Timers in console ?

I have read something in the HELP of MSDN and it said that it will add something in the main of the program like that :

Code:

---

case WM_TIMER:
 
    switch (wParam)
{
        case IDT_TIMER1:
...............

---

But is that only when it's not a console ? Cause I do not know where to add that code in a console ?

Can we use TIMER in console application?
The answer is boolean, yes or no :D

Just make life easy and use timeSetEvent, which is far more accurate, and it doesn't mess up the message queue (just calls your function when it times out).

timeSetEvent...hummm I will read about it in MSDN help, thx :)

Code:

---

#include <iostream>
#include <mmsystem.h>

using namespace std;

void Print(void);

void main()
{
        timeSetEvent(
          1000,               
          0,         
          Print(), 
          0,             
          0);               

}//End main

void Print(void)
{
        cout << "ForEVER" << endl;
}//End print

---

[error]
mainSource.cpp
c:\program files\microsoft visual studio\vc98\include\mmsystem.h(113) : error C2146: syntax error : missing ';' before identifier 'MMVERSION'
c:\program files\microsoft visual studio\vc98\include\mmsystem.h(113) : fatal error C1004: unexpected end of file found
Error executing cl.exe.
[/error]

What do I do wrong?

Did you #include <windows.h> before mmsystem.h?

but i thought all windows functions were included in windows.h....

guess not :rolleyes:

OK now I have an other error :

Code:

---

#include <iostream>
#include <windows.h>
#include <mmsystem.h>

using namespace std;

void Print(void);

void main()
{
        timeSetEvent(
          1000,               
          0,         
          Print(), 
          0,             
          0);               




}//End main

void Print(void)
{
        cout << "ForEVER" << endl;
}//End print

---

error C2664: 'timeSetEvent' : cannot convert parameter 3 from 'void' to 'void (__stdcall *)(unsigned int,unsigned int,unsigned long,unsigned l
ong,unsigned long)'
Expressions of type void cannot be converted to other types
Error executing cl.exe.

Try declaring Print() something like this:

PHP Code:

---

void Print(unsigned int something,unsigned int bah,unsigned long what,unsigned long hmm,unsigned long geeky); 


---

Look at the reference for setTimeEvent to see what the parameters are.

I do not understand why I have to do that?

It said "cannot convert parameter 3 from 'void' to 'void (__stdcall *)(unsigned int,unsigned int,unsigned long,unsigned l
ong,unsigned long)" so it's probably not able to use the parameter void. Try it and see if it works.

The function needs to have the __stdcall attribute, as the error said ;)

I think the problem here is in the "()" after Print. C expects a pointer to a function, and the way you're doing this now is calling the function and passing the return value (a void) to timeSetEvent.
The following code might work:

Code:

---

        timeSetEvent(
          1000,               
          0,         
          Print, 
          0,             
          0);

---

Edit: Oh, and mmsystem.h is included in windows.h, so you only need to #include <windows.h> :)

PHP Code:

---


#include <iostream>
#include <windows.h>
//#include <mmsystem.h>

using namespace std;

void Print(void);

void main()
{
    timeSetEvent(
      1000,                
      0,           
      Print,  
      0,               
      0);                

}//End main

void Print(void)
{
    cout << "ForEVER" << endl;
}//End print 


---

Code:

---

error C2664: 'timeSetEvent' : cannot convert parameter 3 from 'void (void)' to 'void (__stdcall *)(unsigned int,unsigned int,unsigned long,uns
igned long,unsigned long)'
        None of the functions with this name in scope match the target type
Error executing cl.exe.

---

Ah, I got it to work now :)
For some reason timeSetEvent expects a callback function with a lot of parameters. I don't know what they are, but you could experiment with them if you want. Otherwise, just ignore them as I have done in the following code.
(The while() is just to make sure the program doesn't end before the timer is activated)

Code:

---

#include <iostream.h>
#include <windows.h>

//using namespace std;

int g_Stop = 0;

void CALLBACK Print(unsigned int,unsigned int,unsigned long,unsigned long,unsigned long)
{
    cout << "ForEVER" << endl;
    g_Stop = 1;
}//End print

int main()
{
    timeSetEvent(
      1000,               
      0,         
      Print, 
      0,             
      0);   
       
    while( g_Stop == 0 )
    {
        cout << ".";
    }

    return 0;
}//End main

---

THX! I will check that code later, and check about CALLBACK, I never used that word before :eek:

:)

Here is what I got :

Code:

---

Compiling...
mainSource.cpp
Linking...
mainSource.obj : error LNK2001: unresolved external symbol __imp__timeSetEvent@20
Debug/DosTimer.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

DosTimer.exe - 2 error(s), 0 warning(s)

---

Error are in the linkage:confused:

You probably forgot to include windows.h that's why you're getting the linking error.
I think CALLBACK is defined as _stdcall and setTimeEvent requires the function to be declared as such.

I have windows.h, I copy and paste Stef code's

Ah, sorry, forgot to tell you about that.:rolleyes:
- Go to Project > Settings
- Choose "All configurations" from the drop down menu (on the left)
- Go to the Link tab
- Add winmm.lib to the line labeled "Object/library modules"

If you have VC7 right-click your project in the solution explorer, choose properties, then select the project again if you have to, then go to linker-> input and add the library there

I have lost the link to that thread and I just tested it and it work!

Thx all :)