C / C++ / MFC Discussion Boards

VikramDelhi16-Dec-05 4:51

16-Dec-05 4:51

well if i am to code a project on net. then i'll go for SMTP server( it can be a smtp server for newsletter kind od app)or FTP server or something similar to it.

Re: Networking

ThatsAlok16-Dec-05 21:58

ThatsAlok

16-Dec-05 21:58

vcforums wrote:
if you suggest good topic for networking project kindly give me a reply.

What about making NETWORK ShutDowner

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

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

CString and STL's string

Putta_V16-Dec-05 0:22

Putta_V

16-Dec-05 0:22

Hi All,

I have been using CString for years and was very much comfortable with it.
Now i am using STL's string.
while debugging i am not able to get the value of a string variable.it shows the address and not the value(string::c_str).
if it was a CString variable, just by putting the variable in the Quick Watch i was able to see its contents.
How do i get the value of a string variable during debugging ?

Thanks in advance

Re: CString and STL's string

David Crow16-Dec-05 2:48

David Crow

16-Dec-05 2:48

It almost sounds like you need to add an entry to your autoexp.dat file. You'd see the same thing with CString if it weren't for that file.

"Take only what you need and leave the land as you found it." - Native American Proverb

Re: CString and STL's string

Rage16-Dec-05 4:27

Rage

16-Dec-05 4:27

Hi David,,

I'd be very interested to know what you exactely mean with your answer. I thought there was no (easy) way to see the content of stl strings while debugging... What is autoexp.dat ?

~RaGE();

Re: CString and STL's string

David Crow16-Dec-05 4:38

David Crow

16-Dec-05 4:38

Rage wrote:
I thought there was no (easy) way to see the content of stl strings while debugging

I don't use STL, so that may very well be the case.

Rage wrote:
What is autoexp.dat ?

It's a file located in the C:\Program Files\Microsoft Visual Studio\Common\MSDev98\Bin folder. There is a good description at the top of it.

"Take only what you need and leave the land as you found it." - Native American Proverb

Re: CString and STL's string

Rage20-Dec-05 6:34

Rage

20-Dec-05 6:34

DavidCrow wrote:

It's a file located in the C:\Program Files\Microsoft Visual Studio\Common\MSDev98\Bin folder. There is a good description at the top of it.

This is very interesting, thank you David, for the explanation. Cool | :cool:

~RaGE();

Re: CString and STL's string

Rage16-Dec-05 4:24

Rage

16-Dec-05 4:24

Could this be of any help :

Article[^]

~RaGE();

open a default fil by using the CFileDialog class

vikas amin16-Dec-05 0:16

vikas amin

16-Dec-05 0:16

How to open a default fil by using the CFileDialog class
I open the dialog box like this .
I want to keep one file as default selection

CFileDialog dlg(TRUE,"bmp",NULL,OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,"Only BMP (*.bmp)|*.bmp|");
dlg.DoModal ();

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Re: open a default fil by using the CFileDialog class

Russell^'16-Dec-05 0:26

Russell^'

16-Dec-05 0:26

Use

<br />
dlg.m_ofn.lpstrFile=TEXT("DefaultFile.xxx");<br />

before DoModal()

Have a nice code day Wink | ;)

Re: open a default fil by using the CFileDialog class

vikas amin16-Dec-05 1:31

vikas amin

16-Dec-05 1:31

I need to open a file named "1.bmp" located as "c:\1.bmp"

but i get assertion for invalid address

ASSERT(AfxIsValidAddress(m_ofn.lpstrFile, m_ofn.nMaxFile));

My code is somthing like this :--------

CFileDialog dlg(TRUE,"bmp",NULL,OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,"Only BMP (*.bmp)|*.bmp|");<br />
<br />
dlg.m_ofn.lpstrFile=TEXT("c:\\1.bmp");<br />
<br />
dlg.DoModal ();

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Re: open a default fil by using the CFileDialog class

Russell^'16-Dec-05 2:02

Russell^'

16-Dec-05 2:02

sorry (error),
now try with this:

<br />
TCHAR str[100]=TEXT("c:\\1.bmp");<br />
dlg.m_ofn.lpstrFile=str;<br />

Have a nice code day Wink | ;)

Re: open a default fil by using the CFileDialog class

vikas amin16-Dec-05 2:29

vikas amin

16-Dec-05 2:29

sorry there is some problem in the given code also

some assertion at

ASSERT(m_hFile != (UINT)hFileNull);

I thing will have to go through the sturctre method
i found some links will try from it

http://eatworms.swmed.edu/~boris/B_Player/VideoWnd.cpp
http://www.codeproject.com/dialog/remove_filters.asp

Why simpe things are done so complicated in VC++

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Re: open a default fil by using the CFileDialog class

Russell^'16-Dec-05 2:52

Russell^'

16-Dec-05 2:52

I don't know, it is strange! Frown | :(

A good thing could be add the flag OFN_FILEMUSTEXIST here:
CFileDialog dlg(TRUE,"bmp",NULL,OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,"Only BMP (*.bmp)|*.bmp|");

So you are sure that the file exist.

And I don't like very much
...,"Only BMP (*.bmp)|*.bmp|"
I prefere
...,"Only BMP (*.bmp)|*.bmp||"

Let me know

Have a nice code day Wink | ;)

Re: open a default fil by using the CFileDialog class

vikas amin16-Dec-05 3:41

vikas amin

16-Dec-05 3:41

I will have to get the exact error if u have tested the code
so u might be right ,
can be some error in my code .

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Re: open a default fil by using the CFileDialog class

David Crow16-Dec-05 4:50

David Crow

16-Dec-05 4:50

_Russell_ wrote:
dlg.m_ofn.lpstrFile=str;

If lpstrFile is assigned a non-NULL value, so must nMaxFile also be used to indicate the size of the buffer pointed to by lpstrFile.

Why do it this way, however, when the constructor already has provisions for such?

"Take only what you need and leave the land as you found it." - Native American Proverb

Re: open a default fil by using the CFileDialog class

David Crow16-Dec-05 2:52

David Crow

16-Dec-05 2:52

vikas amin wrote:
How to open a default fil by using the CFileDialog class

That is what the third parameter of CFileDialog's constructor is for.

vikas amin wrote:
I need to open a file named "1.bmp" located as "c:\1.bmp"

Then why bother with CFileDialog if you already know the name of the file?

Also, the filter should end with two ‘|’ characters.

"Take only what you need and leave the land as you found it." - Native American Proverb

Re: open a default fil by using the CFileDialog class

VikramDelhi16-Dec-05 3:29

VikramDelhi

16-Dec-05 3:29

yep if he knows filename & location then why he is using CFileDialog .
well i guess he wants to show his skills here.;)

Re: open a default fil by using the CFileDialog class

vikas amin16-Dec-05 3:40

vikas amin

16-Dec-05 3:40

vikas amin wrote:
I need to open a file named "1.bmp" located as "c:\1.bmp"

Then why bother with CFileDialog if you already know the name of the file?

Yeh good qestion , i need this only for Testing purpose &
when i cannot reach some thing in coding
it makes me crazy to get it done .

Cool | :cool:

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

i'm dumb

Smith#15-Dec-05 23:57

Smith#

15-Dec-05 23:57

please tell me what's a callback function? Frown | :(

i've read it many times but i'm understanding it. whats the differnce between CallBack function and a normal function. please dont give a link. which i'm not going to understand. instead explain me.. with a little example. pleeeeeez Frown | :(

regards,
Rookie
Installing MFC...2% complete

Re: i'm dumb

Russell^'16-Dec-05 0:16

Russell^'

16-Dec-05 0:16

A callback function is a normal function that the system calls when comes specified events.
An event could be a mouse click, or a tollbar botton click, ....
To link the event to the function it is used the MESSAGE_MAP
(usually in this macros are used the IDs of the objects that the user is using)

is it OK?

Have a nice code day Wink | ;)

Re: i'm dumb

Smith#16-Dec-05 0:29

Smith#

16-Dec-05 0:29

fisrt of all thanks for your patience,
for the first time i think i've understood whats a callback.
See here

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg,WPARAM wParam, LPARAM lParam)

as i've read,WndProc processes all the messages send by the applications. right? so a message "coming" makes an event which inturn calls this CALLBACK wndProc right? am i right?

regards,
Rookie
Installing MFC...2% complete

Re: i'm dumb

Russell^'16-Dec-05 0:33

Russell^'

16-Dec-05 0:33