Re: random number generator - C / C++ / MFC Discussion Boards

Re: Dshow.h is missing!!!?

James R. Twine8-Feb-07 4:37

James R. Twine

8-Feb-07 4:37

Google for DirectShow...

Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
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Re: Dshow.h is missing!!!?

lolo088-Feb-07 6:36

lolo08

8-Feb-07 6:36

Hi,
My friend i tried this and much more but I reelly have a big problem to find
"dshow.h"

lassaad

Re: Dshow.h is missing!!!?

Mark Salsbery8-Feb-07 8:28

Mark Salsbery

8-Feb-07 8:28

The header comes with an SDK. Unless you install the SDK and follow its instructions on setting
the development environment to where the header/lib/exe files can be found then the compiler
isn't going to find it.

Mark

Re: Dshow.h is missing!!!?

Mark Salsbery8-Feb-07 5:21

Mark Salsbery

8-Feb-07 5:21

The DirectShow SDK is included with the Microsoft ® Windows Server® 2003 R2 Platform SDK[^]

Re: Dshow.h is missing!!!?

ravidborse29-Dec-09 23:02

ravidborse

29-Dec-09 23:02

Look For Microsoft SDK in your C:\Program Files\Microsoft SDKs\Windows\v6.0A\Include or otherwise download Microsoft SDK

Thanks & Reply

random number generator

Member 38093708-Feb-07 4:29

Member 3809370

8-Feb-07 4:29

I am trying to get a random number generator for a Windows Form program in Visual C++. Any ideas?

Bob

Re: random number generator

James R. Twine8-Feb-07 4:32

James R. Twine

8-Feb-07 4:32

The RTL provides srand(...) and rand(...) for PRNG...

Peace!

Re: random number generator

Alessandra778-Feb-07 6:57

Alessandra77

8-Feb-07 6:57

This is how you do it in C:

#include <time.h><br />
<br />
srand ((unsigned) time (NULL));<br />
...<br />
// for example<br />
	while (i < 20)<br />
	{<br />
		q = (positioner) malloc (sizeof (struct broj));<br />
		q->element = rand ();<br />
		q->next = p->next;<br />
		p->next = q;<br />
		i++;<br />
	}

Hope I helped Smile | :)

Alessandra

button pushing

paski22228-Feb-07 4:21

paski2222

8-Feb-07 4:21

i want to start my program then go out and when a predifined event happens outside of the program i want to program to press a button on another aplication how can i make my program press buttons within other applications?

Re: button pushing

Dustin Henry8-Feb-07 4:53

Dustin Henry

8-Feb-07 4:53

I have implemented this by using the CSocketComm Class[^]. I am basically setting up one application as a server and the other as a client, and sending messages that I can then parse and act on. The two applications talk to each other using the loopback address(127.0.0.1) and a port I specified.

This of course will only work if you have written both applications.

Regards,
Dustin

Transfering files via TCP/IP

Dustin Henry8-Feb-07 4:08

Dustin Henry

8-Feb-07 4:08

In several of my programs I have been using the CSocketComm class[^] in order to send commands between applications, but what I'm not real clear on is how to transfer files. I'm assuming that I will use a CFile or similar on the client side to read the bytes and transfer to the server, which will re-assemble them into another CFile, but I'm lacking in the specifics such as how many bytes to send at a time etc. Does anyone know of a good tutorial that I can read for some help, or is it as simple as I have stated above.

Thanks as always for your help,
Dustin

Re: Transfering files via TCP/IP

David Crow8-Feb-07 4:09

David Crow

8-Feb-07 4:09

Dustin Henry wrote:
I'm assuming that I will use a CFile or similar on the client side to read the bytes and transfer to the server...

I think you'd want to use CFtpConnection.

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

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

Re: Transfering files via TCP/IP

Dustin Henry8-Feb-07 4:48

Dustin Henry

8-Feb-07 4:48

I won't actually be connecting to an FTP server, just another computer running my server application implemented with the CSocketComm class. I'm doing this so that I can retrieve current data about the system the application will be hosted on. So in escence I need to send the file from application to application and then have the server side application save the file to disk.

Thanks,
Dustin

Re: Transfering files via TCP/IP

David Crow8-Feb-07 5:12

David Crow

8-Feb-07 5:12

Dustin Henry wrote:
I won't actually be connecting to an FTP server...

Understood. Sorry 'bout that. Blush | :O

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

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

Re: Transfering files via TCP/IP

Mark Salsbery8-Feb-07 5:32

Mark Salsbery

8-Feb-07 5:32

It sounds like you have it.

Send any size chunks you want. Keep in mind the default socket internal buffer size is 8K so
for best performance keep those flushed (recv data as fast as you can Smile | :)

).
A chunk/packet size right around 500 bytes will insure each chunk fits in one TCP packet but the
protocol handles larger chunks. Without increasing the socket buffer sizes, 500 - 8K byte packets
will work well.

Re: Transfering files via TCP/IP

Dustin Henry8-Feb-07 6:13

Dustin Henry

8-Feb-07 6:13

Great! Thanks as always for the advice Mark!

Re: Transfering files via TCP/IP

Moak26-Feb-07 1:35

Moak

26-Feb-07 1:35

If you want to achieve high transfer rates you should consider setting you buffer sizes to at least 32K (e.g. read 32K chunks from a file and use a socket send buffer of 32K). Otherwise bulk data transfer will be very likely slower than 100 kB/sec.

Tip: Set the server socket send buffer to the wanted size (SO_SNDBUF and possible also SO_REUSEADDR) after you created it, sockets created from the listening socket will then inherit this settings.

For further reading see Jon Snader's Effective TCP/IP Programming.

/M

Sir, How to Invalidate A Button ?

CodeVarma8-Feb-07 3:01

CodeVarma

8-Feb-07 3:01

Fly Like An Eagle With MIGHTY POWER.

Re: Sir, How to Invalidate A Button ?

prasad_som8-Feb-07 3:11

prasad_som

8-Feb-07 3:11

Use CWnd::InvalidateRect.

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

Re: Sir, How to Invalidate A Button ?

Ravi Bhavnani8-Feb-07 6:25

Ravi Bhavnani

8-Feb-07 6:25

Or just CWnd::Invalidate(). Smile | :)

/ravi

This is your brain on Celcius
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Re: Sir, How to Invalidate A Button ?

prasad_som8-Feb-07 7:33

prasad_som

8-Feb-07 7:33

Ravi Bhavnani wrote:
just CWnd::Invalidate().

Both function have similar effect, i.e. both function internally calls win32 funtion InvalidateRect, in case of
CWnd::Invalidate, it is

void CWnd::Invalidate(BOOL bErase)
	{ ::InvalidateRect(m_hWnd, NULL, bErase);//second parameter is NULL to consider whole client area
 }

In case of CWnd::InvalidateRect it is defined as

void CWnd::InvalidateRect(LPCRECT lpRect, BOOL bErase)
	{ ::InvalidateRect(m_hWnd, lpRect, bErase);//passing second parameter as NULL has same effect }

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

Re: Sir, How to Invalidate A Button ?

Ravi Bhavnani8-Feb-07 7:37

Ravi Bhavnani

8-Feb-07 7:37

prasad_som wrote:
Both function have similar effect

That was exactly my point. Smile | :)

/ravi

This is your brain on Celcius
Home | Music | Articles | Freeware | Trips
ravib(at)ravib(dot)com

CFileDialog

josip cagalj8-Feb-07 2:52

josip cagalj

8-Feb-07 2:52

Hi everyone i have a small problem.
In my app i need to save some txt, so i'm using this code:CFileDialog fileDlg (FALSE, "txt",strFilename ,OFN_OVERWRITEPROMPT| OFN_HIDEREADONLY, szFilters, this);
where for example m_strFilename="ADMA_log[01.01.2007]", and szFilters[]= "Text Files (*.txt)|*.txt|All Files (*.*)|*.*||";
Now i call DoModal() but i get nothing, my fileDlg m_hWnd = NULL.
I'f i change strFilename to "NULL" i get the windov but without initial filename that appears in the filename edit box!?
Help, please.
p.s.sorry for my poor english.

Re: CFileDialog

David Crow8-Feb-07 3:23

David Crow

8-Feb-07 3:23

What is the value of _WIN32_WINNT? If it's 0x0500 or greater, you'll need to use GetSaveFileName() instead.

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

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

Re: CFileDialog

josip cagalj8-Feb-07 23:02

josip cagalj

8-Feb-07 23:02

I tryed doing so

<br />
char szFilters[]= "Text Files (*.txt)|*.txt|All Files (*.*)|*.*||";<br />
<br />
CString m_SavePath = _T("");<br />
char IniDir[256];<br />
char szFile[256];<br />
char buff[256];<br />
strcpy(IniDir, fs2.GetFolder());//get's the folder path <br />
strcpy(buff,"");<br />
strcpy(szFile,buff);<br />
<br />
OPENFILENAME lpofn;<br />
lpofn.lStructSize	= sizeof(OPENFILENAME);<br />
lpofn.hwndOwner		= m_hWnd;<br />
lpofn.lpstrFile		= szFile;<br />
lpofn.nMaxFile		= sizeof(szFile);<br />
lpofn.lpstrFilter	= szFilters;<br />
lpofn.nFilterIndex	= 1;<br />
lpofn.lpstrDefExt	= "txt";<br />
lpofn.lpstrCustomFilter	= NULL;<br />
lpofn.lpstrFileTitle	= NULL<br />
lpofn.nMaxFile		= 0;<br />
lpofn.lpstrInitialDir	= IniDir;<br />
lpofn.Flags		= OFN_OVERWRITEPROMPT|OFN_HIDEREADONLY;<br />
lpofn.lpstrTitle	= "Save";<br />
	<br />
if(GetSaveFileName(&lpofn))<br />
{<br />
	pMainFrm->Refresh();<br />
	strcpy(IniDir, szFile);<br />
	IniDir[lpofn.nFileOffset]=0;<br />
	m_SavePath=szFile;<br />
<br />
	// The file from which to load the contents of the rich edit control.<br />
	CFile cFile(m_SavePath, CFile::modeCreate|CFile::modeWrite);<br />
	EDITSTREAM es;<br />
<br />
	es.dwCookie =  (DWORD) &cFile;<br />
	es.pfnCallback = (EDITSTREAMCALLBACK) MyStreamOutCallback;<br />
<br />
	m_Output.StreamOut(SF_TEXT,es); // Perform the streaming<br />
}<br />

and still not working!
Did I get all lpofn parametar's right, or what?
Big thanks!!!!

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