C / C++ / MFC Discussion Boards

Re: Can Tcp/Ip "Accept() " Be Made "Non Blocking"

palbano5-Aug-04 19:08

palbano

5-Aug-04 19:08

For anyone learning Windows Sockets development:

http://www.sockets.com/[^]

"No matter where you go, there your are." - Buckaroo Banzai

-pete

Re: Can Tcp/Ip "Accept() " Be Made "Non Blocking"

geo_m5-Aug-04 22:24

geo_m

5-Aug-04 22:24

or if you don't worry about win9x stuff, you can look here around for some articles about IOCP.

Correct ReBar/ToolBar/DialogBar functionality?

JBlair5-Aug-04 10:41

JBlair

5-Aug-04 10:41

I've been programming in MFC for some time now, but have not needed to do much with the "control bar" classes until recently.

My problem is, I would like to have a control bar (toolbar, rebar, dialogbar, i-don't-care-which-bar) with a combobox whose contents is added at runtime (from a database, for example).

I've coded up a toolbar that draws a combobox overtop a seperator, but that's very klunky. I tried using a dialog bar, but since its not CDialog derived, one cannot easially add a control instance to one's app and initialize the combobox in the traditional manner. And of course, a rebar seems only to take a toolbar, dialogbar, or (I think) individual controls, but I want multiple controls on a bar/band.

It seems the the controlbar functionality is made more for sending simple messages to one's app, rather than manipulating more complex data. Is there are a simple solution to this problem that I'm overlooking? Thanks for your help.

-Jesse

How to send kb/mouse message to an un-active "Notepad"?

Member 6253945-Aug-04 10:25

Member 625394

5-Aug-04 10:25

I have a windows application that made by someelse. I don't have the source to change it. It takes kb/mouse inputs and does some work. Therefore, I wish I could use a program to pretend the kb/mouse sending inputs to it, so that it could running automatically.

If the target application is running foreground, everything could be easy. Using any keyboard/mouse record & play software will satisfy me. But I wish it could be running background. So I can use forground (another active windows) to do something else, for example monitor.

So, the problem is how to pretend kb/mouse and send message to a BACKGROUND app. For example, how to send "hello" to a un-active Notepad and let Notepad accpet "hello" as keyboard inputs.

I tried PostMessage to it directly. But it seems it will not response to my message. (I used another little program to prove that all these KeyUP and KeyDown messages are sent correctly). So I think there is some windows mechanism which makes un-active windows response to kb message.

I have no clue at all, any advise is very welcome.

Thanks,

Joe

Connecting to multiple servers thru single port client connection

Sivaji5-Aug-04 9:26

Sivaji

5-Aug-04 9:26

Hey i am using CSocket class in MFC.

My program(client) should connect to multiple servers.
I am using single port at client to connect.It's connecting to the first server
successfully.For second server while connecting it's failing.
The error code it's returning is 0x00002748.
What's the meaning of this error code.

Is it possible to connect from the same port to multiple servers.If possible
pls help me.Is there any problem with CSocket class??

Thanks

Re: Connecting to multiple servers thru single port client connection

palbano5-Aug-04 19:13

palbano

5-Aug-04 19:13

Sivaji wrote:
What's the meaning of this error code.

"A connect request was made on an already connected socket."

For anyone learning Windows Sockets development.

http://www.sockets.com/[^]

"No matter where you go, there your are." - Buckaroo Banzai

-pete

automate the "create a new connection" wizard

guangguang5-Aug-04 7:37

guangguang

5-Aug-04 7:37

In my project, I need to automate the process of creating a new "incoming" network connection which acts as a server for client connections. We can manually go through this process: "Control Panel" -> "Network Connection" -> "create a new connection" -> Click "next" on the "new connection wizard" dialog -> Choose "set up an advanced connection" -> "connect to another computer" -> choose "Host" ... We can assume that user always select the fixed choice at each step.

Is there scripting tools or Windows API which can automate the above process? Anyboby can give me some hints? Thanks a lot,

-Jeff

Re: automate the "create a new connection" wizard

PJ Arends5-Aug-04 7:55

PJ Arends

5-Aug-04 7:55

I am sure that all the wizard does is set up registry entries. The trick is to figure out which entries, and set them yourself.

I am sorry, but I do not know what the entries are.

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

pls help... its very urgent...

deep_gz5-Aug-04 6:49

deep_gz

5-Aug-04 6:49

Hi,

i need to find out the amount of processor time used by a process.

My Requirement:
i am running 2 programs.
1) The ACTUAL process.
2) a monitor process.

The ACTUAL process goes into an infinite while
loop. it begins to use a 99% of the CPU time.

i need to detect this condition from the monitor
program and kill the ACTUAL program.

please help, its very urgent.

thank you..

Re: pls help... its very urgent...

Navin5-Aug-04 7:19

Navin

5-Aug-04 7:19

Just to add my 2 cents, this sounds like a very BAD solution. You need to figure out what is causing the infinite loop in the first place, and fix it! Doing it your way could cause other problems - resource leaks, for instance, or leave files/data in an unknown state.

An expert is somebody who learns more and more about less and less, until he knows absolutely everything about nothing.

Re: pls help... its very urgent...

deep gz5-Aug-04 8:05

deep gz

5-Aug-04 8:05

dear navin,

i gave an example....

suppose... a program enters into an infinite
loop... (suppose)...
then, it would surely use the maximum CPU time.

there's is a method by which we can detect the
cpu usage time of a process. i've seen the
method somewhere, but i dont remember it now..

can you help me.... ??

bye

Re: pls help... its very urgent...

David Crow5-Aug-04 9:46

David Crow

5-Aug-04 9:46

Using the majority of the CPU (e.g., 95%) and an infinite loop are not necessarily the same thing. While an infinite loop does cause the CPU usage to go very high, other operations can also cause the CPU usage to spike. So, if you were simply terminating a process based solely on CPU usage, you may be doing so for the wrong reason. Make sense?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: pls help... its very urgent...

David Crow5-Aug-04 7:31

David Crow

5-Aug-04 7:31

I agree with Navin. Address the infinite loop issue and the need for a separate "monitor" process should go away. Even if you do need an infinite loop (e.g., while (1)), you should still take measures so that it does not consume all of the CPU.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: pls help... its very urgent...

wb5-Aug-04 10:04

5-Aug-04 10:04

I agree with other two statements.
you want to do an ugly thing Smile | :)

but look for a class from Paul Maker on CP

CPdhQuery

I think this can solve your problem.

Event Handler Never Called??

hyling5-Aug-04 5:47

hyling

5-Aug-04 5:47

Hi,

I have dialog based application. If my event handler is in any class other than the main dialog class it never gets called. I would like to move the event handler to my subclass of a control.

Suggestions? What am I doing wrong?

Thanks
Hua-Ying

Re: Event Handler Never Called??

Jaime Stuardo5-Aug-04 6:09

Jaime Stuardo

5-Aug-04 6:09

some example code so that we can see what happen? I'm not a wizard Smile | :)

Jaime

Re: Event Handler Never Called??

hyling5-Aug-04 6:45

hyling

5-Aug-04 6:45

Example code probably won't help but I can walk through the steps to reproduce the problem.

I'm using Visual Studio 2003 .Net

- Create new MFC Application, select application type Dialog based.
- In the class view, using the wizard create a new class with a base class of CButton, I called mine MyButton.
- in the main dialog create a new button, right click and "Add Event Handler" choose the Message type: BN_CLICKED and the class as MyButton.
- in the handler OnBnClickedButton1 add MessageBox("hello");
- run application
- click button, nothing happens

however if you added the Event Handler to the main dialog class created by the wizard, then everything works fine. Confused | :confused:

Ideas?

Thanks
Hua-Ying

Re: Event Handler Never Called??

Maximilien5-Aug-04 7:01

Maximilien

5-Aug-04 7:01

did you put a break point in your handler ?

me think it's the MessageBox that simply doesn't show.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: Event Handler Never Called??

bikram singh5-Aug-04 7:08

bikram singh

5-Aug-04 7:08

Hmm. I'd say the button press must be notified to the parent of the button, in this case the dialog.

Notice that the event is called "BN_CLICKED". the "N" in "BN_" usually means "notification", in which case, the button's parent is notified.

HTH

Bikram Singh
I believe we should all pay our tax with a smile. I tried - but they wanted cash.

Re: Event Handler Never Called??

PJ Arends5-Aug-04 7:23

PJ Arends

5-Aug-04 7:23

Use message reflection. See technical note 62 in MSDN. Search for TN062

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

Re: Event Handler Never Called??

David Crow5-Aug-04 7:23

David Crow

5-Aug-04 7:23

In the message map for MyButton, add the following:

ON_CONTROL_REFLECT(BN_CLICKED, OnBnClickedButton1)

and remove the ON_BN_CLICKED() statement.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: Event Handler Never Called??

hyling5-Aug-04 7:49

hyling

5-Aug-04 7:49

Thanks, this is exactly what I'm looking for!

Re: Event Handler Never Called??

David Crow5-Aug-04 6:42

David Crow

5-Aug-04 6:42

What class did you derive from? What event are you wanting to handle?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: Event Handler Never Called??

hyling5-Aug-04 6:48

hyling

5-Aug-04 6:48

See my response to Jamie please, that should be enough to completely reproduce the problem.

Thanks
Hua-Ying

Re: Event Handler Never Called??

Navin5-Aug-04 7:25

Navin

5-Aug-04 7:25

IIRC, I think you will need to use "reflection" to make this work. There is usualy a weird message handle for classes like button that allows them to trap their own click messages.

In VS 7, and I think VS 6 did it this way too, the message you want to trap in the wizards looks something like:

=BN_CLICKED

And the message map entry will be something like:

ON_CONTROL_REFLECT(BN_CLICKED, OnBnClicked)

Hope this helps.

An expert is somebody who learns more and more about less and less, until he knows absolutely everything about nothing.

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