Re: How do I make this Unicode? - C / C++ / MFC Discussion Boards

Tony Fontenot8-May-02 17:51

8-May-02 17:51

I have an MFC Extension DLL implemented in my program. It is a simple modless dialog. Everything works fine in Debug but when I go to release and run it I get an Assertion right when I try to set a variable in the DLL class from the calling app.

I can post some code it need be, but has anyone seen this. And if so, what are some of the ways that you have fixed it.

Thanks in advance

***********************
Tony Fontenot
Recreational Solutions
tony@recsolutions.com
***********************

Re: MFC Extension DLL Problems

Tony Fontenot8-May-02 18:12

Tony Fontenot

8-May-02 18:12

Sorry all. I figured it out. I copied the wrong dll.

Blush | :O

***********************
Tony Fontenot
Recreational Solutions
tony@recsolutions.com
***********************

How do I make this Unicode?

Matt Newman8-May-02 17:08

Matt Newman

8-May-02 17:08

CString strFullName
gethostbyname(const char *name)

This won't compile under Unicode in VC 7, How should i fix this?

gethostbyname(strFullName);

Thanks

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Re: How do I make this Unicode?

Michael Dunn8-May-02 17:21

Michael Dunn

8-May-02 17:21

CString only converts to LPCTSTR, which is a Unicode string when building for Unicode. The quickest way is to use an ATL conversion macro:

#include <atlconv.h>
 
{
USES_CONVERSION;
 
  gethostbyname ( T2CA((LPCTSTR) strFullName) );
}

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Re: How do I make this Unicode?

Matt Newman9-May-02 11:26

Matt Newman

9-May-02 11:26

Michael Dunn wrote:

{ USES_CONVERSION; gethostbyname ( T2CA((LPCTSTR) strFullName) ); }

Where do I put this?

if I replace the original with this it just makes it unreadable characters Confused | :confused:

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Re: How do I make this Unicode?

Michael Dunn9-May-02 16:39

Michael Dunn

9-May-02 16:39

You'll need to post some more of your code, like for example what's in the CString prior to the call?

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Re: How do I make this Unicode?

Matt Newman14-May-02 15:26

Matt Newman

14-May-02 15:26

Sorry about the delay I was gone this weekend

CString strTemp;
int item = 0;

struct hostent *host;
struct in_addr *ptr;    // To retrieve the IP Address

DWORD dwScope = RESOURCE_CONTEXT;
NETRESOURCE *NetResource = NULL;
HANDLE hEnum;

WNetOpenEnum(dwScope, NULL, NULL, NULL, &hEnum);

WSADATA wsaData;

WSAStartup(MAKEWORD(1,1),&wsaData);

if (hEnum)
{
    DWORD Count = 0xFFFFFFFF;
    DWORD BufferSize = 2048;
    LPVOID Buffer = new char[2048];

    WNetEnumResource(hEnum, &Count, Buffer, &BufferSize);

    NetResource = (NETRESOURCE*)Buffer;

    char szHostName[200];

    for (unsigned int i = 0; i < BufferSize/sizeof(NETRESOURCE); i++, NetResource++)
    {
        if (NetResource->dwUsage == RESOURCEUSAGE_CONTAINER && NetResource->dwType == RESOURCETYPE_ANY)
        {
            if (NetResource->lpRemoteName)
            {
                CString strFullName = NetResource->lpRemoteName;

                char buf[512];

                if (0 == strFullName.Left(2).Compare(_T("\\\\")))
                strFullName = strFullName.Right(strFullName.GetLength()-2);
                <code>host = gethostbyname(strFullName));</code>  // Problem Spot

                if (!host) continue;

                ptr = (struct in_addr *) host->h_addr_list[0];

                sprintf(buf, "%d.%d.%d.%d", ptr->S_un.S_un_b.s_b1,
                    ptr->S_un.S_un_b.s_b2, ptr->S_un.S_un_b.s_b3, ptr->S_un.S_un_b.s_b4);\

                List->InsertItem(item++, strFullName, 0);
                List->SetItemText(item - 1, 1, (LPTSTR)buf);
                List->SetItemText(item - 1, 2, NetResource->lpComment);
            }
        }
    }

This is the original code,

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Re: How do I make this Unicode?

Paul M Watt8-May-02 17:24

Paul M Watt

8-May-02 17:24

Look at the function WideCharToMultiByte to convert the UNICODE string to a char*.

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Light a man on fire, and he will be warm for the rest of his life!

Re: How do I make this Unicode?

Nish Nishant8-May-02 17:24

Nish Nishant

8-May-02 17:24

This is basically a guess.
But you might try using WideCharToMultiByte to convert the unicode string to a normal string

Nish

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Using struct with CList

Coremn8-May-02 17:07

Coremn

8-May-02 17:07

Here you go, no please tell me how to make it work.
It does not like my CList expression (and neither do I Smile | :)

)

<br />
typedef struct <br />
{<br />
   int data;<br />
   int temp;<br />
<br />
}dataStructure;<br />
<br />
typedef CList <dataStructure,dataStructure> dataList;<br />
<br />
<code><br />
<br />
p.s thanks bracket tip

Re: Using struct with CList

Paul M Watt8-May-02 17:46

Paul M Watt

8-May-02 17:46

Coremn wrote:
typedef CList <<datastructure,datastructure>> dataList;

You should change that to this:

typedef CList <dataStructure,& dataStructure> dataList;

BTW, you can add the single < or > by using & lt; and & gt;, or excapsulate all of your code in between <PRE> and </PRE> tags.

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

Re: Using struct with CList

Christian Graus8-May-02 18:34

Christian Graus

8-May-02 18:34

< broken record >

CList sucks. Use std::list instead

< /broken record >

Christian

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And you don't spend much time with the opposite sex working day and night, unless the pizza delivery person happens to be young, cute, single and female. I can assure you, I've consumed more than a programmer's allotment of pizza, and these conditions have never aligned. - Christopher Duncan - 18/04/2002

Re: Using struct with CList

Coremn8-May-02 18:51

Coremn

8-May-02 18:51

Agreed

what happpened when casting

NicholasCougar8-May-02 16:55

NicholasCougar

8-May-02 16:55

Hi,
suppose there are to struct type,
struct small
{
float x;
double y;
};

struct large
{
int x;
float y;
double z;
bool w;
};
and in my program I coding as this:

large b;
small *p =(small) b;

what's going on inside the code operation?

Thank you.

Best regard.

I confess that I am a stubborn guy, but why not put things thoroughly, logically and systematically clean. One concrete prolem is worth a thousand unapplied abstractions.

Re: what happpened when casting [edited]

Nish Nishant8-May-02 17:19

Nish Nishant

8-May-02 17:19

NicholasCougar wrote:
small *p =(small) b;

This won't even compile. You are attempting to assign small to small*,( via unsafe casting).

Nish

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newb question:

stupration8-May-02 16:09

stupration

8-May-02 16:09

how do you add libs to a project in msvc? do you add the file itself to the project or include the name of said lib in the list of included libs in the project settings.

Re: newb question:

Paul M Watt8-May-02 16:17

Paul M Watt

8-May-02 16:17

You can do it either way, but I prefer to do it in the project settings.

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

Re: newb question:

8-May-02 22:32

Sometimes (always) I'm lazy...
so I add libs via include file, here an snip from my OpenGL project:

<br />
#pragma comment(lib, "OpenGL32.lib")	//link with OpenGL32 Library (VC6 Sytnax)<br />
#pragma comment(lib, "Glu32.lib")	//link with Glu32 Library<br />

Hoep it helps, Moak

My question more about "C"

Volki8-May-02 15:36

Volki

8-May-02 15:36

I'm learning to use DialogBoxes in "C", via LCC-win32 compiler. My question is about managing virtual-keys. I can manage them while dialogues don't have controls (via WM_KEYDOWN message) but otherwise can not capture these virtual-keys. I guess this is about focusing on child-windows(buttons, checkboxes etc). But why? How?... In fact I can manage them if I use "ACCELERATOR" but want to learn that if is there a solution to do this without accelerator tables. I can not give a meaning to this. Isn't this WM_KEYDOWN message sending before a control? For instance, I have an aboutbox which has two buttons(OK-CANCEL), how can I capture VK_END virtual-key?(again; without accelerator tables). Thanks from now on whose interested in.

Re: My question more about "C"

8-May-02 16:04

Maybe you could try handeling the pretranslate message and trap it there. Not sure, just a guess.

Paul S

Re: My question more about "C"

Nish Nishant8-May-02 17:18

Nish Nishant

8-May-02 17:18

In dialog boxes, handling accelerator keys require a slight tweak. I have explained this in the following article :-

http://www.codeproject.com/useritems/pretransdialog01.asp

Nish

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Re: My question more about "C"

Volki9-May-02 14:31

Volki

9-May-02 14:31

Hi,

Thanks Nish. Thanks for your advance. In fact I'm very weak in C++, nevertheless I will try your article

Transparent windows

redeemer8-May-02 12:48

redeemer

8-May-02 12:48

Anyone have some info on that? I'd very much like to learn something about it. The new Winamp 3 has it, anyone know anything about it?

Thankyou

Re: Transparent windows

Anders Molin8-May-02 13:18

Anders Molin

8-May-02 13:18

I don't remember the names of the functions you use to make transparent windows, but search in the articles, I know there's a couple about this subject...

- Anders

Money talks, but all mine ever says is "Goodbye!"

Re: Transparent windows

Christian Graus8-May-02 13:19

Christian Graus

8-May-02 13:19

They are supported only in W2000 and XP AFAIK. So to write an app that uses them you need to late bind to the function and detect the OS before callng them. I've done it, LMK if you can't find an article that covers this stuff and I'll knock one up for you.

Christian

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