(1751) : error C2061: syntax error : identifier '__RPC__in'<br />
c:\program files\microsoft sdks\windows\v6.0a\include\wbemcli.h(3071) : error C2061: syntax error : identifier '__RPC__in'<br />
c:\program files\microsoft sdks\windows\v6.0a\include\wbemcli.h(3723) : error C2061: syntax error : identifier '__RPC__in_opt'<br />
c:\program files\microsoft sdks\windows\v6.0a\include\wbemprov.h(273) : error C2146: syntax error : missing ';' before identifier 'LPWSTR'<br />
c:\program files\microsoft sdks\windows\v6.0a\include\wbemprov.h(273) : fatal error C1004: unexpected end of file found<br />

Again, I searched around the internet. From other people's question and answers, there is one suggesting that I should add
#include <rpcsal.h></rpcsal.h>

I added #include <rpcsal.h></rpcsal.h> and get the following error:
fatal error C1083: Cannot open include file: 'sal.h': No such file or directory

Then, I add the following diretory to the the categories: C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO 9.0\VC\INCLUDE
Next, I get this error: error C2061: syntax error : identifier 'DWORD_PTR'
I have no idea how to continue from here. I am afraid I made some mistake in the middle of some where.

For your information, I installed the Visual Studio Express 2008 before installing Visual Studio 6.0.

Is there anyone can help me?
I would like to learn to use the WMI.
I have read another tutorial/sample from the Code Project, but I got the same problem since it was also using #include <wbemidl.h>.

**Update**

To let you better understand my situation, I would like to add some details.
I have multiple version of visual studio(VS Express 2008, VS 6) installed in my PC with VS 6 being the latest install. I have installed the service pack 6 as well.
In my Tools-> Option-> Directories, the default paths included are:

C:\Program Files\Microsoft Visual Studio\VC98\INCLUDE<br />
C:\Program Files\Microsoft Visual Studio\VC98\MFC\INCLUDE<br />
C:\Program Files\Microsoft Visual Studio\VC98\ATL\INCLUDE

Due to the fatal error C1083: Cannot open include file: 'Wbemidl.h': No such file or directory error, I included C:\PROGRAM FILES\MICROSOFT SDKS\WINDOWS\V6.0A\INCLUDE

As I browse through some forum, there is one guy(http://www.tech-archive.net/Archive/Media/microsoft.public.windowsmedia.sdk/2007-02/msg00105.html) suggested to include rpcsal.h . Again, I have to include C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO 9.0\VC\INCLUDE since the header file is not available in those four directories which I have included earlier. However, the error persist as mentioned above in the first post.

This morning, I changed the order of the path in Tools-> Option-> Directories from:
C:\Program Files\Microsoft Visual Studio\VC98\INCLUDE
C:\Program Files\Microsoft Visual Studio\VC98\MFC\INCLUDE
C:\Program Files\Microsoft Visual Studio\VC98\ATL\INCLUDE
C:\PROGRAM FILES\MICROSOFT SDKS\WINDOWS\V6.0A\INCLUDE
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO 9.0\VC\INCLUDE
To:
C:\PROGRAM FILES\MICROSOFT SDKS\WINDOWS\V6.0A\INCLUDE
C:\Program Files\Microsoft Visual Studio\VC98\INCLUDE
C:\Program Files\Microsoft Visual Studio\VC98\MFC\INCLUDE
C:\Program Files\Microsoft Visual Studio\VC98\ATL\INCLUDE
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO 9.0\VC\INCLUDE
Without changing any line of the codes, I get a different error messages which are:

c:\program files\microsoft sdks\windows\v6.0a\include\winnt.h(3417) : warning C4035: 'ReadPMC' : no return value<br />
c:\program files\microsoft sdks\windows\v6.0a\include\winnt.h(3447) : warning C4035: 'ReadTimeStampCounter' : no return value<br />
c:\program files\microsoft sdks\windows\v6.0a\include\wingdi.h(4340) : warning C4068: unknown pragma<br />
c:\program files\microsoft sdks\windows\v6.0a\include\wingdi.h(4341) : warning C4068: unknown pragma<br />
c:\program files\microsoft visual studio\vc98\include\comdef.h(695) : error C2065: 'IAsyncSetup' : undeclared identifier<br />
c:\program files\microsoft visual studio\vc98\include\comdef.h(710) : error C2065: 'IClassAccess' : undeclared identifier<br />
c:\program files\microsoft visual studio\vc98\include\comdef.h(712) : error C2065: 'IClassAdmin' : undeclared identifier<br />
c:\program files\microsoft visual studio\vc98\include\comdef.h(715) : error C2065: 'IClassRefresh' : undeclared identifier<br />
c:\program files\microsoft visual studio\vc98\include\comdef.h(750) : error C2065: 'IEnumClass' : undeclared identifier<br />
c:\program files\microsoft visual studio\vc98\include\comdef.h(762) : error C2065: 'IEnumPackage' : undeclared identifier<br />
c:\program files\microsoft visual studio\vc98\include\comdef.h(1078) : error C2065: 'IXMLElementNotificationSink' : undeclared identifier<br />
Error executing cl.exe.<br />

Is this a problem of my installation?
Or there are multiple version of header files with the same file names?
I don't understand why the header files is scattering in different places. Also, why rpcsal.h is not available in VC98\include folder nor is it available in C:\PROGRAM FILES\MICROSOFT SDKS\WINDOWS\V6.0A\INCLUDE?
Did I included any functions all files which is meant for .NET?

I am so confused. Please advice.

Re: Problem using WMI

Hamid_RT31-Aug-08 18:20

Hamid_RT

31-Aug-08 18:20

Did you try to set
"C:\Program Files\Microsoft SDKs\Windows\v6.0\Include" first in include paths?

Re: Problem using WMI

lhkok31-Aug-08 21:21

lhkok

31-Aug-08 21:21

When I set C:\Program Files\Microsoft SDKs\Windows\v6.0\Include on top of the include path list, I get the following message:

Cannot open include file: 'sal.h'

Please advice.

Re: Problem using WMI

Hamid_RT1-Sep-08 6:36

Hamid_RT

1-Sep-08 6:36

Did you set it before "$(VCInstallDir)PlatformSDK\include"?

Re: Problem using WMI

lhkok1-Sep-08 21:58

lhkok

1-Sep-08 21:58

Where and how can I set it?

Re: Problem using WMI

Hamid_RT1-Sep-08 22:47

Hamid_RT

1-Sep-08 22:47

Set "C:\Program Files\Microsoft SDKs\Windows\v6.0\Include" before "$(VCInstallDir)PlatformSDK\include".

String tokernize looking at the space character

CodingLover31-Aug-08 17:14

CodingLover

31-Aug-08 17:14

Hi all,

I want to count number of words depend on the space character. That means I want to tokernize a string. How can I do that. I'm looking at the strtok() function. But I can't use char* there in the following code.

int word()<br />
{<br />
  char *token;<br />
  std::string str = "This is a line of text";<br />
<br />
  token = strtok(str, " ");<br />
  do<br />
  {<br />
     printf("token: %s\n", token);<br />
  }<br />
  while (token = strtok(NULL, " "));<br />
}

Can somebody help me to do this.
Thanks

I appreciate your help all the time...
CodingLover Smile | :)

Re: String tokernize looking at the space character

bob1697231-Aug-08 17:27

bob16972

31-Aug-08 17:27

Have you tried using CStringT::Tokenize ?

Re: String tokernize looking at the space character

CodingLover31-Aug-08 18:03

CodingLover

31-Aug-08 18:03

Ah, actually I just want to use standard C++ only. Not with MFC pal. Reason is that until now whole my application develop on without C++ and I want to keep it as it is. Smile | :)

I appreciate your help all the time...
CodingLover Smile | :)

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