How to pass variables from and to (Exported Library)?

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selnomeria  

Hi.

I am building my everyday functions library, so I will include it in all my projects ( I dont know which one I should choose:  include or library filetype)...

However, many functions need to use some specific GLOBAL variables from the main indicator....


For example, in my main indicator i have:

double my_Day, my_Session, my_Endtime ......and many different variables..

void OnInit(){

double my_Day= SymbolInfoDouble(......);

double my_Session= SymbolInfoDouble(......);

......and many different declarations..

}

#import "stdlib.ex5" 

string MyFunc(bool StartTredline); 

#import



and in MyFunc function (inside Library file) I use those variables (my_Session, my_Endtime, and many others).


Is there any way to pass GLOBAL variables directly, without passing them as parameters everytime, like :


MyFunc(StartTrendline, my_Day, my_Session....... and many more)


instead, I called MyFunc(StartTrendline)

and it could read the GLOBAL variables from main indicator?



(In contrary, how can I access global variable, set in library file..)

William Roeder  
selnomeria: Is there any way to pass GLOBAL variables directly, without passing them as parameters everytime,
Pass them once, have the library remember the values.
selnomeria  
Stanislav Korotky:
If your library is for internal use only, you can implement it completely in a header file. Then there will be no need to have a library as an external compiled file. Then you can just include the header, and all common variables will be available in the global context.

Thanks guys.


To clarify again,  I decided to make 1 single file (where I combine my functions), and include that in every indi, instead of putting those functions one-by-one in all my indis..

how to do that? I mean coding part.  

The splendour and poverty How to secure MQL4 PositionsTotal() function doesn't get
honest_knave  
selnomeria:

Thanks guys.


To clarify again,  I decided to make 1 single file (where I combine my functions), and include that in every indi, instead of putting those functions one-by-one in all my indis..

how to do that? I mean coding part.  


Create an include file i.e. MyVariables.mqh

int var1 = 3;
double var2 = 10.2;
double func() { return(var1*var2); }

Then in your code (scripts, indicators, EAs):

#include <MyVariables.mqh>

void OnStart()
  {
   Print(var1);
   Print(var2);
   Print(func());
  }
selnomeria  
honest_knave:


Create an include file i.e. MyVariables.mqh

Then in your code (scripts, indicators, EAs):


THANKSSSSSSSSSSSSSSSSSS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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