17-Mar-01 23:46

how can I obtain handle to a window if I have handle to his process ?
pls help

Ivaylo guberov

Re: help

Tim Deveaux18-Mar-01 3:38

Tim Deveaux

18-Mar-01 3:38

Its tricky to get the main window of a process. One thing you can try is to call ::GetTopWindow(NULL) and ::GetNextWindow(...) until you have all the top level windows, then find the processes associated with them with GetWindowThreadProcessId(...).

You may find there is more than one top level window for the process. I've seen programs where arrays of comboboxes show as top level wnds! So, you need to do a few more heuistics to pare it down - maybe discarding certain window class texts, or windows with "" for their WindowText, or ferreting some resonable set of children for each, but I don't think there's a GetMainWindowForProcess function.

Any one can help me?

17-Mar-01 18:22

Any one know how can I write the code that can moving an image(bmp) across the screen?
Now I am currently working on my project. I must write the simulation program on VC++ about Train Station System but I don't know how to write the code that can display the train(bmp) moving on the rail (background). So, please suggest me which function I must use or other..

Thank you Blush | :O

Re: Any one can help me?

l a u r e n17-Mar-01 22:56

l a u r e n

17-Mar-01 22:56

you should be looking at the directx stuff

ie, directdraw, etc
Suspicious | :suss:

---
"every year we invent better idiot proof systems and every year they invent better idiots"

Re: Any one can help me?

Colin J Davies17-Mar-01 23:27

Colin J Davies

17-Mar-01 23:27

"every year we invent better idiot proof systems and every year they invent better idiots"

Does this mean we are improving at inventing idiots ?
or does it really mean that the idiots are inventing the "better idiot proof systems",

I Respect your opinion !

Regardz
Colin Davies

Mode robotoid idiot O' boredom

Re: Any one can help me?

18-Mar-01 19:01

The bmp you want to move around is actually called a "sprite" in the world of 2D Animations. A sprite is basically a Bitmap with a Mask that would make the unwanted areas of the bitmap in question to not be drawn or in other wotds turn transparent and then are both blitted to the screen over another Bitmap of the background.

You can produce a mask for your Train bmp and then blit it onto the background image usinf BilBlit(..) function.

Load your image using the LoadImage(..) function, or better yet put your image as a resource in your app and then load it.

Search the google.com on "Windows Sprite Programming" and you get a lot of good replies!

Good Luck! Smile | :)

Executing .bat files programmatically, C++

17-Mar-01 17:36

Any one has any suggestions on how i may execute a few batch files programmatically?? I would like to use C++.

Thanks in adv.

Sean Blush | :O

Re: Executing .bat files programmatically, C++

Michael Dunn17-Mar-01 17:48

Michael Dunn

17-Mar-01 17:48

Use ShellExecute() to run the batch file.

--Mike--
http://home.inreach.com/mdunn/
The preferred snack of 4 out of 5 Lounge readers.

Re: Executing .bat files programmatically, C++

Colin J Davies17-Mar-01 23:17

Colin J Davies

17-Mar-01 23:17

for real fun parse the BAT files,
and then use system() thus you'll
be able to trap for any errors in your windows APP,

Regardz
Colin Davies

How can I programmatically change the screen area?

17-Mar-01 14:01

Different computers have different screen areas. How can I programmatically attain a list of screen areas for a computer and how can I programmatically change the screen area?

Please, any response any one can give me will be greatly appreciated.

Sincerely,
Danielle (an overworked graduate student) Confused | :confused:

Re: How can I programmatically change the screen area?

Tim Deveaux17-Mar-01 15:17

Tim Deveaux

17-Mar-01 15:17

Checkout EnumDisplaySettings and ChangeDisplaySettings in the MSDN.

Re: How can I programmatically change the screen area?

David Cunningham17-Mar-01 15:27

David Cunningham

17-Mar-01 15:27

Tim, go out and have some green beer will you Smile | :)

. Have one for me too as I'm marooned at home with a sick Dead | X|

wife, two sick kids Dead | X|

and a sick me Dead | X|

.

(how's that for totally overusing a smiley!)

David

redirect cout to CEdit ?

17-Mar-01 11:24

Hi folks,
simple question :

I have 2 threads running where the second threads (not written by me) writes a lot of output to COUT, thou this thread has no console the data is lost. I can redirect this output by hard to a file.

I like to get the data written to COUT for debuggin in a CEdit field or some kind that ?

I never though about such a problem ?
Any Ideas ? Any Clues ?

Thx
oliver

Big Grin | :-D

How do you. . .

17-Mar-01 6:00

I have a cformview w/ a control that I'd like to have respond to the enter key. I understand you can use getdlgcode for dialogs, but would I need it for this situation? How would I go about doing this? I searched around but didn't come up with much in my situation. Any leads would be appreciated.

Thanks in advance.

Re: How do you. . .

Tim Deveaux17-Mar-01 14:56

Tim Deveaux

17-Mar-01 14:56

I don't know if this is good practise or not, but I found the keys being eaten on the way through some PreTranslateMsg code, so did this:

BOOL CSmc3View::PreTranslateMessage(MSG* pMsg) 
{
    // TODO: Add your specialized code here and/or call the base class
    if(pMsg->message != WM_KEYDOWN)
        return CFormView::PreTranslateMessage(pMsg);
    else 
        return WindowProc(pMsg->message, pMsg->lParam, pMsg->wParam);
    
}

Now, OnKeyDown gets hit in the form view class, and enter doesn't seem to be a problem. But I don't know if this is kosher - it bypasses a lot of MFC code... caveat emptor.

later...
er... and oh yeah... then you can call the OnButton code from OnKeyDown... geez, what a hack! Smile | :)

oh well... I try...

Sockets

ernst.maurer17-Mar-01 3:40

ernst.maurer

17-Mar-01 3:40

Hi
Can you recommend some sockets library
preferably based on C++ templates like STL or ATL

Thanx

Re: Sockets

Scott!17-Mar-01 4:21

Scott!

17-Mar-01 4:21

I purchased Dundas's TCP/IP Ent a couple of months ago. And have had very quick success. Download the demo, you'll find their libraries are easy to use.

Give them a look. Tech support has been awesome(I'm a rookie at this stuff). Very quick response.

Scott!

Put the big rocks in the glass jar first!

Re: Sockets

ernst.maurer17-Mar-01 4:38

ernst.maurer

17-Mar-01 4:38

Hi Scott

Thank you for advice.
But I need library with open source code (like ATL/WTL) and cross platform (like STL)

Ernst

Re: Sockets

David Cunningham17-Mar-01 7:05

David Cunningham

17-Mar-01 7:05

Hi there,

Just thought I should jump in and provide some clairification. Our Dundas TCP/IP package is available in a variety of formats, but is most commonly purchased as C++ source code.

Although we don't directly support the package on non-Windows platforms, we estimate that about 10% of our users end up porting the library to Solaris or Linux (we hear it takes about a day or so of work to replace the Windows threading calls to those of the target platform and the Winsock calls to Berkely Sockets).

I would encourage you to check it out, it will likely fit your needs quite nicely.

http://www.dundas.com/index.asp?products/tcpip

HTH,

David

Re: Sockets

Peter Godec19-Mar-01 8:32

Peter Godec

19-Mar-01 8:32

Try SocketMan. It is'a free and portable C++ library, so it pretty much fits your demands Smile | :)

How I can do it !!!

Ahmad16-Mar-01 21:44

Ahmad

16-Mar-01 21:44

HI ALL
I want to draw circle on the screen(or desktop), I mean out of client window
so I do like below :
HDC hdc = CreateDC (TEXT ("DISPLAY"), NULL, NULL, NULL) ;
it works but..................
then I do like below :
InvalidateRect (NULL, &rc, TRUE) ;
it erase the circle but....
When I use timer to draw circle and erase it quickly
SetTimer (hwnd, ID_TIMER, 200, NULL) ;
now the problem is apear
when I erase the screen very quickly and
repeatedly it makes the screen very shake ...
How I can avoid this shake...
THANK YOU

AHMAD AL-WASHALI
YEMEN
washali@yahoo.com

AHMAD ALWASHALI

Re: How I can do it !!!

l a u r e n16-Mar-01 23:32

l a u r e n

16-Mar-01 23:32

the 'shaking' is the natural flickering caused by erasing the bg and redrawing ... in games and other graphics programming a technique called 'double-buffering' is used

essentially you grab 2 lumps of memory big enough for a copy of the screen each and draw to these ... when you are ready to show a newly updated image you blit that to the screen and avoid the erase step

now if you are doing this for the whole desktop i think you may have a problem as the rest of the image will be changing beyond your control so it will be almost impossible to know what has moved where

hmmmmm.....

maybe you could use a borderless window that is transparent and set to the lowest z order and draw to that ... it would give the same effect but you wouldn't have to worry about other images in your client area and then could use the double buffering technique above

Cool | :cool:

---
"every year we invent better idiot proof systems and every year they invent better idiots"

Re: How I can do it !!!

Ahmad17-Mar-01 21:25

Ahmad

17-Mar-01 21:25

Thank you lauren . Smile | :)

but can I erase the area which I draw in ,I mean not whole screen just the area which I draw in ...

AHMAD ALWASHALI

Re: How I can do it !!!

l a u r e n17-Mar-01 22:52

l a u r e n

17-Mar-01 22:52

you don't draw directly to the desktop window at all
you set up a window that has no border or title bar etc and that is transparent and draw to that ... it will look like it is being drawn to the desktop but in fact wont be hence you can do what you like to the window you own

even if you have to copy the desktop to the window bg each time it will be far less data to copy than the whole desktop

Suspicious | :suss:

---
"every year we invent better idiot proof systems and every year they invent better idiots"

Re: How I can do it !!!

Ahmad19-Mar-01 21:49

Ahmad

19-Mar-01 21:49

THANK YOU VERY MUCH

AHMAD ALWASHALI

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

C / C++ / MFC

Mode robotoid idiot O' boredom