Download MetaTrader 5

How to send string from DLL to my EA?

To add comments, please log in or register
Share your program via Code Base. Gain access to millions of traders!
Guillermo 2016.03.10 11:46 

Hello, I would like to print some information received form an external library.

The best thing I have gotten working so far is passing an array of chars as a parameter and modifying each position individually.

Is there a simpler solution? Like returning a string from the DLL or modifying a string passed as a parameter? (I have tried both with no luck so far).

Thank you. 

Vasyl Nosal
Vasyl Nosal 2016.03.10 13:11  

no, only char

#import "con.dll"
   int ConnectToServer(char &a0[]);

extern string ip_address = "123.46.4";
char a[];
Ex Ovo Omnia
Ex Ovo Omnia 2016.03.10 13:43  

Returning a string is not the best idea -  it is complicated to control memory leaks. A safe solution is passing the string as a parameter, but you have to initialize it to its max length before sending the reference to DLL.

Mind the unicode when treating strings in DLL. 

Guillermo 2016.03.10 14:09  
EDIT: Got it working, guys. I was passing an incorrect parameter to CharArrayToString... I also made the code in the DLL to iterate through all chars of a char[], don't know if it is incorrect otherwise. I will test a few more things and share my final result!
To add comments, please log in or register