Re: GDI resource leak with MFC apps on XP SP2 - C / C++ / MFC Discussion Boards

JensB16-Sep-04 23:58

16-Sep-04 23:58

Hi,

Is there any way to get documentation about a visual c++ .dsp file?
I would like to be able to add parameters in the .DSP file. (environment variables for example)

Anyone could give me a good tutorial/link/documentation about this issue?

Thank you,
Jens

Re: .DSP information

Neville Franks17-Sep-04 0:02

Neville Franks

17-Sep-04 0:02

I've written code to read .DSP and .DSW files for ED (see sig). However I'm only interested in extracting folder and filenames and I don't write back to the files. If that's of any interest email me and I'll send you the code.

Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com

Re: .DSP information

JensB17-Sep-04 0:09

JensB

17-Sep-04 0:09

Hi Franks,

First of all, I am very interested in reading your code that can examine a .dsp file (.dsw is alsoo interesting).
I want to have a better look at what a .dsp contains and really needs.

Can I have your e-mail address please?

Best Regards,
Jens

Re: .DSP information

Neville Franks17-Sep-04 0:27

Neville Franks

17-Sep-04 0:27

I've just emailed them to you.

Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com

Re: .DSP information

Chris Richardson18-Sep-04 21:46

Chris Richardson

18-Sep-04 21:46

I've also written code to extract info from .DSP and .DSW files (with Neville's help no less!). My code extracts the files and some of the compiler settings from the .DSP, and extracts the projects from the .DSW.

The code is on CP, in the following article:

http://www.codeproject.com/useritems/includefinder.asp[^]

If you download the source, the files you are interested in are VC6Objects.cpp/h and DSObjects.cpp/h.

Chris Richardson

Re: .DSP information

JensB19-Sep-04 21:58

JensB

19-Sep-04 21:58

Hi,

I wanted to add 'code' into the .DSP file.
I have set an environment variable with text in it ("mylib.lib test2.lib" etc) in it, and i want it to be added in the include list of libs in the project.

Any ideas?

Best regards,
Jens

GDI resource leak with MFC apps on XP SP2

Rob Caldecott16-Sep-04 23:39

Rob Caldecott

16-Sep-04 23:39

Aaarrrggghhh. Recently, some users have been reporting problems with one of my massive MFC apps. Turns out it is leaking 6 HRGN handles everytime a new top-level window is opened (the program uses LOTS of CFrameWnd-derived top-level windows). Over the course of a day, some users are getting thousands of GDI handles leaked. Not good.

After much head scratching and some assistance from Google Groups, I tracked this down to a bug in Windows XP.

http://support.microsoft.com/?kbid=319740

Guess what? MS fixed this bug in XP SP1, but they have REINTRODUCED IT IN SP2!!!! Most of the XP users in our company have already upgraded to Service Pack 2 now too. Sob.

Sigh. So my users have to revert back to "Classic" mode to workaround this problem (no bad thing you might say!) which they are none too pleased about.

And, of course, as this is an MFC-specific issue, they think it is *my* fault as "other apps run fine".

I am praying for MS to release a hotfix but have no idea how I can escalate such a problem.

So fellow CPians - be warned - this bug may be affecting your MFC apps right now...

"May the seed of your loin be fruitful in the belly of your woman"

Re: GDI resource leak with MFC apps on XP SP2

Neville Franks17-Sep-04 0:12

Neville Franks

17-Sep-04 0:12

What a PITA. I wonder if it is possible to use the XP SP1 Uxtheme.dll mentioned in the KB.

Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com

Re: GDI resource leak with MFC apps on XP SP2

Rob Caldecott17-Sep-04 0:13

Rob Caldecott

17-Sep-04 0:13

I'm too chicken to try it! Sigh. The grief I am getting because of this bug...

"May the seed of your loin be fruitful in the belly of your woman"

Re: GDI resource leak with MFC apps on XP SP2

Gary R. Wheeler19-Sep-04 15:38

Gary R. Wheeler

19-Sep-04 15:38

Clickety[^]

Software Zen: delete this;

Random numbers

Cedric Moonen16-Sep-04 22:46

Cedric Moonen

16-Sep-04 22:46

Hello !
I would like to produce random numbers between 0 and 15. I tried to use srand and rand. So I used a similar code:

#define RAND_MAX  15     //Outside of the function<br />
srand(1);<br />
int Random = rand();<br />

But the numbers are greater than 15 Confused | :confused:

How can I do that ?
Thanks

Re: Random numbers

Mike Beckerleg16-Sep-04 22:59

Mike Beckerleg

16-Sep-04 22:59

Just #defining your own RAND_MAX is no good. The rand() method uses the RAND_MAX that was defined when the library it was in was compiled. To get it into a particular range try something like:

int Random = rand()*(15/RAND_MAX);

The other thing to note is that if you always seed the random number generator with the same number (1 in your example), it will always generate the same sequence of pseudorandom numbers. Try something like:

srand( (unsigned)time( NULL ) );<br />

This seends the generator with a value based on the current time so it should give you different sequences.

Mike

Re: Random numbers

Cedric Moonen16-Sep-04 23:02

Cedric Moonen

16-Sep-04 23:02

Thanks

Re: Random numbers

Martijn van Kleef16-Sep-04 23:58

Martijn van Kleef

16-Sep-04 23:58

To produce random numbers from 0 to some predefined limit it would probably be easiest to do:
#define RAND_MAX_LIMIT 15 // Set 15 as limit for randomly generated values
srand((unsigned)time(NULL)); // Seed random number generator with current time
int Random = rand() % (RAND_MAX_LIMIT + 1); // Only generate numbers between 0 and your predefined limit

Re: Random numbers

David Crow17-Sep-04 9:35

David Crow

17-Sep-04 9:35

cedric moonen wrote:
I would like to produce random numbers between 0 and 15.

Try rand() % 16.

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

Hyperlink(Button)List ??

Hardy_Smith16-Sep-04 22:20

Hardy_Smith

16-Sep-04 22:20

Hi Folks,

I am searching a listbox similar to the "favorits" list in IE6. A List with buttons or hyperlinks whitch I can dynamically add and remove. I need it for a MFC-App.

Sorry, don`t have time to write it myselfe...

Anybody knows something??

Thanks, Hardy.

a tyro's question

pcbirdwang16-Sep-04 22:08

pcbirdwang

16-Sep-04 22:08

How can I transmit a xml's datas to multi-listview？TKS！give me some sourcecodes pls.tks!

Using SetTimer

GDavy16-Sep-04 21:06

GDavy

16-Sep-04 21:06

Hello,
Quick question...
I have CDialog derived dialog and in it I start a timer in the OnInitDialog with a specific ID. I never kill that timer though when leaving the dialog.
Does anybody know if this might build up resources calling the SetTimer multiple times(with same ID!!!) without specifically killing it ever.
Does the Timer get killed when the dialog object goes out of scope?

Thx for any light on this subject..

Greetz,
Davy

Re: Using SetTimer

Mike Beckerleg17-Sep-04 1:28

Mike Beckerleg

17-Sep-04 1:28

I believe calling SetTimer multiple times will create multiple system timers, even if you call it with the same ID. The id is the value the timer returns to you when it ticks. This is different to the timer identifier which is the value returned by SetTimer.

The timer will not get killed when the dialog goes out of scope, you need to call KillTimer with the value returned by SetTime.

Mike

Re: Using SetTimer

David Crow17-Sep-04 9:37

David Crow

17-Sep-04 9:37

Timers are a limited system-wide resource, meaning that they can run out.

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

SuspendThread & TerminateThread

Martijn van Kleef16-Sep-04 21:02

Martijn van Kleef

16-Sep-04 21:02

I find the VS help to be a little vague on this method, does SuspendThread halt execution of a thread -immediately-? And what if the thread contains some no-user-mode code? Can I use it to decently halt a thread before calling TerminateThread to brutally kill it?

PS: I'm using TerminateThread because in one of my threads I'm calling into a function of a third-party lib (out of my control) that sometimes hangs. TerminateThread seems the only option left to stop the hanging (now threaded) function and retain control over application execution.

Re: SuspendThread & TerminateThread

Neville Franks17-Sep-04 0:36

Neville Franks

17-Sep-04 0:36

I don't know the answer to SuspendThread but I technique I find interesting and usefull to kill a thread is to force it to thow an exception. Have a look at http://www.codeproject.com/threads/threadlibrary.asp[^] which uses this technique.

Hope that helps.

Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com

CListCtrl-Multi-selection using SHIFT & arrow Key

krishnakumar7516-Sep-04 20:49

krishnakumar75

16-Sep-04 20:49

Hi,
I am working with CListCtrl in VC++ where I tried to implemnt the multi-selection of Items by
1) SHIFT+ Mouse click
2) SHIFT+ Arrow Key selection

I could implement these with NM_CLICK and ITEMCHANGED respectivly,
but gives inconsistant selected items.

Plse anybdy to solve this situation by tech advice/code snippet

Thanks,

Krishna

Krishnakumar

Re: CListCtrl-Multi-selection using SHIFT & arrow Key

Chris Richardson18-Sep-04 21:55

Chris Richardson

18-Sep-04 21:55

If the default multi selection works for you, then just turn off the single selection style:

m_YourListControl.ModifyStyle( LVS_SINGLESEL, 0 );

If that's not what you're after, sorry.

Chris Richardson

Re: CListCtrl-Multi-selection using SHIFT & arrow Key

krishnakumar7520-Sep-04 18:05

krishnakumar75

20-Sep-04 18:05

Hi, Thanks for reply.But I need the ListCtrl as multi-selection and I made it multiselection type.
It visually selects the multiple items too. But the problem is that when I tried to delete these items the count is inconsistant.

Krishna

Krishnakumar

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