C / C++ / MFC

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

31-Aug-08 18:13

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

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

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.

Hamid_RT31-Aug-08 18:20

31-Aug-08 18:20

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

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.

Hamid_RT1-Sep-08 6:36

1-Sep-08 6:36

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

lhkok1-Sep-08 21:58

lhkok

1-Sep-08 21:58

Where and how can I set it?

Hamid_RT1-Sep-08 22:47

String tokernize looking at the space character

1-Sep-08 22:47

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

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 | :)

Re: String tokernize looking at the space character

Jijo.Raj31-Aug-08 19:46

Jijo.Raj

31-Aug-08 19:46

If you want to stick to C++, then better use std::stringstream. Check this link[^] about how to split strings using stringstream.

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

Re: String tokernize looking at the space character

Rane31-Aug-08 19:51

Rane

31-Aug-08 19:51

The function isspace will help you in this case. Loop through & check character by character. If you encounter a space, increment the count.. Cool | :cool:

Regards,
Rane

Re: String tokernize looking at the space character

Bram van Kampen1-Sep-08 16:15

Re: String tokernize looking at the space character

1-Sep-08 16:15

CodingLover wrote:
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 | :)

Bram van Kampen

bob169726-Sep-08 5:06

bob16972

6-Sep-08 5:06

CodingLover wrote:
my application develop on without C++

???????

Should we have a Function for Every Flavour of Char Operations ?

Bram van Kampen1-Sep-08 16:11

Occasional Exceptions when Setting Menus.

1-Sep-08 16:11

Hi,

Why not go back to basics, read chars one by one, and use isspace(x)
About three nested loops will do the trick, and you can debug it yourself.
You then do not need to spend hours scouring the Internet for obscure specifications, and even more hours studying same.

I know the performance argument. Unless if you have gazillions of data to sift thru, I personally have found that issue largely accademic.

Regards Smile | :)

Bram van Kampen

Bram van Kampen31-Aug-08 14:48

Re: Occasional Exceptions when Setting Menus.

31-Aug-08 14:48

Hi,
I have a Dialog Based App, which requires different menu's in the Main Dialog depending on a situation investigated during InitInstance(). dlg.m_nMode is set by InitInstance();

CMenu * pMenu=GetMenu();
pMenu->Detach();

switch(m_nMode){
case MODE_NOT_STARTED:
ASSERT(0);//Should Never Happen
exit(0);
break;
case MODE_MASTER:
pMenu->LoadMenu(IDR_MENU_MASTER);
SetMenu(pMenu);
SetStatusText("Running Process...");
break;
case MODE_SLAVE:
pMenu->LoadMenu(IDR_MENU_SLAVE);
SetMenu(pMenu);
SetStatusText("Monitoring Process...");
break;
}
All behaves as expected, except that on rare occasions I get an exception when closing down relating to the unwinding of the handle map.

Bram van Kampen

Naveen31-Aug-08 15:23

Naveen

31-Aug-08 15:23

Bram van Kampen wrote:
CMenu * pMenu=GetMenu();
pMenu->Detach();
.
.
pMenu->LoadMenu(IDR_MENU_MASTER);

I think the problem is because of using the pointer returned by GetMenu() function. Such pointers are actually temporary objects and will be destroyed in while process is Idle.

So instead of

CMenu * pMenu=GetMenu();<br />
pMenu->Detach();

try
CMenu * pMenu= new CMenu();

And dont forget to delete the pointer after use.

nave

[OpenedFileFinder]

Re: Occasional Exceptions when Setting Menus. [modified]

Bram van Kampen1-Sep-08 15:09