Three steps:
1- At the top of dll place these lines:
struct MqlStr
{
int len;
char *string;
};[/PHP]
2- In the dll function use something like:
MT4_EXPFUNC long __stdcall test(MqlStr* szTest)
{
}3- In mq4 use something like:
[PHP]string szTest[];
test(szTest);thanks for pointing this out.
Working in languages with garbage collector for too long made my brain a little soft...
Best wishes,
Armin
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Hi there,
i'm trying to pass strings from an external DLL to MT4, with no luck. Every time the EA calls the method, MT4 just crashes.
Could someone please point me to a piece of source that exchanges strings with external DLLs or enlighten me by other means?
Here's my non-working code:
c++:
MT4_EXPFUNC void _stdcall doEchos ( std::string& s )
{
s.append("MOOO moo!");
}
MT4 Header:
#import "C:\SDev\...\...\my.dll"
void doEchos ( string& s) ;
#import
MT4 EA:
string ress="";
doEchos(ress);
Any comment?
Thanks,
Armin