C / C++ / MFC Discussion Boards

Re: Killing processes using TerminateProcess()

Jonathan.Oakley15-Apr-03 9:48

Jonathan.Oakley

15-Apr-03 9:48

Many thanks Erik! That is all I need for my purposes.

Cheers,

Jonathan.

Files

d.f15-Apr-03 7:53

d.f

15-Apr-03 7:53

I´d like to save an array in a file. How could I save it in VC++?? And how could I retrieve it?? Confused | :confused:

Thanks,

d.f

Re: Files

Joaquín M López Muñoz15-Apr-03 8:09

Joaquín M López Muñoz

15-Apr-03 8:09

It is up to you which format you choose to store the data of the array. A simple possibility would be:

lengthCRLF
data<sub>1</sub>CRLF
..
data<sub>n</sub>CRLF

(CRLF means new line) that is, one piece of data per line, beginning with the length of the array. Reconstructing the array from this info should be straightforward.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Menu in Dialog

bobthemonkey15-Apr-03 7:48

bobthemonkey

15-Apr-03 7:48

Is there a way to create a menu for a dialog box? Thanks.

bob

Re: Menu in Dialog

Joaquín M López Muñoz15-Apr-03 8:05

Joaquín M López Muñoz

15-Apr-03 8:05

Sure, create your menu with the resource editor, then go to the dialog resource, open its properties popup and select the menu in the Menu combobox.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Menu in Dialog

bobthemonkey15-Apr-03 8:16

bobthemonkey

15-Apr-03 8:16

D'oh! thanks.

MsgWaitForMultipleObjects

Dave_15-Apr-03 7:07

Dave_

15-Apr-03 7:07

Does anyone know if there are issues using this function within a dll call? I am trying to use it to wait for a global mutex handle, and it seems to never recognize that the mutex is available. If I use WaitForSingleObject(), it works fine. There are reasons for wanting to use the MsgWaitForMultipleObjects() so I cannot just shrug it off, and go with WaitForSingleObject().

Any ideas?

HANDLE ghAcess;

From within some function:

<br />
if (ghAccess == NULL)<br />
  ghAccess = OpenMutex(MUTEX_ALL_ACCESS,FALSE,"AccessMutex");<br />
<br />
//...This is actually within a while loop waiting about 30 seconds<br />
//this always seems to timeout:<br />
DWORD dwWaitResult = MsgWaitForMultipleObjects(1,&ghAccess,TRUE,100,QS_ALLINPUT);<br />
      switch (dwWaitResult) {<br />
        case WAIT_OBJECT_0:<br />
        case WAIT_ABANDONED_0:<br />
          return(ghAccess);<br />
        default:<br />
          break;<br />
      }<br />

Re: MsgWaitForMultipleObjects

Joaquín M López Muñoz15-Apr-03 7:46

Joaquín M López Muñoz

15-Apr-03 7:46

Are you sure you are using MsgWaitForMultipleObjects the right way? With bWaitAll set to TRUE, the function only returns WAIT_OBJECT_0 is there is some input in the queue. Is this what you want?

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: MsgWaitForMultipleObjects

Dave_15-Apr-03 8:23

Dave_

15-Apr-03 8:23

What I am looking for is a way to wait for the mutex (ghAccess) to become available while allowing messages to be processed.

Setting capacity for STL vector?

Anonymous15-Apr-03 6:57

Anonymous

15-Apr-03 6:57

Hi,

I keep getting a syntax error "C2059: syntax error : 'constant'"

When I try and specify a capacity for a vector based type.

<br />
...<br />
typedef std::vector<myClass> MyClassVector;<br />
...<br />
MyClassVector mcv (100); // this line gets C2059 ???<br />
<br />

I just stare and stare yet I cannot see the syntax error? Confused | :confused:

Thanks!

Re: Setting capacity for STL vector?

Joaquín M López Muñoz15-Apr-03 7:42

Joaquín M López Muñoz

15-Apr-03 7:42

Which compiler are you using? The following compiles fine in VC++ 6.0sp5:

#include <vector>
 
class myClass{};
 
typedef std::vector<myClass> MyClassVector;
 
MyClassVector mcv (100);
 
int main()
{
  return 0;
}

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Setting capacity for STL vector?

Anonymous15-Apr-03 6:55

Anonymous

15-Apr-03 6:55

Hi,

I keep getting a syntax error "C2059: syntax error : 'constant'"

When I try and specify a capacity for a vector based type.

<br />
...<br />
typedef std::vector<myClass> MyClassVector;<br />
...<br />
MyClassVector mcv (100); // this line gets C2059 ???<br />
<br />

I just stare and stare yet I cannot see the syntax error? Confused | :confused:

Thanks!

Re: Setting capacity for STL vector?

Rickard Andersson²⁰15-Apr-03 7:03

Rickard Andersson²⁰

15-Apr-03 7:03

This is from MSDN Library:

If the error message occurs on a symbol immediately following a typedef'd variable, ensure that the variable has been defined somewhere in the source code.

Rickard Andersson⁸
Here is my card, contact me later!
UIN: 50302279
E-Mail: nikado@pc.nu
Interests: C++, ADO, SQL, Winsock, 0s and 1s

Re: Setting capacity for STL vector?

Anonymous15-Apr-03 7:12

Anonymous

15-Apr-03 7:12

That does seem to apply to my situation as if I don't specify
a capacity i get no syntax error.

<br />
...<br />
typedef std::vector<myClass> myClassVector;<br />
...<br />
myClassVector mcv; // this line does NOT cause compiler error<br />

Re: Setting capacity for STL vector?

Gary Kirkham15-Apr-03 7:35

Gary Kirkham

15-Apr-03 7:35

have you tried

mcv.reserve(100);

Gary Kirkham

A working Program is one that has only unobserved bugs

I thought I wanted a career, turns out I just wanted paychecks

STL in DLL's

Jawache15-Apr-03 6:43

Jawache

15-Apr-03 6:43

I have a DLL class that I am exporting,

// Observer Class
class APA_API CStateObserver
{
...
}

class APA_API CStateMachine
{
public:
void PushObserver(CStateObserver * inpObserver);
private:
std::deque<cstateobserver*> m_dqObservers;
}

APA_API is the define that resolves to the correct __dellspec(lalalalalal) etc...

I get this compiler warning message,
warning C4251: 'm_dqObservers' : class 'std::deque<class cstateobserver="" *,class="" std::allocator<class="" *=""> >' needs to have dll-interface to be used by clients of class 'CStateMac

I have 'Warnings as Errors' set so this warning is a real problem.

What are my options?

Cheers

Asim Hussain
e: asim@jawache.net
w: www.jawache.net

Re: STL in DLL's

valikac15-Apr-03 6:47

valikac

15-Apr-03 6:47

Did you include the header for the deque container?

Kuphryn

Re: STL in DLL's

Jim Crafton15-Apr-03 7:46

Jim Crafton

15-Apr-03 7:46

disable it - I think this is one of the ones you can safely ignore (like warning 4786 about long names)

Also make sure you don't expose it directly, such as

class Foo {
public:
  map<int,int> & getTheIntMap() {
    return m_map;
  }

private:
  map<int,int> m_map;
}

exposing it like so will cause you all sorts of problems - just don't go there.
Wrap all access to the collection with functions for adding and removing, which it appears you are doing anyways.

Also you might consider using STLPort - which may give you fewer headaches

¡El diablo está en mis pantalones! ¡Mire, mire!

Real Mentats use only 100% pure, unfooled around with Sapho Juice(tm)!

CD-ROM Status

pmask15-Apr-03 6:36

pmask

15-Apr-03 6:36

Would you tell me what API support to recognize CD-ROM status when i push the button eject on CD-ROM. Example it can recognize there are CD in CD-ROM or not.

DLL builds fine in VS 6 but gets a link error in VS.NET

Cathy15-Apr-03 6:28

Cathy

15-Apr-03 6:28

Specifically I get "LINK : fatal error LNK1561: entry point must be defined"

I searched MSDN and with Google but no luck. Did this happen to anyone else? How did you get it to build?

Cathy

Life's uncertain, have dessert first!

Re: DLL builds fine in VS 6 but gets a link error in VS.NET

Rick York15-Apr-03 6:45

Rick York

15-Apr-03 6:45

Generally speaking, a DLL wants a function called DllMain as its default entry point. Do some MSDN searches on DllMain and you should see lots of stuff. There is a sample called DllHusk that is somewhat illustrative.

The Ten Commandments For C Programmers

Re: DLL builds fine in VS 6 but gets a link error in VS.NET

Cathy21-Apr-03 7:59

Cathy

21-Apr-03 7:59

Thanks! It turns out it was a typo in the include directory listing. I had accidentally deleted the period in front of \

Cathy

Life's uncertain, have dessert first!

Re: DLL builds fine in VS 6 but gets a link error in VS.NET

Jim Crafton15-Apr-03 7:51

Jim Crafton

15-Apr-03 7:51

check for _USRDLL being defined. See if subsystem is windows. Do you have any weird linker customizations? Just a thought (I actually don't have VC7 so I may be completely off base Smile | :)

)

¡El diablo está en mis pantalones! ¡Mire, mire!

Real Mentats use only 100% pure, unfooled around with Sapho Juice(tm)!

Re: DLL builds fine in VS 6 but gets a link error in VS.NET

Cathy21-Apr-03 8:01

Cathy

21-Apr-03 8:01

Thanks! It turns out it was a typo in the include directory listing. I had accidentally deleted the period in front of \

So yes I guess I had a pretty weird linker customization goin on. Laugh | :laugh:

Cathy

Life's uncertain, have dessert first!

Call a Dialod's method from other class

Martin_Viet15-Apr-03 6:08

Martin_Viet

15-Apr-03 6:08

Hi. I want to call one method, which i have declared in a Dialog´s Class from other class. So, in the second class i have a varible CDialog* pWnd; which is initialized by SetParent(CDialog *p). Then, in the dialog I call secondclass.SetParent(this). then i add the #include "mydlg.h" in seconclass.cpp

All that work fine. However, when i try to use any dialogclass's method in secondclass as ((CmyDlg*)pWnd)->NuevaTarea(strRecvd); doesn´t work

But when i compile this message appear : error C2065: 'IDD_SPOOLERSUR_DIALOG' : undeclared identifier
error C2057: expected constant expression

(SpoolerSur is my Cdialog class)

el hombre arriesga su vida cada vez que elige y eso es lo que lo hace libre

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