C / C++ / MFC Discussion Boards

Re: Problem Converting CString to WCHAR

Rajesh R Subramanian3-Mar-10 0:28

Rajesh R Subramanian

3-Mar-10 0:28

If CString is already available for use in your project, why are you using error prone C-Style string?

“Follow your bliss.” – Joseph Campbell

Re: Problem Converting CString to WCHAR

CPallini3-Mar-10 0:31

CPallini

3-Mar-10 0:31

TheFox wrote:
const WCHAR *c = (const WCHAR *)(LPCTSTR)text_filename;

Assuming you're doing a ANSI build (not UNICODE), the above line is wrong. You should convert the ANSI string to a wide character one, for instance using MultiByteToWideChar [^] function (an example of usage here [^]).
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Problem Converting CString to WCHAR

TheFox3-Mar-10 2:32

TheFox

3-Mar-10 2:32

Thanks for your help.
I got it working.

Re: Problem Converting CString to WCHAR

CPallini3-Mar-10 3:27

CPallini

3-Mar-10 3:27

You are welcome.
Smile | :)

Re: Problem Converting CString to WCHAR

KarstenK3-Mar-10 1:26

KarstenK

3-Mar-10 1:26

your string is sh*t. When i see this code:

CString text_filename;
text_filename = "c:\\text.txt";
const WCHAR *c = (const WCHAR *)(LPCTSTR)text_filename;

you dont know what you are doing. Sorry but it is the truth D'Oh! | :doh:

CString text_filename = TEXT("c:\\text.txt");

plz learn the basics before doing COM Thumbs Up | :thumbsup:

Press F1 for help or google it.
Greetings from Germany

Re: Problem Converting CString to WCHAR

TheFox3-Mar-10 1:37

TheFox

3-Mar-10 1:37

You are right I am Pi**ing in the wind.

Can you reccomend any books / websites where I can learn COM?

Re: Problem Converting CString to WCHAR

KarstenK3-Mar-10 1:46

KarstenK

3-Mar-10 1:46

this an old book from the famous and legendary Don Box which any of your buddies could have:

http://www.amazon.com/Essential-COM-Don-Box/dp/0201634465/ref=pd_sim_b_1[^]

this one from him looks moderner and better:

http://www.amazon.com/Effective-COM-Improve-MTS-based-Applications/dp/0201379686/ref=pd_sim_b_4[^]

this one should i read Blush | :O

Press F1 for help or google it.
Greetings from Germany

Re: Problem Converting CString to WCHAR

KingsGambit3-Mar-10 7:16

KingsGambit

3-Mar-10 7:16

'Inside COM' would be a good book to start with.
http://www.amazon.com/Inside-Microsoft-Programming-Dale-Rogerson/dp/1572313498[^]

Re: Problem Converting CString to WCHAR

CPallini3-Mar-10 1:38

CPallini

3-Mar-10 1:38

KarstenK wrote:
CString text_filename = TEXT("c:\\text.txt");

That will not change much, if his project isn't UNICODE.
Smile | :)

Re: Problem Converting CString to WCHAR

KarstenK3-Mar-10 2:04

KarstenK

3-Mar-10 2:04

for COM he will need Unicode strings or it will crash. It is the cause of his trouble. D'Oh! | :doh:

Press F1 for help or google it.
Greetings from Germany

Re: Problem Converting CString to WCHAR

CPallini3-Mar-10 2:17

CPallini

3-Mar-10 2:17

That's true of course.
But still your solution is not valid if the application is a ANSI build (i.e. UNICODE is not defined) and yes, you may use COM with a ANSI built application, provided you explicitely convert strings.
Smile | :)

Re: Problem Converting CString to WCHAR

KarstenK3-Mar-10 2:37

KarstenK

3-Mar-10 2:37

CString text_filename = TEXT("c:\\text.txt");

works fines on ANSI and UNICODE.

I prefer buildind Unicode, because COM can be easier used. So my code is Unicode compilable.

I also like the CStringW class for COM in ANSI projects Blush | :O

Press F1 for help or google it.
Greetings from Germany

Re: Problem Converting CString to WCHAR

CPallini3-Mar-10 2:49

CPallini

3-Mar-10 2:49

KarstenK wrote:
CString text_filename = TEXT("c:\\text.txt");
works fines on ANSI and UNICODE.

Indeed. But it doesn't automagically convert a ANSI string to a wide char one. That's why I said it wouldn't help him on a ANSI build.
Smile | :)

Re: Problem Converting CString to WCHAR

Eugen Podsypalnikov3-Mar-10 1:28

Eugen Podsypalnikov

3-Mar-10 1:28

If you have a non unicode project
you could take the A2W macro too Smile | :)

Check your definition of Irrationality[^] Smile | :)

1 - Avicenna
5 - Hubbard
3 - Own definition

Re: Problem Converting CString to WCHAR

TheFox3-Mar-10 2:33

TheFox

3-Mar-10 2:33

Thanks for everyones help.
I got it working.

CPU Usage

john56322-Mar-10 23:18

john5632

2-Mar-10 23:18

Hi,

How to get CPU usage of a spacific process?

Re: CPU Usage

Stephen Hewitt2-Mar-10 23:27

Stephen Hewitt

2-Mar-10 23:27

I suggest you Google it.

Steve

Re: CPU Usage

Luc Pattyn3-Mar-10 2:03

Luc Pattyn

3-Mar-10 2:03

Does google know what my CPU is doing? OMG | :OMG:

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly formatted, adding PRE tags is the easiest way to obtain that.

Re: CPU Usage

Cedric Moonen3-Mar-10 2:24

Cedric Moonen

3-Mar-10 2:24

Well, with Google you never know Smile | :)

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Re: CPU Usage

Rajesh R Subramanian2-Mar-10 23:32

Rajesh R Subramanian

2-Mar-10 23:32

I'd recommend what Stephen suggested. It looks promising.

“Follow your bliss.” – Joseph Campbell

Re: CPU Usage

Adam Roderick J2-Mar-10 23:37

Adam Roderick J

2-Mar-10 23:37

I wish u had just checked in codeproject, since there is already a article related to it How to get CPU usage by performance counters (without PDH)[^] Smile | :)

Величие не Бога может быть недооценена.

modified on Wednesday, March 3, 2010 5:51 AM

Re: CPU Usage

CPallini3-Mar-10 0:06

CPallini

3-Mar-10 0:06

I recommend the Rajesh's suggestion, looks good. Big Grin | :-D

Re: CPU Usage

Moak3-Mar-10 1:55

Moak

3-Mar-10 1:55

Pallini is absolutely right!

Webchat in Europe Java | [Coffee]

(only 4K)

Re: CPU Usage

David Crow3-Mar-10 3:06

David Crow

3-Mar-10 3:06

See here.

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Man who follows car will be exhausted." - Confucius

to change user name of windows

zon_cpp2-Mar-10 23:15

zon_cpp

2-Mar-10 23:15

hi,
how do i change the user name of windows? (with a VC code)
thanks

Zo.Naderi-Iran

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.