C / C++ / MFC

Sahir Shah22-Feb-07 20:39

Sahir Shah

22-Feb-07 20:39

Depends on how you are accessing the web page. One way of doing it is through MSHTML. Please see this page for an example

http://www.sahirshah.com/CSharp/objcall.html[^]

MuraliKrishnaP22-Feb-07 20:54

MuraliKrishnaP

22-Feb-07 20:54

That was a .Net code

David Crow23-Feb-07 3:08

David Crow

23-Feb-07 3:08

Aside from the obvious answer of, "With your eyes," can you be a bit more specific about what you want?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Ravi Bhavnani23-Feb-07 4:20

Ravi Bhavnani

23-Feb-07 4:20

See this[^] article for an easy way to scrape HTML.

/ravi

This is your brain on Celcius
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ui thread MFC

deeps_cute22-Feb-07 20:10

deeps_cute

22-Feb-07 20:10

hi i am having a function named FinalCall() which in turn call some functions. i have to do thread for this in mfc. i tried

void CBootLoader1Dlg::OnYes()
{
AfxBeginThread(ComputeThreadProc,phObjectHandle);

//FinalCall();

}
UINT CBootLoader1Dlg::ComputeThreadProc(LPVOID pParam)
{

HWND *phObjectHandle = static_cast<hwnd *="">(pParam);
::PostMessage(*phObjectHandle, WM_UPDATE_CONTROL, 0, 0);

return 0;

}

LRESULT CBootLoader1Dlg::PaintText(char* lParam)
{

FinalCall();
return 0;
}
there is no errors . but i cant acheive the threading.
can any one explain this
thanx in advance

Arise Awake Stop Not Till ur Goal is Reached.

Cedric Moonen22-Feb-07 20:14

22-Feb-07 20:14

You didn't post the code in which you started the new thread. Can you post it ?
And what is the problem exactly ?

Cédric Moonen
Software developer

Charting control [v1.1]

deeps_cute22-Feb-07 22:32

deeps_cute

22-Feb-07 22:32

yes i posted it as ON_MESSAGE(WM_UPDATE_CONTROL,PaintText).

Arise Awake Stop Not Till ur Goal is Reached.

Cedric Moonen22-Feb-07 22:49

22-Feb-07 22:49

Ok, you updated your post.

The problem is that when you post a message, you will post it in the message queue associated with the thread that created the window (see here[^] ). So, the message will still be processed by your GUI thread (from any thread you sent it).

Why don't you call the FinalCall function directly there instead of posting a message ?

Cédric Moonen
Software developer

Charting control [v1.1]

prasad_som22-Feb-07 20:24

writing DWORD to serial port

22-Feb-07 20:24

Again, you havn't stated your problem exactlty.

deeps_cute wrote:
but i cant acheive the threading.

What does this mean, thread procedure is not getting called ?

Prasad
Notifier using ATL | Operator new[],delete[][^]

l_d22-Feb-07 20:03

l_d

22-Feb-07 20:03

i want to write very large numbers for ex 61118792 to the serial port.so i want to use DWORD to write data instead of byte.
When i take byte as parameter when using writeFile & ReadFile(and pass small values) i am able to get correct output,but if take parameter as DWORD i am getting some garbage value.

Please do reply how to solve this, if any other way also please suggest.

prasad_som22-Feb-07 20:08

22-Feb-07 20:08

Can you show code ? causing this.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: writing DWORD to serial port [modified]

l_d22-Feb-07 21:45

l_d

22-Feb-07 21:45

This is the code i found from codeguru.
The URL is as below

www.codeguru.com/Cpp/I-N/network/serialcommunications/article.php/c5395

please do take some time to look at the code

prasad_som22-Feb-07 21:52

22-Feb-07 21:52

Doesn't Cedric's answer satisfy your query ?

l_d wrote:
www.codeguru.com/Cpp/I-N/network/serialcommunications/article.php/c5395

Are you talking about this function ?

BOOL CSerialPort::WriteByte(BYTE bybyte)
{
iBytesWritten=0;
if(WriteFile(hComm,&bybyte,1,&iBytesWritten,NULL)==0)
return false;
else return true;
}

If you want to use DWORD, you need to modify it to,

BOOL CSerialPort::WriteByte(DWORD dWord)
{
iBytesWritten=0;
if(WriteFile(hComm,&dWord,sizeof(DWORD),&iBytesWritten,NULL)==0)
return false;
else return true;
}

-- modified at 4:01 Friday 23rd February, 2007
Corrected typo.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Cedric Moonen22-Feb-07 22:12

22-Feb-07 22:12

Well, that's a solution but it is not very convenient to modify the function so that it can support everything you want to transmit Unsure | :~

.

I looked at the article but I don't really see the added value of it. Yes, of course, it is perfect when you want to send bytes but when you have more complex datatypes then it becomes a pain in the sense that you need to use masks and bit shifting Dead | X|

Cédric Moonen
Software developer

Charting control [v1.1]

l_d22-Feb-07 22:21

l_d

22-Feb-07 22:21

thanks for Prasad& you for looking at the article.I understood what u both meant and modified but even then when i am reading back the value in that edit box i am getting garbage value.

can anyone please suggest me any other method when i want to send very large values that too many values if possible in an array accepting from different edit boxes.

Cedric Moonen22-Feb-07 22:28

22-Feb-07 22:28

Well, if you modified the code accordingly to what prasad said, you need of course to do the same for the Read function (so that it can read DWORD and not bytes).

Cédric Moonen
Software developer

Charting control [v1.1]

prasad_som22-Feb-07 22:23

22-Feb-07 22:23

Actually, I dont wanted to read the article, as it was to much for me to read whole article, because OP dont want to paste relevent code.

So I looked in to WriteFile part of article and give him suggestion.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Cedric Moonen22-Feb-07 22:27

22-Feb-07 22:27

Yes sure the same for me. In fact the post was not intended as a 'rant' to you but more to the article itself. That's not very flexible to only be able to send bytes. It would have been much more convenient to be able to send a buffer (if the buffer size is 1, then you only send one byte).

Cédric Moonen
Software developer

Charting control [v1.1]

Cedric Moonen22-Feb-07 20:21

22-Feb-07 20:21

To write data to a serial port, you provide tha address of a buffer and the size of data to transmit. So if you want to send your DWORD, you simply need to do this:

DWORD dwMydata = 61118792;
WriteFile(...., &dwMyData, sizeof(DWORD), ....);  // Replace ... by what you need.

Cédric Moonen
Software developer

Charting control [v1.1]

merge sort

meet_kirankumar22-Feb-07 19:26

meet_kirankumar

22-Feb-07 19:26

how to write a merge sort program using COM?

Re: merge sort

prasad_som22-Feb-07 19:34