Visual Studio 6.0 - C / C++ / MFC Discussion Boards

Re: How to covert CString to TCHAR and CString to LPCWSTR?

RChin30-Jun-03 1:39

RChin

30-Jun-03 1:39

If you need to copy a CString object to an array of TCHAR you could do:

<font color="green">
// assume strText is your CString ...
</font>

TCHAR *czArray = NULL; 

<font color="green">// allocate character array</font>
czArray = new TCHAR[strText.GetLength() + 1]; 
_tcscpy(czArray, (LPCTSTR)strText);

<font color="green">// DO WHATEVERR

// Cleanup</font>
delete [] czArray;

The CString object has the LPCTSTR operator cast, so you can just cast your CString object to a LPCWSTR (LPCSTR if not unicode). Note that this is used in the above example for the _tcscpy function

For further reading, have a look at the strings section of Codeproject, there are a few good articles that is a must-read.

"..Even my comments have bugs!"

Inspired by Toni78

Re: How to covert CString to TCHAR and CString to LPCWSTR?

Peter Weyzen30-Jun-03 8:45

Peter Weyzen

30-Jun-03 8:45

the easy way:

<br />
USES_CONVERSION;<br />
<br />
CString Str(_T("This is my string"));<br />
<br />
// explicit copy as single byte chars (LCPSTR)<br />
char charBuf[255];<br />
strcpy( charbuf, T2CA(Str) );<br />
<br />
// explicit copy as wide chars (LPCWSTR)<br />
wchar_t wcharBuf[255];<br />
wsccpy( wcharBuf, T2CW(Str) );<br />
<br />
// generic TCHAR copy (LPCTSTR)<br />
TCHAR tcharBuf[255];<br />
_tcscpy( tcharBuf, Str );<br />

this works in UNICODE and non-UNICODE.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
Santa Cruz Networks

pointer to the app

andyg.10130-Jun-03 1:16

andyg.101

30-Jun-03 1:16

Hi i've got an object that I want to use with a number of dialogues, so I declared it in my App class, and I was then going to use a pointer to the app object to acess it in all my dialogues.

How do I get the pointer to the app to access the object?

At the moment I have something like
CtheApp* m_pApp;

but how do I initialise the pointer to point at the app?

I tried something like
m_pApp = &theApp;
but I just get the compiler saying that theApp is an undeclared variable but I thought it was a global. Can someone enlighten me as to the way to proceed?
Thanks
Andy

Re: pointer to the app

RChin30-Jun-03 1:43

RChin

30-Jun-03 1:43

<br />
CMyApp* theApp = static_cast<CMyApp*>(AfxGetApp());<br />

"..Even my comments have bugs!"

Inspired by Toni78

Re: pointer to the app

andyg.10130-Jun-03 2:21

andyg.101

30-Jun-03 2:21

nice one, thanks, but what is the
static_cast for can't I just use AfxGetApp on its own?
Andy

Re: pointer to the app

David Crow30-Jun-03 2:43

David Crow

30-Jun-03 2:43

Yes, but it will return you a CWinApp pointer, not a CtheApp pointer. That's why it must be cast to the appropriate type.

Re: pointer to the app

RChin30-Jun-03 3:23

RChin

30-Jun-03 3:23

DavidCrow wrote:
Yes, but it will return you a CWinApp pointer, not a CtheApp pointer

Exactly.
AfxGetApp() Returns a CWinApp class pointer. If you want to reference your specific class, you have to cast the returned pointer to your application class. This will allow you to access your member functions. The olden way of casting used to be of the form:

CMyClass* pClass = (CMyClass*)(ParentClass);
<pre>
</code>

But the (now) standard way of casting C++ classes take the form:
<pre>
<code>
CMyClass* pClass = static_cast<CMyClass*>(ParentClass);
</code>

"..Even my comments have bugs!"

Inspired by Toni78

Visual Studio 6.0

Bernhard30-Jun-03 1:13

Bernhard

30-Jun-03 1:13

okay.. i don't know if this is the right forum..
can anybody explain me the regular expression search & replace utility?
(or is there any documentation on this topic.. i couldn't find any)..
e.g. i want to change all the occurences of char XXX[] to const char* XXX
it would be something like
char(.*)?\[\] (at least as much as i know)
now i would have to replace this with const char* $1
how to do this with the find / replace dialog.

would be very handy if it worked..

bernhard

"I'm from the South Bronx, and I don't care what you say: those cows look dangerous."
U.S. Secretary of State Colin Powell at George Bush's ranch in Texas

Re: Visual Studio 6.0

Ryan Binns30-Jun-03 2:27

Ryan Binns

30-Jun-03 2:27

Find: char $.*$\[\]
Replace: const char *\1

Ryan

Being little and getting pushed around by big guys all my life I guess I compensate by pushing electrons and holes around. What a bully I am, but I do enjoy making subatomic particles hop at my bidding - Roger Wright (2^nd April 2003, The Lounge)

Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late - John Nichol "Point Of Impact"

Got problems with COptionTree

mike :D30-Jun-03 0:16

mike :D

30-Jun-03 0:16

Hi!
I tryed to use http://www.codeproject.com/treectrl/coptiontree.asp
During the compilation i got following error

MainFrm.obj : error LNK2001: unresolved external symbol Symbol "public: virtual __thiscall COptionTree::~COptionTree(void)" (??1COptionTree@@UAE@XZ)
MainFrm.obj : error LNK2001: unresolved external symbol "public: __thiscall COptionTree::COptionTree(void)" (??0COptionTree@@QAE@XZ)
MainFrm.obj : error LNK2001: unresolved external symbol "public: int __thiscall COptionTree::Create(unsigned long,struct tagRECT,class CWnd *,unsigned long,unsigned int)" (?Create@COptionTree@@QAEHKUtagRECT@@PAVCWnd@@KI@Z)

I've added the lib from COptionTree in my Project and put the DLL in my Debug folder.
What have i done wrong?
Thx mike

Re: Got problems with COptionTree

Dominik Reichl30-Jun-03 0:41

Dominik Reichl

30-Jun-03 0:41

Do you include the header file for the lib?

-Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??

Re: Got problems with COptionTree

mike :D30-Jun-03 2:00

mike :D

30-Jun-03 2:00

Hi!
Yes, I have added #include "OptionTree.h" to my *.h were the Instance of COptionTree is declared.

mike

Re: Got problems with COptionTree

mike :D30-Jun-03 4:01

mike :D

30-Jun-03 4:01

Hi!
Where can i get a sample build with a DLL? Can somebody send it to me?
pleeaazzze Smile | :)

mvodep@gmx.net

thx mike

about disable or enable Network card

BensonCHUANG30-Jun-03 0:06

BensonCHUANG

30-Jun-03 0:06

hi..
Please tell me How disable or enable a NIC using MFC class.
like on widows system to double-click My Computer, Control Panel, and System.
then Click the Hardware tab and Device Manager.
Under Network Adapters, desable or enable the Network card.
can u help me?!

thank a lot.
Confused | :confused:

/neil

SADAS

Disassembler for IBM PC (SoftIce)

BhaskarBora29-Jun-03 23:45

BhaskarBora

29-Jun-03 23:45

Can anyone tell me where can I find a dis-assembler for pc? I have heard of a popular software called SoftIce. If any one can tell me about SoftIce then it would be great ! thanks in advance

___________________________
When a thing is new, people say, "It's not true." Later, when its truth becomes obvious, people say, "It's not important." Finally, when its importance cannot be denied, people say, "Well, it's not new."

Re: Disassembler for IBM PC (SoftIce)

Dominik Reichl30-Jun-03 0:47

Dominik Reichl

30-Jun-03 0:47

I personally use OllyDbg (http://home.t-online.de/home/Ollydbg/[^]). This is a debugger including a disassembler.

SoftIce is indeed better than OllyDbg, but it isn't free. You can purchase it here for example: http://www.microway.com.au/compuware/softice.stm[^]

-Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??

Re: Disassembler for IBM PC (SoftIce)

BhaskarBora30-Jun-03 2:49

BhaskarBora

30-Jun-03 2:49

i want to debug .COM file also..
can we use OllyDbg for that too?
___________________________
When a thing is new, people say, "It's not true." Later, when its truth becomes obvious, people say, "It's not important." Finally, when its importance cannot be denied, people say, "Well, it's not new."

CreateService() Hangs

vlvl29-Jun-03 23:42

vlvl

29-Jun-03 23:42

Hi, I have a Small service which installs and runs fine on most machine, yet on some machines, when I try to install the service, using the CreateService() API function, the function hangs and I need to kill to process manually.

Any ideas?

Problem about "SetTimer" function

TERRY_LUK200329-Jun-03 23:17

TERRY_LUK2003

29-Jun-03 23:17

Who knows why I can't type through Keyboard in dialog box after calling SetTimer function of CWnd object? I need to kill the timer everytime when the dialog box pop up for allow users to enter the data... it is very inconvenience...Please help...
Thank you.

Terry

Re: Problem about "SetTimer" function

Dominik Reichl30-Jun-03 0:50

Dominik Reichl

30-Jun-03 0:50

Perhaps you could post the code what you are doing in the timer function?

Make sure you don't call any UpdateData(FALSE) without UpdateData(TRUE) in your timer function. Also make sure you don't disable, enable, or focus another control in the timer function.

-Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??

Ras connection statistics

no_body6929-Jun-03 23:02

no_body69

29-Jun-03 23:02

hi,
i need dial up connection statistics (speed, send & received bytes etc.). i try to use RasGetConnectionStatistics function. it shows an error (RasGetConnectionStatistics' : undeclared identifier) but i include <ras.h>.

If do you know the solution, please help me.

Re: Ras connection statistics

Dominik Reichl30-Jun-03 0:54

Dominik Reichl

30-Jun-03 0:54

Include file ras.h and link to rasapi32.lib.

You know that this function only works on Windows XP, Windows 2000 Professional, Windows Server 2003 and Windows 2000 Server, or?...

On Win95, Win98, WinME and WinNT this function won't work.

-Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??

Re: Ras connection statistics

no_body6930-Jun-03 1:01

no_body69

30-Jun-03 1:01

yes, i Include ras.h and link to rasapi32.lib.
also i know that it doesn't work in win95/98/me.

do you have any solution?
Please tall me.

How To Create a Non Rectangular Control

Vikrant Vikrant29-Jun-03 21:48

Vikrant Vikrant

29-Jun-03 21:48

Hey Friends
I wish to Create a control just like Shape Control available in Visual Basic.It will be possible to Change its Shape and relocate to some other location.It should be visible properly.
I Tried Inheriting a Class From CWnd and Providing Body to OnPaint But the areas which i do not paint do not get updated and show the Background which looks Bad.
Pl Suggest.Will Regions Solve the Problem ?
Sample Code
void CShapeCtrl::OnPaint()
{
CPaintDC dc(this); // device context for painting
CRect rRect;
CBrush br;
GetClientRect(&rRect);
br.CreateSolidBrush(RGB(255,0,0));
dc.Rectangle(&rRect);
if(!m_bShapeSet)
{
HRGN hRgn;
rRect.DeflateRect(5,5);
hRgn = ::CreateEllipticRgnIndirect(&rRect);
SetWindowRgn(hRgn,TRUE);
m_bShapeSet = TRUE;
}
}

Re: How To Create a Non Rectangular Control

Ryan Binns29-Jun-03 23:29

Ryan Binns

29-Jun-03 23:29

You need to call SetWindowRgn() in OnCreate(), and whenever the shape changes, not each call to OnPaint(). If it still updates incorrectly (although it should work), then try setting the WS_EX_TRANSPARENT extended style for the control.

Hope this helps,

Ryan

Being little and getting pushed around by big guys all my life I guess I compensate by pushing electrons and holes around. What a bully I am, but I do enjoy making subatomic particles hop at my bidding - Roger Wright (2^nd April 2003, The Lounge)

Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late - John Nichol "Point Of Impact"

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