Control Problem - C / C++ / MFC Discussion Boards

Re: tracking the focus

bikram singh9-Jul-04 6:56

bikram singh

9-Jul-04 6:56

Run a Timer function and call GetFocus() from within the timer function.

Bikram Singh

Creating a Trial version of a program

Anonymous8-Jul-04 17:53

Anonymous

8-Jul-04 17:53

I would like some suggestions on how to create a version of my program for use as a trial. I want the program to either quit working after a specified date or to only run X number of times. What are methods to do this that can't be hacked around?

Re: Creating a Trial version of a program

User 5838528-Jul-04 18:02

User 583852

8-Jul-04 18:02

You cannot make it 100% unhackable

You could reduce the features and not ship the code that implements the disabled features. People cant run code they dont have.

Re: Creating a Trial version of a program

Antony M Kancidrowski9-Jul-04 1:07

Antony M Kancidrowski

9-Jul-04 1:07

Quite true

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

Re: Creating a Trial version of a program

Ken Mazaika8-Jul-04 18:06

Ken Mazaika

8-Jul-04 18:06

Almost all of the ways possible to make a program shareware are possible to go around. One way to do it is to encrypt a hidden key somewhere in the registry with the set date to expire that an uninstall utility wouldn't remove.

The most secure way I can think of would be to make the user create a user name and password to register it. When you registered it it would notify the host of the usernames and increment the number of times the username/password combination has been used. If the number approaches a specific value you could delete it. This would require the user to have internet access, which most do.

Those are my ideas....I dont know how they would work.

Re: Creating a Trial version of a program

*Dreamz8-Jul-04 18:12

*Dreamz

8-Jul-04 18:12

Check this...
http://www.codeproject.com/system/cexpire01.asp

Re: Creating a Trial version of a program

Anonymous9-Jul-04 8:39

Anonymous

9-Jul-04 8:39

Thanks, this is just what I was looking for.

Control Problem

Ken Mazaika8-Jul-04 17:47

Ken Mazaika

8-Jul-04 17:47

I'm using OpenGL on a dialog based MFC application. It works fine and well until I try to open a messagebox. Then the program freezes. I'm not sure why. By cutting certain lines of code out, I have discovered that the only lines that stop the problem from occuring that I can remove is:

<br />
CString className = AfxRegisterWndClass(<br />
		CS_HREDRAW | CS_VREDRAW | CS_OWNDC,<br />
		NULL,<br />
		(HBRUSH)GetStockObject(BLACK_BRUSH),<br />
		NULL);<br />
CreateEx(<br />
		0,<br />
		className,<br />
		"OpenGL",<br />
		WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,<br />
		rect,<br />
		parent,<br />
		0); <br />

I dont see how this could cause the error, but I think it does. If anyone can tell me how to make it not freeze when I display a message box I would appreciate it. Thanks a bunch.

Ken

IO Completion ports

haritadala8-Jul-04 17:22

haritadala

8-Jul-04 17:22

Hello all

Can any one please tell me when to use IO Completion ports with sockets? When we want to handle asynchronous read or write operations we can do with event objects then why to use IO Completions ports?

Please advice ..

Thanks for your help.

Amarelia Maehsh
Gujarat
India

Re: IO Completion ports

Garth J Lancaster8-Jul-04 18:07

Garth J Lancaster

8-Jul-04 18:07

You could follow the link below and start by reading Len Holgate's series - 3 articles in this series, plus some extra 'offshoots'

http://www.codeproject.com/internet/jbsocketserver1.asp[^]

'G'

Re: IO Completion ports

User 5838528-Jul-04 18:35

User 583852

8-Jul-04 18:35

we have a server app that used to create a thread for each connection. This was fine for 100 users but was too slow for 1000's of connections

I changed it to use asynchronous io and a completion port with a fixed number of threads, one listener, one receiver, one worker per cpu and a couple of others for timing, cache purging etc.

The listener accepts connections and assosiates them with the completion port, the receiver waits on the completion port and generates job objects based on the received message. These are then queued and processed by the worker threads.

This has worked very well in production (most customers have very high end multiprocessor boxes) with 1000's of connections

Get Process Path with only process id

Member 7916798-Jul-04 17:12

Member 791679

8-Jul-04 17:12

Dear all,

need some help.
I freeze the process loading using 'PsSetCreateProcessNotifyRoutine' on win2k and winXP.

I manage to get the process id and process name from it.
However, i need the full path for the process.
I have try the following and failed.
1)EnumProcessModules
2)CreateToolhelp32Snapshot
3)GetModuleFileNameEx
4)WTSQuerySessionInformation

All the above fail to get the process path using the process id.
I need it to work in win2k and winXP.

any ideal?

Thank you in advance.

Cheers,

Re: Get Process Path with only process id

Jeffrey Walton14-Jul-04 13:03

Jeffrey Walton

14-Jul-04 13:03

Hi nihao,

Have you tried using GetModuleFileName in conjunction with the previous?

Jeff

Re: Get Process Path with only process id

Member 79167914-Jul-04 23:09

Member 791679

14-Jul-04 23:09

Jeff,

thanks for the response.

and yes, i have try it.
it dun works.
Somehow the information is not updated when the process is freeze.

Thanks,
Murphy

file transfere via winsock

surfman198-Jul-04 15:04

surfman19

8-Jul-04 15:04

hi! how can i realize a file transfere via winsock with tcp/ip protocoll??
please help me!!

cu

Re: file transfere via winsock

John R. Shaw8-Jul-04 17:46

John R. Shaw

8-Jul-04 17:46

It has been a while. What do you mean? You open a file read it into a buffer or part of it and send it. If you are using winsock and understand it enough to make a connection, then sending anything should be easy (sort of like writing to a file).

A little more explination is required.

INTP

Re: file transfere via winsock

surfman199-Jul-04 10:18

surfman19

9-Jul-04 10:18

should i encrypt the data stream when i send the file or a chat message with winsock? how does icq manage this?

cu

Printing Bitmaps Texture Fills

Pinhead_Me8-Jul-04 14:07

Pinhead_Me

8-Jul-04 14:07

When printing shapes filled with bitmap textures, the data sent to the Printer is very large, ~58 MB for a single page. It seems that the bitmap texture is being send to the printer each time the texture is tiled.

I there any way to improve on the performance when printing shapes filled with bitmap textures?

this is what I am doing:

OnDraw(CDC* pDC)
{

CBitmap bmpTexture;
CBrush brushFill;

bmpTexture.LoadBitmap(IDB_BITMAP_TEXTURE_6);
brushFill.CreatePatternBrush(&bmpTexture);

CBrush* pOldBrush = pDC->SelectObject(&brushFill);

//Use the texture brush to fill shapes
pDC->Ellipse(...);
pDC->Rectangle(...);
//etc.. More fill shapes

...
}

Re: Printing Bitmaps Texture Fills

John R. Shaw8-Jul-04 17:53

John R. Shaw

8-Jul-04 17:53

I am not sure what the printing problem is. But it seems to me you should first create a memory DC and do all your drawing there, then print it.

INTP

drawing in win32

MG06668-Jul-04 13:32

MG0666

8-Jul-04 13:32

Hai,
I am doing drawtext() in vc++ win32. But I am seeing a white background behind the text.I want in the background of the window.Is there any way I can do it?
Thanks a lot.

Re: drawing in win32

PJ Arends8-Jul-04 13:57

PJ Arends

8-Jul-04 13:57

Use SetBkColor() to set the background colour.

"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: drawing in win32

MG06668-Jul-04 14:10

MG0666

8-Jul-04 14:10

hai ,
Thanks for replying. Actually I cannot do that because my window background has mulitple colors . Is there any way to set the background as transparent?
Thanks again.

Re: drawing in win32

Pinhead_Me8-Jul-04 14:08

Pinhead_Me

8-Jul-04 14:08

Use the following before DrawText();

pDC->SetBkMode(TRANSPARENT); // Default is set to OPAQUE

Hope that helps

Re: drawing in win32

MG06668-Jul-04 14:12

MG0666

8-Jul-04 14:12

Thanks a lot.
It worked.

Need to disable keybord and or the mouse

Larsson8-Jul-04 12:48

Larsson

8-Jul-04 12:48

Hello,
I Need some help if there is anyone that now this stuff please help me. I Need to disable the keybord and or the mouse to. Is there anyone that now how to do this?.

Please help me.

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