Re: Macintosh and MFC - C / C++ / MFC Discussion Boards

Re: How to Terminate a running App and start a new instance of the same App?

ThatsAlok24-Jan-05 7:11

24-Jan-05 7:11

Hi There!
look at these article tehy will help you out as you exact term use for your problem is Single Instance APP

http://www.codeproject.com/cpp/csingleinst.asp
http://www.codeproject.com/threads/singleinstance.asp
http://www.codeproject.com/threads/simplesingleinstanceapp.asp

"I Think this Will Help"
<h5
alok="" gupta="" <br=""> visit me at http://www.thisisalok.tk

Re: How to Terminate a running App and start a new instance of the same App?

nonothing24-Jan-05 11:32

nonothing

24-Jan-05 11:32

Thanks for the info...I give a try and keep you posted!

Re: How to Terminate a running App and start a new instance of the same App?

ThatsAlok24-Jan-05 17:54

ThatsAlok

24-Jan-05 17:54

No Problem Smile | :)

"I Think this Will Help"
<h5
alok gupta="" <br=""> visit me at http://www.thisisalok.tk

Display Raw Image on the fly

jazzkiller24-Jan-05 5:02

jazzkiller

24-Jan-05 5:02

Hi all,
I am capturing an image through a camera. The camera returns a pointer to a two dimensional array of pixels. How can I go about displaying these pixels into MFC? (Just like a webcam or a camera with an LCD does)

I have read tutorials on displaying .bmp using CBitmap ... However, will MFC understands the raw image file (no header, each pixel has 8bit grayscale).

I appreciate all of your help.

Thanks,
Beou

Re: Display Raw Image on the fly

basementman24-Jan-05 6:12

basementman

24-Jan-05 6:12

See SetBitmapBits or SetDIBits.

onwards and upwards...

Macintosh and MFC

includeh1024-Jan-05 4:58

includeh10

24-Jan-05 4:58

can a MFC program be simply re-compiled or slightly modified from Windows OS to Macintosh OS to generated exe file for Macintosh?

includeh10

Re: Macintosh and MFC

David Crow24-Jan-05 5:16

David Crow

24-Jan-05 5:16

There used to be a version of MFC for that platform. I do not know if that is still the case, however. Check Microsoft's site.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: Macintosh and MFC

Michael P Butler24-Jan-05 5:35

Michael P Butler

24-Jan-05 5:35

There used to be an extension for Visual C++ that did this, but Microsoft long since dis-continued it. I think VC4 was the last version it worked in.

Microsoft Visual C++ 4.0 Cross-Development Edition for Macintosh[^]

All I remember was it was expensive and didn't live up to expectations.

Michael

CP Blog [^] Development Blog [^]

Re: Macintosh and MFC

Antony M Kancidrowski25-Jan-05 0:51

Antony M Kancidrowski

25-Jan-05 0:51

Michael P Butler wrote:
it was expensive and didn't live up to expectations

You can say that again!

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

an array of dynamically allocated objects

student_ben24-Jan-05 4:54

student_ben

24-Jan-05 4:54

whats wrong with the following code?

Curve curveObjects[10];
Curve *pcurveObjects;
pcurveObjects = &curveObjects[0];

I get the error messages:
....conflicting types for `int pcurveObjects'
....previous declaration as `Curve*pcurveObjects'

i can't see where i've defined anything as an int, can anyone explain why this is the case?

Re: an array of dynamically allocated objects

David Crow24-Jan-05 5:19

David Crow

24-Jan-05 5:19

Your code is syntactically correct. What does the declaration of Curve look like?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

API to wireless device configuration

MoZ24-Jan-05 4:35

MoZ

24-Jan-05 4:35

Can someone point me in the right direction to find API for 802.11. I want to create an application to retreive/change the WEP key(s) of a wireless device via 802.11b in Visual C++. Is there a generic set of API's? Sigh | :sigh:

Moz
Tunis - Tunisia

Re: API to wireless device configuration

geo_m24-Jan-05 6:19

geo_m

24-Jan-05 6:19

Never did it before, but might be, that IProvisioningProfileWireless::CreateProfile can help you as a search string in MSDN.

Re: API to wireless device configuration

MoZ24-Jan-05 20:19

MoZ

24-Jan-05 20:19

Thank you,
I will look.

Moz
Tunis - Tunisia

cast from CString to char [MAX_PATH]

madretierra24-Jan-05 3:02

madretierra

24-Jan-05 3:02

Hello,

i have an ip adress in CString format and I need to transform it in char [MAX_PATH] format ...

Does anybody have an idea how to do that ?

Thanks a lot for help and have a nice day !

There is no way to happiness, happiness is the way !

Re: cast from CString to char [MAX_PATH]

James R. Twine24-Jan-05 3:49

James R. Twine

24-Jan-05 3:49

You do not transform from a CString to a char array, but you can copy one to the other:

<br />
    CString sTheIP( "192.168.0.1" );<br />
    char    caCharArray[ _MAX_PATH + 1 ];<br />
<br />
    ::strncpy( caCharArray, sTheIP, _MAX_PATH );<br />
    caCharArray[ _MAX_PATH ] = '\0';<br />

If whatever you need to pass the char array to only needs a const char * (LPCSTR), you can pass the CString directly; it has an operator for const TCHAR *.

Peace!

-=- James
Tip for inexperienced drivers: "Professional Driver on Closed Course" does not mean "your Dumb Ass on a Public Road"!
Articles -- Products: Delete FXP Files & Check Favorites

Re: cast from CString to char [MAX_PATH]

madretierra24-Jan-05 5:10

madretierra

24-Jan-05 5:10

A thousand of thanks James !

It works fine and your help is a jewel, thank you very much !

alain costanza

There is no way to happiness, happiness is the way !

LockWindowUpdate - BUG ???

Danoo24-Jan-05 1:42

Danoo

24-Jan-05 1:42

Hi y'all

I used LockWindowUpdate to prevent my CListCtrl and CTreeCtrl from redrawing while the whole items were repopulated. It works fine, except that upon unlocking the whole desktop and all its child windows receive WM_PAINT messages...
I thought that only this mechanism operates only on the locked window... anyway, when I remove the LockWindowUpdate lines in my code, only my controls are flickering, the rest of the desktop remains untouched...

All this seems very strange to me...

Anybody else had similar experiences?

Regards
Daniel

Re: LockWindowUpdate - BUG ???

Tim Smith24-Jan-05 1:57

Tim Smith

24-Jan-05 1:57

Use WM_SETREDRAW. LockWindowUpdate is a nasty call that causes is lot of problems if not used properly.

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

Re: LockWindowUpdate - BUG ???

Danoo24-Jan-05 2:29

Danoo

24-Jan-05 2:29

Thanks for your suggestion. I tried it, and it seems to me that SetRedraw is not implemented for all controls. I'm using a CListCtrl and according to the MSDN doc they talk about CListBox in their examples...

Is there any other alternative?
Or what is the proper way of using LockWindowUpdate? It would work exacly how I want it to, except that the all open application windows receive WM_PAINT messages... Frown | :(

Re: LockWindowUpdate - BUG ???

Joel Lucsy24-Jan-05 2:58

Joel Lucsy

24-Jan-05 2:58

WM_SETREDRAW works for CListCtrl. I've used it. Avoid LockWindowUpdate like the plague.

--
Joel Lucsy

Re: LockWindowUpdate - BUG ???

RChin24-Jan-05 4:14

RChin

24-Jan-05 4:14

Have a look at the docs for SetRedraw()[^].
It has a brief example for your CListCtrl class.
Being a CWnd derived function, it should also work for any CWnd derived controls.

I Dream of Absolute Zero

Re: LockWindowUpdate - BUG ???

Tim Smith24-Jan-05 4:21

Tim Smith

24-Jan-05 4:21

If it doesn't work, then your code has other bugs in it. I know that doesn't really help you out a lot, but time and time again I see people waste time trying to figure out why the operating system isn't working when it turns out that our code just has a simple bug.

I'm not bitching at you or saying you are a bad programmer. We all do it. I recently wasted two hours trying to figure out why MFC's wait cursor wasn't working when it turned out I just forgot to specify a variable name.

i.e.

CWaitCursor;

instead of

CWaitCursor waitCursor;

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

std::out_of_range

Anonymous24-Jan-05 1:11

Anonymous

24-Jan-05 1:11

Hi,
I get this runtime error
Unhandled exception at 0x7c59bbf3 in NewMumsEngine.exe: Microsoft C++ exception: std::out_of_range @ 0x016c605c.

when I try to execute this line

sVarData = m_pElement[iPos].sValue.substr(iIndex+1);
where
sVarData is of string type.
m_pElement[iPos] is an object of a structure
sValue is another string variable in the same structure.

Can anyone please explain this error to me and tell me how to remove it.Any suggestions please?

thanks,
Arjun.

Re: std::out_of_range

Mike Dimmick24-Jan-05 1:23

Mike Dimmick

24-Jan-05 1:23

You don't say what type m_pElement is but I presume it's a pointer to a C-style array. I'd therefore guess that iIndex + 1 is greater than the length of sValue, assuming that sValue is a std::string.

You probably need to check that iIndex is less than the length of sValue before performing this operation.

Stability. What an interesting concept. -- Chris Maunder

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