Re: what is difference of &buf and *buf?? - C / C++ / MFC Discussion Boards

viperlogic8-Mar-06 4:07

8-Mar-06 4:07

hi
i have a small app im putting together. i have put in a "IP Address" box and have a button then when click will store the ip address.

from what i can see you use CIPAddressCtrl::GetAddress to get this address, what am i doing wrong below? I am using vc++6.

BYTE nField0, nField1, nField2, nField3;
int rc = CIPAddressCtrl::GetAddress(nField0, nField1, nField2, nField3);

should that not put the address into each one of those byte fields?

i am getting an error as below..
error C2352: 'CIPAddressCtrl::GetAddress' : illegal call of non-static member function.
afxcmn.h(1112) : see declaration of 'GetAddress'

please help
thanks

Re: using CIPAddressCtrl::GetAddress

David Crow8-Mar-06 4:53

David Crow

8-Mar-06 4:53

GetAddress() is not a static member. It must be called in the context of a CIPAddressCtrl object. Use ClassWizard to associate the control with a CIPAddressCtrl object.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: using CIPAddressCtrl::GetAddress

viperlogic8-Mar-06 4:56

viperlogic

8-Mar-06 4:56

many thanks for the reply

can you further explain this as MFC is new to me?

thansk again

Re: using CIPAddressCtrl::GetAddress

David Crow8-Mar-06 5:10

David Crow

8-Mar-06 5:10

keithlee wrote:
can you further explain this as MFC is new to me?

Which part? Use Ctrl+W to open ClassWizard. Click the Member Variables tab. Select the desired control and click the Add Variable... button.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: using CIPAddressCtrl::GetAddress

viperlogic8-Mar-06 5:19

viperlogic

8-Mar-06 5:19

stupid me!! i had that already done with out knowing it

m_strIP2.GetAddress(nField0, nField1, nField2, nField3);

did the trick then

thanks for your help

what is difference of &buf and *buf??

beardy janggut8-Mar-06 3:56

beardy janggut

8-Mar-06 3:56

i guess &buf return the address of buf and *buf is a pointer of buf. what is the importanc of using both of them?? Laugh | :laugh:

what is the advantages of VC++ compared to VBasic??

i used fread to read a text file. then i want to insert the character of ' '(space) in betwen two words. does it effect the adress of the word in the file??
HelpMe

Re: what is difference of &buf and *buf??

toxcct8-Mar-06 4:13

toxcct

8-Mar-06 4:13

beardy janggut wrote:
what is difference of &buf and *buf??

depends if you're talking in a declaration, or when using the variable.

MyType  t;     //declaration of a MyType object
MyType* pt;    //declaration of a pointer to a MyType object
MyType& rt;    //declaration of a reference on a MyType object
 
pt = &t;       //assigning pt with address of t
*pt = /*...*/; //accessing the content of the address pointed to by pt
 
rt = t;        //assigning rt referencing t object
rt = /*...*/;  //accessing the content of the variable referenced by rt

beardy janggut wrote:
what is the advantages of VC++ compared to VBasic??

Visual Basic is no way comparable with C++. C++ (thus Visual C++) produces natice code. native code is a binary code which is undertood directly by the microprocessor.
any Visual Basic before VB.NET were interpreted languages.
moreover, when C++ can do anything on a computer, Basic languages are pretty limited.
one last thing about VB vs C++. Basic languages are too much permissive and can let the developer take bad habits at programming. in C++, the compiler and the linker are quite strict in this way.

Re: what is difference of &buf and *buf??

Cedric Moonen8-Mar-06 4:18

Cedric Moonen

8-Mar-06 4:18

& is used to get the address of a variable: int Test = 7;, now, &Test will be the adress of the Test variable.

* is used to get the content pointed by a pointer. So, *(&Test) will give you 7 (wich is the content of the address).

beardy janggut wrote:
what is the advantages of VC++ compared to VBasic??

Lots of things have been written about this subject, it is not like saying C++ or VB is better. It depends of your expectations. (Althought, lot of people here will say you that VB is crap Poke tongue | ;-P

beardy janggut wrote:
i used fread to read a text file. then i want to insert the character of ' '(space) in betwen two words. does it effect the adress of the word in the file??

You can't insert text like that in a file. You need to create a new file, write the data that is before what you want to insert, then write what you want to insert and finally write the rest of the data.

BrowseObject

MON2058-Mar-06 3:41

MON205

8-Mar-06 3:41

I'm trying using the IShellBrowser::BrowseObject function. After a hard working, finally it works. But now I found that it doesn't work on Windows 98 although it returns NOERROR.
Any one can help me?!!

M.N

MS Word

micutzu8-Mar-06 3:37

micutzu

8-Mar-06 3:37

Hello,

I have MS Word as the top window and a document is opened (let’s say Test.doc). I am wondering if there is a way to find out the path in which the Test.doc file is located (on a local folder or on a network share). Does anyone know a good article?

Thank you.

Re: MS Word

David Crow8-Mar-06 5:08

David Crow

8-Mar-06 5:08

See if MSDN article Q183599 is of any help. It's not a direct answer to your question, but it may point you in the right direction, which is often a better choice anyhow.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: MS Word

micutzu8-Mar-06 19:24

micutzu

8-Mar-06 19:24

Dear David,

Thank you very much. It seems that the article is a good approach of what I am looking for.

Best Regards,

Re: MS Word

David Crow13-Mar-06 9:18

David Crow

13-Mar-06 9:18

You might be able to get away with something like:

_Application WordApp;
_Document Doc;
LPDISPATCH pDisp;
LPUNKNOWN pUnk;
CLSID clsid;
 
::CLSIDFromProgID(L"Word.Application", &clsid);
if (::GetActiveObject(clsid, NULL, &pUnk) == S_OK)
{
    VERIFY(pUnk->QueryInterface(IID_IDispatch, (void**) &pDisp) == S_OK);
    WordApp.AttachDispatch(pDisp);
    pUnk->Release();
 
    Doc = WordApp.GetActiveDocument();
    CString str = Doc.GetFullName();
}

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Using STL classes in a DLL

pplshero548-Mar-06 3:34

pplshero54

8-Mar-06 3:34

I am writing a program that uses data structures such s std::vector and std::map and when I write a class that uses the structures and put the class in a dll, the compiler warns me against this saying the template classes cannot be exported.

Warning I recieved:
warning C4251: 'a' : class 'vector<int>' needs to have dll-interface to be used by clients of class 'MyClass'

a is a std::vector in my class MyClass

I get similar messages with std::map and the other data structures of the STL

Is there anyway around this problem because I do not want to write my own data structures but instead I want to use the STL.<code></code>

pplshero54 gives his most thanks

Re: Using STL classes in a DLL

pplshero548-Mar-06 3:37

pplshero54

8-Mar-06 3:37

I am using Visual C++.NET

pplshero54 gives his most thanks

Re: Using STL classes in a DLL

toxcct8-Mar-06 3:40

toxcct

8-Mar-06 3:40

did you correctly said that std::vector<> had to be exported from the DLL with a mechanism such as __declspec( dllexport )

Re: Using STL classes in a DLL

pplshero548-Mar-06 5:52

pplshero54

8-Mar-06 5:52

yes, I did all the correct __declspec stuff

pplshero54 gives his most thanks

Pointers to IE

folkenmax8-Mar-06 3:11

folkenmax

8-Mar-06 3:11

How to acquired a pointer to Internet Explorer's IWebBrowser2 interface from IOleClientSite and IOleContainer?

Thanks

Re: Pointers to IE

Hamid_RT8-Mar-06 7:50

Hamid_RT

8-Mar-06 7:50

what do you need? IWebBrowser2 or IOleClientSite

Re: Pointers to IE

folkenmax8-Mar-06 8:10

folkenmax

8-Mar-06 8:10

Need to run this:

IOleCommandTarget* pCmdTarg;
CComPtr pWB;
CoCreateInstance(CLSID_WebBrowser, NULL, CLSCTX_INPROC, IID_IWebBrowser2, (void**)&pWB);
pWB->QueryInterface(IID_IOleCommandTarget, (void**)&pCmdTarg);
VARIANT vTemplatePath;
V_VT(&vTemplatePath) = VT_BSTR;
CComVariant vPTPath = argv[1];
pCmdTarg->Exec(&CGID_MSHTML, IDM_PRINTPREVIEW, NULL, &vPTPath, NULL);

But the pointer don't work.

Re: Pointers to IE

Hamid_RT8-Mar-06 8:52

Hamid_RT

8-Mar-06 8:52

if you change to CComPtr pWB to IWebBrowser2 pWB what happen?

Re: Pointers to IE

folkenmax8-Mar-06 8:59

folkenmax

8-Mar-06 8:59

Sorry! The code was this way: CComPtr <iwebbrowser2> pWB;

Re: Pointers to IE

Hamid_RT8-Mar-06 9:14