Re: About Threads - C / C++ / MFC Discussion Boards

Re: sndPlay freakin' Sound

Matt Philmon23-Oct-02 4:26

Matt Philmon

23-Oct-02 4:26

Send me the file and the snippet of code that plays it.

system command using MFC

achandra00723-Oct-02 4:18

achandra007

23-Oct-02 4:18

Is there a system type command in MFC? Or do I have to use system to launch another application from within my application?

Thanks
ashish

Re: system command using MFC

Simon.W23-Oct-02 4:34

Simon.W

23-Oct-02 4:34

Try ShellExecute

I am seeking...
For what?
Why did you ask me for what? I don't know!

Re: system command using MFC

pjnaughter23-Oct-02 4:34

pjnaughter

23-Oct-02 4:34

CreateProcess, WinExec, ShellExecute or ShellExecuteEx spring to mind. All documented in the MSDN

Re: system command using MFC

Ravi Bhavnani23-Oct-02 7:18

Ravi Bhavnani

23-Oct-02 7:18

Nice to see you on the VC++ forum, PJN!

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: system command using MFC

l a u r e n23-Oct-02 7:44

l a u r e n

23-Oct-02 7:44

seconded

"even if my world is weird it's my world"
biz stuff about me

About Threads

Mel Feik23-Oct-02 3:55

Mel Feik

23-Oct-02 3:55

Admittedly I know less about threads then I thought I did about an hour ago. I had thought that threads allow for a process to be completed at the same time code execution is continuing past the creation of the thread. Is this a correct way to look at them (threads) and if so, is there a way to hold the program until the completion of the last created thread?

---------------------------------------------

Be good! But if you can't be good, at least be good at it and try not to get any on ya!

-mjf

Re: About Threads

Ryan_Roberts23-Oct-02 4:05

Ryan_Roberts

23-Oct-02 4:05

Collect the handles that each createthreadex_ call returns to you in an array. Then call WaitForMultipleObjects on the the array in you exit handler. You can then guarantee that all your child theads have completed before your process thread.

Ryan.

Computers allow you to make more mistakes than any other invention, with the possible exception of handguns and tequila.

Re: About Threads

Le centriste23-Oct-02 7:25

Le centriste

23-Oct-02 7:25

Don't forget to pass TRUE as the WaitAll (3^rd) parameter.

Michel

It is a lovely language, but it takes a very long time to say anything in it, because we do not say anything in it, unless it is worth taking a very long time to say, and to listen to.

- TreeBeard

spaw and exec?

includeh1023-Oct-02 3:53

includeh10

23-Oct-02 3:53

do these 2 functions (spaw* and _exec) work under windows (not dos)?

thx

includeh10

Re: spaw and exec?

C^hris L^osinger23-Oct-02 7:30

C^hris L^osinger

23-Oct-02 7:30

they'll work under both .

-c

"[it was..] one of those evenings when you feel that not only will there definitely be a revolution, but that the Association of Manufacturers will foot the bill."
-- Umberto Eco, Foucault's Pendulum

Smaller Animals Software

Read File

Anonymous23-Oct-02 3:12

Anonymous

23-Oct-02 3:12

I have a directory and i want read the file without i know the name of file.
How i can start?

Re: Read File

Joaquín M López Muñoz23-Oct-02 3:18

Joaquín M López Muñoz

23-Oct-02 3:18

Have a look at FindFirstFile and friends.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Read File

Anonymous23-Oct-02 3:23

Anonymous

23-Oct-02 3:23

This function searches a directory for a file whose name matches the specified file name. FindFirstFile examines subdirectory names as well as file names.

I don't know the name of the file.

Re: Read File

Joaquín M López Muñoz23-Oct-02 3:24

Joaquín M López Muñoz

23-Oct-02 3:24

Look deeper into the docs Smile | :)

The function supports wildcards, take advantage of them.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Read File

Simon.W23-Oct-02 4:39

Simon.W

23-Oct-02 4:39

Use CFileFind class may be esaier

I am seeking...
For what?
Why did you ask me for what? I don't know!

Re: Read File

Anonymous23-Oct-02 7:40

Anonymous

23-Oct-02 7:40

This solution are not good. Other solition?

How do i use cout in Visual Studio .NET?

Anonymous23-Oct-02 2:53

Anonymous

23-Oct-02 2:53

It says that cout is an undecalred identifier when i #include <iostream>

thanks

Re: How do i use cout in Visual Studio .NET?

Joaquín M López Muñoz23-Oct-02 3:05

Joaquín M López Muñoz

23-Oct-02 3:05

It is std::cout, although many samples omit the prefix for brevity.
You can stick to the simpler cout including

using namespace std;

right after the #includes, though this is not, for a variety of reasons, a good policy to follow in general.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Visual C++ CD needed

puzzolino23-Oct-02 2:51

puzzolino

23-Oct-02 2:51

Hi all!
I'm searching for a free (legal, of course) Visual C++ CD, I mean, the Introductory or Student version or something similar. Unsure | :~

Where can I find it ?
Can I download it from some webstite ?
I need the 6.0 release (or later).

Please help! OMG | :OMG:

Re: Visual C++ CD needed

23-Oct-02 10:50

Several Intro to Visual C++ type books offer the Introductory Version on CD with the book. I did this, thinking it was the Standard Version.
http://www.microsoft.com/MSPress/books/3224.asp

Re: Visual C++ CD needed

puzzolino23-Oct-02 21:29

puzzolino

23-Oct-02 21:29

Thank you!
I've found the same Introductory version on another book too:
Learn Visual C++ N:-Dow

Dynamic Link Library

homer66623-Oct-02 2:16

homer666

23-Oct-02 2:16

Hi I want to create a dynamic link library in Visual C++ for use in Visual Basic.
From VB i pass a String to the dll, so far so good, but now i want to return another String to the VB-program. My problem is now the memory access error, that occurs in the running VB programm.
What types in the c++dll can i return to VB, that expect a String??

thanx for your replies

Re: Dynamic Link Library

Joaquín M López Muñoz23-Oct-02 2:23

Joaquín M López Muñoz

23-Oct-02 2:23

A BSTR, I think. CComBSTR could be useful to do this.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Catching OutputDebugStrings

adrian cooper23-Oct-02 2:10

adrian cooper

23-Oct-02 2:10

I though about creating a Edit window in my app that when called
at runtime would catch all OutputDebugStrings that my program was
making.

After some nosing about on MSDN about catching OutPutDebugStrings i
wrote a thread function as below and called it from a menu option. The
idea was to eventually create a small window that would be updated with
any OutPutDebugStrings that were caught.

<br />
UINT catchDebugString(LPVOID param)<br />
{<br />
	TCHAR myChar[1024];<br />
	DWORD dwProcessId = GetCurrentProcessId();<br />
	HANDLE hHandle = OpenProcess( PROCESS_ALL_ACCESS, false, dwProcessId );<br />
<br />
	if ( DebugActiveProcess( dwProcessId ) == 0 )<br />
        return 0;<br />
<br />
	DEBUG_EVENT de;<br />
    <br />
	while ( WaitForDebugEvent( &de, INFINITE ) )<br />
	{   <br />
		if ( de.dwDebugEventCode == OUTPUT_DEBUG_STRING_EVENT )<br />
		{<br />
			OUTPUT_DEBUG_STRING_INFO deStr = de.u.DebugString; <br />
<br />
   			ReadProcessMemory(hHandle, deStr.lpDebugStringData, myChar, 1024, NULL);<br />
		}<br />
	                     <br />
		if ( EXIT_PROCESS_DEBUG_EVENT == de.dwDebugEventCode )<br />
			break;<br />
<br />
		ContinueDebugEvent( de.dwProcessId, de.dwThreadId, DBG_CONTINUE );<br />
	}     <br />
<br />
	return 1;<br />
}<br />

All was well until i found out i cant call DebugActiveProcess( dwProcessId )
with my own process id , there by making it so i cant catch my own OutputDebugStrings.

I just wondered if anyone out there had any ideas of how i could overcome this
problem or if there is another way to catch OutputDebugStrings??

cheers

AdrianCooper me;
while(CKitchen::beerInFridge()) {
me.watchTV();
me.consumeBeer(myKitchen.getBeerCan());
}

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