Re: Getting Hex value from Edit box ? - C / C++ / MFC Discussion Boards

kk_vp31-Jan-06 0:11

31-Jan-06 0:11

Thank you for your time, although I was looking for help from someone who can give easy to follow help for beginers too !

- KK

Re: Getting Hex value from Edit box ?

Owner drawn31-Jan-06 0:14

Owner drawn

31-Jan-06 0:14

There are hordes of articles in CP related to CEdit. Just search for them trust me you won't be disappointed.

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Re: Getting Hex value from Edit box ?

David Crow31-Jan-06 4:06

David Crow

31-Jan-06 4:06

kk_vp wrote:
It validates the user entry and makes sure that user enters valid hex code...

Actually it says it will do that but it is missing several key points.

kk_vp wrote:
...It does not have a member variable which can give me hex value.

What do you mean by this?

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

Re: Getting Hex value from Edit box ?

toxcct31-Jan-06 0:34

toxcct

31-Jan-06 0:34

there's no particuliar type to store hexadecimal values.
the answers of Owner Drawn are good enough. if you'r not satisfied, please detail the points you need help on, because nobody will do the whole job for you...

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VCalc 3.0 soon...]

-- modified at 8:09 Tuesday 31st January, 2006

Re: Getting Hex value from Edit box ?

Owner drawn31-Jan-06 1:07

Owner drawn

31-Jan-06 1:07

toxcct wrote:
owern drawn

The Name is Owner Drawn. Rose | [Rose]

Jesus Lives Forever - Amen Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="10" step=".5" scrollamount="1" style="background:#99ccff;border-bottom:thin solid 1px #6699cc">
--Owner drawn Rose | [Rose]

--An eye for an eye makes the whole world blind.
--If you find my post helpful then do rate it.
--Jesus is Lord Rose | [Rose]

Re: Getting Hex value from Edit box ?

toxcct31-Jan-06 2:09

toxcct

31-Jan-06 2:09

writing mistake...

fixed Rose | [Rose]

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VCalc 3.0 soon...]

Re: Getting Hex value from Edit box ?

Eytukan31-Jan-06 3:11

Eytukan

31-Jan-06 3:11

Dont worry tox, Owern Darwn is a cool guy, he wont mind Wink | ;)

VuNic

Re: Getting Hex value from Edit box ?

Owner drawn31-Jan-06 16:43

Owner drawn

31-Jan-06 16:43

VuNic wrote:
Owern Darwn is a cool guy

That's not me Sigh | :sigh:

. The name is Owner drawn. Big Grin | :-D

Jesus Lives Forever - Amen Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="10" step=".5" scrollamount="1" style="background:#99ccff;border-bottom:thin solid 1px #6699cc">
--Owner drawn Rose | [Rose]

--An eye for an eye makes the whole world blind.
--If you find my post helpful then do rate it.
--Jesus is Lord Rose | [Rose]

Re: Getting Hex value from Edit box ?

sheshidar31-Jan-06 7:20

sheshidar

31-Jan-06 7:20

how you use this Hexa numbers, in ur program

Re: Getting Hex value from Edit box ?

sheshidar31-Jan-06 9:56

sheshidar

31-Jan-06 9:56

I like to say that better give CString for member variable. How you use this Hexa numbers in ur code?? will you use bthem as hexa numbers or convert them as decimal numbers?

Re: Getting Hex value from Edit box ?

kk_vp9-Feb-06 22:41

kk_vp

9-Feb-06 22:41

hi all,
sorry for this late reply. got in to something else.
I got it working.

the input required from edit box is hex value.
since this has a , b etc a value of type int does not work.
so as mentioned by one of you, I used value type string.
and then converted string to hex value using
sscanf(temp,"%x",&value);

now value has hex what ever user entered.

I still have a problem.

I need a 6 byte hex number from user in some cases.

so the 'value' is UCHAR[6] for that case.
for such big values, this is not working. I get some junk values after conversion.

Another thing,
I usually use messagebox to check intermediate values. but with CHAR[6] containing a hex value how do I make it to string and pass to mesagebox..

I hope I am clear and I'll get some help.

- KK

Getting the mime / content type of an http document

Jagadeesh VN30-Jan-06 23:01

Jagadeesh VN

30-Jan-06 23:01

Hi,

Is there any way I can get the actual content type of a URL without downloading the file completely ?

1. I tried CHttpFile::QueryInfo with HTTP_QUERY_CONTENT_TYPE, But for that to work, I must call SendRequest, which will download the complete file.

2. I tried FindMimeFromData(...) with Url option, But its not even connecting to the internet to get the Mime type, instead I believe it checks only in the url. Sometimes the url may not be having any information about this and the server might set the mime type, so I need a method which will download only the Http response header and extract this information.

Thanks
Jugs

"A robust program is resistant to errors -- it either works correctly, or it does not work at all; whereas a fault tolerant program must actually recover from errors."

Re: Getting the mime / content type of an http document

Stephen Hewitt30-Jan-06 23:17

Stephen Hewitt

30-Jan-06 23:17

You could ask the server - The response of a HTTP request gives the MIME type. To see what I'm talking about try this:

1. Open a command prompt and enter "telnet www.thecodeproject.com 80".
2. Now type the following, exactly (you will not be able to see what you're typing - The blank line at the end is important):

HEAD /images/standard/logotop.gif HTTP/1.1
Host: www.thecodeproject.com

The response from the server will indicate the content type (see the "Content-Type" header field).

I'm not saying you have to do all this manually at the socket level (although to do so would not be hard), but if you can figure out how to send a HTTP "HEAD" request to the server and read the response using whatever framework or API you're into you should be able to do it.

Steve

Re: Getting the mime / content type of an http document

Jagadeesh VN31-Jan-06 20:23

Jagadeesh VN

31-Jan-06 20:23

Hi Steve,

That was indeed very helpful. I used plain sockets and got this to work.

Thanks a TON!!!

Jugs

"A robust program is resistant to errors -- it either works correctly, or it does not work at all; whereas a fault tolerant program must actually recover from errors."

Hook file access

Tschieses30-Jan-06 22:37

Tschieses

30-Jan-06 22:37

Hi everybody,

I'm looking for a possibility to monitor file access via a windows hook
but couldn't find anything on the MSDN page.
Isn't it possible to monitor and modify file open, read, write and close events?

Please help.

Re: Hook file access

Stephen Hewitt30-Jan-06 22:52

Stephen Hewitt

30-Jan-06 22:52

There are various techniques ranging from kernel patching, user mode API hooking, filter drivers, etc. Which you choose would depend on the scope of the hook - is it just one process or the system as a whole?

Steve

Re: Hook file access

Tschieses30-Jan-06 23:04

Tschieses

30-Jan-06 23:04

I only want to control file access from a single application.
Every time the app want to read from a file on disk it should provide the data from within a encrypted archive.

Re: Hook file access

Stephen Hewitt30-Jan-06 23:45

Stephen Hewitt

30-Jan-06 23:45

There are two common ways to hook an API for a single application, IAT patching and binary re-writting or the target. IAT patching will only effect one module (DLL or EXE) binary re-writting the target will effect the entire process. Look up these terms and check out the Detours library from Microsoft.

Steve

Re: Hook file access

Tschieses31-Jan-06 0:07

Tschieses

31-Jan-06 0:07

Thanks alot.
I will have a look on it.

Re: Hook file access

Chintoo72331-Jan-06 0:11

Chintoo723

31-Jan-06 0:11

Giving the number of bad things that can happen with api hooking, do you know if microsoft has any plans to do something to prevent api hooking?

thanks!

Re: Hook file access

Stephen Hewitt31-Jan-06 11:18

Stephen Hewitt

31-Jan-06 11:18

I believe 64 bit Windows has measures to prevent kernel patching. Click here[^] for details.

Steve

Problem in scrolling

Anu_Bala30-Jan-06 22:19

Anu_Bala

30-Jan-06 22:19

Im making a program that uses a listbox as its message window.Iam reading content for this control from one of my file.Dynamically the text is adding in the control. But when the text goes over the height of the list box the scroll bar appears but it doesnt scroll down automatically. How do i make it autoscroll to follow new items?

Re: Problem in scrolling

Owner drawn30-Jan-06 22:28

Owner drawn

30-Jan-06 22:28

Rage has answered your question.

Jesus Lives Forever - Amen Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="10" step=".5" scrollamount="1" style="background:#99ccff;border-bottom:thin solid 1px #6699cc">
--Owner drawn Rose | [Rose]

--An eye for an eye makes the whole world blind.
--Jesus is Lord Rose | [Rose]

scrolling problem in listbox

Anu_Bala30-Jan-06 22:02

Anu_Bala

30-Jan-06 22:02

In my dialog,i have list box and im entering datas to list box thru button.When im entering datas the scroll bar is always placed in top position...To see the last enter text,i have to scroll the bar to bottom...
This is my problem..
IS there any command in MFC to keep the scroll bar always down to see the updated text...(For exemple,i need a listbox control like a notepad).Pls hlp me.....
Thanks in advance

-- modified at 4:06 Tuesday 31st January, 2006

Re: scrolling problem in listbox

Rage30-Jan-06 22:14

Rage

30-Jan-06 22:14

Capture the selection changed message, and in this message select the last item with

m_lb.SetCurSel(m_lb.GetCount());

~RaGE();

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