|
>>void GetPointer(int **pNumber)
>>{
>> *pNumber = new int [SomeProgramVariable];
>> ...
>>}
"pointer to pointer" is just plain silly - in C++ it should almost always be reference to pointer :
void GetPointer(int *&pNumber)
{
pNumber = new int [SomeProgramVariable];
...
}
With "pointer to pointer" the following code compiles but crashes
GetPointer(NULL);
With "reference to pointer" it would never compile.
|
|
|
|
|
Ok. That's good. It's an alternate form.
No necesary it's plain silly!
Remember, good programers don't trust only on compiler. You should verify every part of code. And, if you look COM interfaces, 'pointer to pointer' is essential.
Oscar L.
|
|
|
|
|
This may be a dumb question, but I'm having trouble getting the CIPAddressCtrl in my application. When I place a IP Address Control on the dialog in the resource editor I can't start my app. The Run function fails to create my main Dialog when the app starts. If I try and manually create a CIPAssressCtrl in my OnInitDialog the create method return 0 every time. Anybody got some examples that I could look at?
Timothy Bish
|
|
|
|
|
the appwizard generated _tWinMain() looks like this
INITCOMMONCONTROLSEX iccx;
iccx.dwSize = sizeof(iccx);
iccx.dwICC = ICC_COOL_CLASSES | ICC_BAR_CLASSES;
BOOL bRet = ::InitCommonControlsEx(&iccx);
you need to add ICC_INTERNET_CLASSES to the dwICC member.
|
|
|
|
|
I have created a Registry Backup program that restores and saves certain registry files. However, it only works fine when logged on as an administrator. When logged on with less rights I have the following error:
1314 : A required privilege is not held by the client.
I know from previous investigations that privileges need to be set which I have done as follows:-
BOOL CRegistryBackupDlg::EnableBackupPrivilege()
{
HANDLE hToken = NULL;
if(!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
return FALSE;
TOKEN_PRIVILEGES tkp;
LookupPrivilegeValue(NULL, SE_BACKUP_NAME, &tkp.Privileges[0].Luid);
tkp.PrivilegeCount = 1;
tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
BOOL bOk = AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, NULL, 0);
CloseHandle(hToken);
return bOk;
}
and
BOOL CRegistryBackupDlg::EnableRestorePrivilege()
{
HANDLE hToken = NULL;
if(!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
return FALSE;
TOKEN_PRIVILEGES tkp;
LookupPrivilegeValue(NULL, SE_RESTORE_NAME, &tkp.Privileges[0].Luid);
tkp.PrivilegeCount = 1;
tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
BOOL bOk = AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, NULL, 0);
CloseHandle(hToken);
return bOk;
}
These usually allow to perform the functions. However I have pinpointed my problems down to RegSaveKey and RegRestoreKey not having sufficient privileges when not logged on as administrator.
My two regsitry calls look like this :-
lResult = RegSaveKey(hKey, m_current_path , NULL);
or
lResult = RegRestoreKey(hKey, m_current_path, NULL);
Like I said it usually works when logged on as administrator so I know that the majority of my code works it just a slight tweak of the privileges that is required but I really don't what is needed. Can you help?
Thanks in advance. 
|
|
|
|
|
The RegSaveKey() and RegRestoreKey() docs say you need the SE_RESTORE_NAME priv, not SE_BACKUP_NAME. Try changing that.
--Mike--
http://home.inreach.com/mdunn/
"Holding the away team at bay with a non-functioning phaser was an act of unmitigated gall. I admire gall."
-- Lt. Cmdr. Worf
|
|
|
|
|
I have already set these privileges it appears to be more involved than that.
|
|
|
|
|
I need to make my own control that should be a rather complicated list box. But where do I start? Is there any good tutorials for this on the net or books?
Should I inherit from CWnd or CListCtrl? Stuff like that, that I need answers to.
Cheers
|
|
|
|
|
Here is a good place to start
http://www.codeproject.com/combobox/
|
|
|
|
|
Hi,
I have a dialog with a static text control. I want to change it's caption at run time. Despite it having an ID in the .rc file (IDC_STATIC), it doesn't come up in classwizard so i can't map it to a CStatic object and thus use the inherited CWnd::SetWindowText member function to update it's text.
I tried manually adding the mapping with :
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CMonemupdDlg)
DDX_Control(pDX, IDCLOSE, m_Close);
DDX_Control(pDX, IDC_STATIC, m_Static);
//}}AFX_DATA_MAP
and defining CStatic m_Static in the header file, in the same place as the ClassWizard created definition for IDCLOSE/m_Close. But although this compiles, I get a debug assertation failure in dlgdata.cpp at line 37.
What am I doing wrong?
I know that I could just use CStatic::Create to create the static text control but i'd far rather have the resource managed in the dialog editor.
Thanks for your help
Jon
|
|
|
|
|
IDC_STATIC is a special identifier: has a value of -1 and it's used to mark controls that are not accessed at runtime. Change it to something else, like IDC_TXT1, and you'll see it in the class wizard.
Anyway, if you just want to change the text in response to some event (e.g. button being pushed), you can always use this:
GetDlgItem(IDC_TXT1)->SetWindowText("new text");
Tomasz Sowinski -- http://www.shooltz.com
|
|
|
|
|
ok in my application i have this error message when i try to build my project:
"C:\program files\microsoft visual studio\vc98\mfc\include\afxv_32.h(14): fatal error C1189: #error : WINDOWS.H already included. MFC apps must mot "include <windows.h>
my application is created with mfc appwizard exe, and i have choosen the dialog based option.
So, in my dialog box i have put an button which must access an excel database with ADO method.
so....? idon't know what is happening.
gerald
|
|
|
|
|
Check stdafx.h. Probably you have #include <windows.h> before afxwin.h.
Tomasz Sowinski -- http://www.shooltz.com
|
|
|
|
|
Hi,
I like to know how can I get a pointer to the previous document template?
Basically have access to the data of precious document.
Thank
Ehsan Behboudi
|
|
|
|
|
previous document or previous document template? the twoa re very different creatures
if you need a particular doc template you can iterate thru the list using CApp::GetFirstDocTemplate() and CApp::GetNextDocTemplate()
if you need the previous document you can iterate through the list of docs of that type by using pTemplate->GetFirstDocPosition() and pTemplate->GetNextDocPosition() (where pTemplate is a pointer to the doc template for those doc types)
---
"every year we invent better idiot proof systems and every year they invent better idiots"
|
|
|
|
|
Hello!
Does anyone know how can we insert two string tables in a dialog based application. And how to load data from each string table.
The string id's in both string tables can be same.
I need it urgent.
![Rose | [Rose]](https://codeproject.freetls.fastly.net/script/Forums/Images/rose.gif)
|
|
|
|
|
Why do you need two strings with same identifiers? Is this a multi-language app?
Tomasz Sowinski -- http://www.shooltz.com
|
|
|
|
|
Yes it is a multi-language application.
Can u help me plz..
|
|
|
|
|
Create separate resource .dlls for each language, then load appropriate one at runtime. If you're using MFC, check AfxSetResourceHandle function and MFC Technical Note 57 (it's in VC++ help).
Tomasz Sowinski -- http://www.shooltz.com
|
|
|
|
|
There are two ways to do this, which way you choose depends on your needs.
1) If you are NT/2000/XP only, then you can simply change the language identifier in VC6 and type a new string. Then, in your app you use SetLocaleID (or something similar, don't have the exact call here) to change which Locale will be the default.
2) If you need to support Win95/98/ME, create seperate resource DLL's for each language and then load the right DLL at runtime. If you're using MFC, you can call AfxSetResourceModule() or something similar (Again, don't have my docs handy) to point to it. If you're not using MFC, then you'll need to specify the DLL's handle when getting the string.
|
|
|
|
|
When I use this function,I get some tousle code.This following is my code.
Anyone can help me and give me some advice?
CInternetSession* cis=new CInternetSession;
CHttpConnection* pHttpCon=cis->GetHttpConnection(_T("192.168.0.17"),INTERNET_FLAG_RELOAD | INTERNET_FLAG_DONT_CACHE,8007);
CHttpFile * pFile;
//pFile=pHttpCon->OpenRequest(CHttpConnection::HTTP_VERB_GET,_T("/a.xml"));
// pFile->SendRequest();
pFile=(CHttpFile *)cis->OpenURL(_T("Http://192.168.0.17:8007/a.xml"),1,INTERNET_FLAG_TRANSFER_ASCII);
CString szSession,szResult("\0");
while(pFile->ReadString(szSession)!=FALSE)
{
szResult=szResult+szSession;
}
//DWORD dwRet;
//pFile->QueryInfoStatusCode(dwRet);
//if (dwRet == HTTP_STATUS_OK)
//{
// pFile->ReadString(szSession);
// }
MessageBox（szResult)；
//int n=szSession.Find(_T("Session"));
// if(n==-1)
// MessageBox(_T("Not Find Session"));
pFile->Close();
pFile = NULL;
delete pFile;
pHttpCon->Close();
pHttpCon = NULL;
delete pHttpCon;
cis->Close();
cis = NULL;
delete cis;
|
|
|
|
|
I can see that you use _T(), are you using UNICODE strings?
If you are, it don't work. If you send and receive UNICODE strings, the data you receive is just crap...
- Anders
Money talks, but all mine ever says is "Goodbye!"
|
|
|
|
|
But how can I use the OpenURL() function?Can you give me a sample?
When I try this, I get a error "URL not use a discriminating protocol"
pFile=(CHttpFile *)cis->OpenURL((LPCTSTR)("http://192.168.0.17:8007/a.XML"));
|
|
|
|
|
Thank you.
I have resolved this question by using Function Read() instead of ReadString();P
|
|
|
|
|
OK, I need for my application to catch data in an excel database. So, I know th methode to get data, but when I try to compile my application I have this kind of error message:
"error C2501:'_RecorsetPtr':missing storage-class or type specifier"
what do I have to do to repair this error?
thanks for your help.
Gerald
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
