Base class constructor - C / C++ / MFC Discussion Boards

Mazdak23-Oct-02 23:30

23-Oct-02 23:30

I have a class that subclass from CEdit.Now I want to subclass from this class.After I make generic class and subclass it from that class,after compiling I got many errors in my base class.Also I got an error that:

error C2504: 'CEdit' : base class undefined

Mazy

"If I go crazy then will you still
Call me Superman
If I’m alive and well, will you be
There holding my hand
I’ll keep you by my side with
My superhuman might
Kryptonite"Kryptonite-3 Doors Down

Re: Subclassing problem

Simon.W24-Oct-02 1:15

Simon.W

24-Oct-02 1:15

Make sure whether you include MFC header file

I am seeking...
For what?
Why did you ask me for what? I don't know!

Re: Subclassing problem

Mazdak24-Oct-02 1:43

Mazdak

24-Oct-02 1:43

XSimon wrote:
MFC header

Could you name them please?

Mazy

"If I go crazy then will you still
Call me Superman
If I’m alive and well, will you be
There holding my hand
I’ll keep you by my side with
My superhuman might
Kryptonite"Kryptonite-3 Doors Down

How to sort CArray?

ooosawaddee323-Oct-02 22:58

ooosawaddee3

23-Oct-02 22:58

I declare this below data.

[code]
CArray<unsigned char,="" unsigned="" char=""> m_data1, m_data2, m_data3, m_data4;
[/code]

I want to to sort m_data1, m_data2, m_data3, m_data4.
If you know how to do that, please tell me.

Thank you very much.

Re: How to sort CArray?

Christian Graus24-Oct-02 0:24

Christian Graus

24-Oct-02 0:24

I honestly don't know, but this is one major reason why you'd be better off to ditch CArray for std::vector. I have a number of articles here on CP with regard to the STL to get you started.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

Re: How to sort CArray?

Atlantys24-Oct-02 3:34

Atlantys

24-Oct-02 3:34

CArray doesn't have a built-in Sort function. So you'd either have to write your own (using Quicksort and friends).

I'd suggest just scrapping the whole idea of using CArray (and MFC collections) and move onto std::vector and std::sort (i used to be an MFC junkie, but I've been converted to STL Big Grin | :-D

Re: How to sort CArray?

Mike Eriksson25-Oct-02 0:06

Mike Eriksson

25-Oct-02 0:06

Hello!

Since you already have gotten a couple of suggestion to use STL, I thought I give you what you asked for Poke tongue | ;-P

Here on CodeProject there is a article about this!
Mr. Martin Ziacek has described how to use quicksort together with CArray.

http://www.codeproject.com/cpp/qarray.asp

Mike Eriksson
Sonork 100.21825

Base class constructor

Mazdak23-Oct-02 21:46

Mazdak

23-Oct-02 21:46

I have a class that base from anothrt one.I want its constructor be a base class constructor.How can I do it?

Mazy

"If I go crazy then will you still
Call me Superman
If I’m alive and well, will you be
There holding my hand
I’ll keep you by my side with
My superhuman might
Kryptonite"Kryptonite-3 Doors Down

Re: Base class constructor

Daniel Turini23-Oct-02 21:58

Daniel Turini

23-Oct-02 21:58

I don't know if this is what you want, but:

Class A
{
     A(int x)
     {
     }
}

Class B
{
    B(int x)
       : A(x)
    {
    }
}

Q261186 - Computer Randomly Plays Classical Music

Re: Base class constructor

Mazdak23-Oct-02 22:28

Mazdak

23-Oct-02 22:28

Thanks

Mazy

"If I go crazy then will you still
Call me Superman
If I’m alive and well, will you be
There holding my hand
I’ll keep you by my side with
My superhuman might
Kryptonite"Kryptonite-3 Doors Down

Request LAN-ID?

Andreas_DE23-Oct-02 21:30

Andreas_DE

23-Oct-02 21:30

Hello,
does anybody know how to get the unique LAN-ID from MFC C++?
I have to code a license control tool...
Thank you for answers!
Andreas Niedermeier

==----===

Re: Request LAN-ID?

Simon.W24-Oct-02 1:25

Simon.W

24-Oct-02 1:25

You can use the physical address of your net adapter

int CTcpCfg::GetMacAddress(LPMAC_ADDRESS pMacAddr)
{
NCB ncb;
UCHAR uRetCode;
int num = 0;
LANA_ENUM lana_enum;
memset(&ncb, 0, sizeof(ncb) );
ncb.ncb_command = NCBENUM;
ncb.ncb_buffer = (unsigned char *)&lana_enum;
ncb.ncb_length = sizeof(lana_enum);
//ÏòÍø¿¨·¢ËÍNCBENUMÃüÁî,ÒÔ»ñÈ¡µ±Ç°»úÆ÷µÄÍø¿¨ÐÅÏ¢,ÈçÓÐ¶àÉÙ¸öÍø¿¨
//Ã¿ÕÅÍø¿¨µÄ±àºÅµÈ
uRetCode = Netbios(&ncb);
if (uRetCode == 0)
{
num = lana_enum.length;
//¶ÔÃ¿Ò»ÕÅÍø¿¨,ÒÔÆäÍø¿¨±àºÅÎªÊäÈë±àºÅ,»ñÈ¡ÆäMACµØÖ·
for (int i = 0; i < num; i++)
{
ASTAT Adapter;
if(GetAddressByIndex(lana_enum.lana[i],Adapter) == 0)
{
pMacAddr[i].b1 = Adapter.adapt.adapter_address[0];
pMacAddr[i].b2 = Adapter.adapt.adapter_address[1];
pMacAddr[i].b3 = Adapter.adapt.adapter_address[2];
pMacAddr[i].b4 = Adapter.adapt.adapter_address[3];
pMacAddr[i].b5 = Adapter.adapt.adapter_address[4];
pMacAddr[i].b6 = Adapter.adapt.adapter_address[5];
}
}
}
return num;
}

I am seeking...
For what?
Why did you ask me for what? I don't know!

CListCtrl, setitem problem...

Ahmet Orkun GEDiK23-Oct-02 20:58

Ahmet Orkun GEDiK

23-Oct-02 20:58

Hello;

I'm in trouble with setitem method of CListCtrl. Actually, i have set the item value, but it has not get the correct value at following code part.

<br />
int n=0, idx=0;<br />
CString pbBuffer;<br />
char chngval;<br />
char hexval[2];<br />
char* out;<br />
out = (char*)malloc(sizeof(char) * 41);<br />
memset(out, 0x00000000, sizeof(char) * 41);<br />
<br />
while(m_cPeriodList.GetCount()!=idx)<br />
{<br />
	m_cPeriodList.GetText(idx, pbBuffer);<br />
	n=wcstol(pbBuffer, '\0', 10);<br />
	// Convert to hex<br />
	memset(hexval, 0, sizeof(hexval));<br />
	for (int i=1; i>=0; i--) {<br />
		 chngval="0123456789ABCDEF"[((n >> i*4) & 0xF)];<br />
		 memcpy(hexval+(1-i), &chngval, sizeof(char));<br />
	}<br />
	hexval[2]='\0';<br />
	idx++;<br />
	strcat(out, hexval);<br />
}<br />
<br />
// Complete format<br />
int zerocounter=(40-(idx*2))/2;<br />
for(int temp_idx=0; zerocounter!=temp_idx; temp_idx++)<br />
	strcat(out, "00");<br />
<br />
// Set comment<br />
lvi->mask = LVIF_TEXT;<br />
lvi->iSubItem = 3;<br />
lvi->iItem = 0;<br />
lvi->pszText = (LPTSTR)(LPCTSTR)out;<br />
m_list->SetItem(lvi);<br />
szTemp.Empty();<br />
<br />
free(out);<br />

Everythings going fine until "lvi->pszText = (LPTSTR)(LPCTSTR)out;". At this statement, the out value has "B0B0B0B0", but lvi->pszText show own value like "?????????????". What does it mean?

Thank you

Re: CListCtrl, setitem problem...

Christian Graus23-Oct-02 21:42

Christian Graus

23-Oct-02 21:42

Why are you mixing C and C++ ?

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

Re: CListCtrl, setitem problem...

Ahmet Orkun GEDiK23-Oct-02 21:52

Ahmet Orkun GEDiK

23-Oct-02 21:52

Just a sample for myself. Sorry.

Re: CListCtrl, setitem problem...

Ahmet Orkun GEDiK24-Oct-02 2:55

Ahmet Orkun GEDiK

24-Oct-02 2:55

I've changed my code to C++ and life is good now.

INT iHexIdx=0; // Hex convertion loop index
LONG lRowIdx=0; // Row index pointer
LONG lRowLongValue=0; // Converted row value
CString rTemp; // Temporary value
CString rString; // Listbox selected item text

// Loop until end of list
while(m_cPeriodList.GetCount()!=lRowIdx)
{
// Get text from listbox
m_cPeriodList.GetText(lRowIdx, rString);

// Convert CString listbox value to LONG
lRowLongValue = _wtoi(rString.GetBuffer(rString.GetLength()));

// Convert byte to hex
for(iHexIdx=1; iHexIdx>=0; iHexIdx--)
rTemp.Insert((rTemp.GetLength()+(1-iHexIdx)),("0123456789ABCDEF"[((lRowLongValue >> iHexIdx*4) & 0xF)]));

// Increase row index
lRowIdx++;
}
// Fill empty bytes with 0
for(iHexIdx=rTemp.GetLength(); iHexIdx<=40; iHexIdx++)
rTemp.Insert(iHexIdx, _T("0"));

// Set comment
lvi->mask = LVIF_TEXT;
lvi->iSubItem = 3;
lvi->iItem = 0;
lvi->pszText = (LPTSTR)(LPCTSTR)rTemp;
m_list->SetItem(lvi);

Modeless

udayGovekar23-Oct-02 20:54

udayGovekar

23-Oct-02 20:54

How to Handle Escape button in Modeless Dialog

Thanks
Uday

Re: Modeless

Paul M Watt23-Oct-02 21:19

Paul M Watt

23-Oct-02 21:19

You will need to use the IsDialogMessage function in your message loop to dispatch your message to the dialog rather than DispatchMessage.

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!

BSTR --> CString ?

Daniel Strigl23-Oct-02 20:16

Daniel Strigl

23-Oct-02 20:16

What's the fastest and easiest way to convert a BSTR to a MFC CString?

Daniel Wink | ;)

---------------------------
Never change a running system!

Re: BSTR --> CString ?

klphua23-Oct-02 21:13

klphua

23-Oct-02 21:13

donno whether this is the fastest or easiest, but I've been coding it like this:
CString str = static_cast<LPCTSTR>( bstr );

Re: BSTR --> CString ?

Christian Graus23-Oct-02 21:22

Christian Graus

23-Oct-02 21:22

Does that work ? I don't see how it can.....

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

Re: BSTR --> CString ?

Daniel Turini23-Oct-02 21:32

Daniel Turini

23-Oct-02 21:32

Yes, this works, but be careful: by definition a NULL BSTR is an empty string. This cast can be dangerous. Your solution is safer.

Q261186 - Computer Randomly Plays Classical Music

Re: BSTR --> CString ?

Christian Graus23-Oct-02 21:23

Christian Graus

23-Oct-02 21:23

_bstr_t is a wrapper class that does the conversion for you, so you can do this:

CString s((_bstr_t)BSTR);

This will create a _bstr_t, which will return a char * to the CString constructor.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

Re: BSTR --> CString ?

klphua23-Oct-02 21:27

klphua

23-Oct-02 21:27

sorry i forgot, that bstr is of type _bstr_t. u r rite, Chris.

Re: BSTR --> CString ?

Christian Graus23-Oct-02 21:39

Christian Graus

23-Oct-02 21:39

No worries Smile | :)

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

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