how EA can open a file in dll - page 2

[Alain Verleyen]

forex2start:

You may use _wfopen function to open file with "wchar_t *" type filename.

And this is my code:

 And it is a simple VC++ DLL project, no .def file required.

Can you show the mql5 test code also ?

[Jian Chen]

angevoyageur:
Can you show the mql5 test code also ?

Sure, the code is very simple.

#import "TestDLL.dll"
void TestFile(string filename);
#import 

//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+

void OnStart()
  {
//---
   TestFile("test.txt");
  }
//+------------------------------------------------------------------+

After running the above mql5 script program, a "test.txt" file will be generated at the installation folder of MT5.

If we specify an absolute path, for example, "d:\\test.txt", the file will be created right there. 

[ctycheer]

forex2start:

You may use _wfopen function to open file with "wchar_t *" type filename.

And this is my code:

 And it is a simple VC++ DLL project, no .def file required.

thank you very much!!!

It's work!!!

So the string in metatrader is UNICODE!!!!!!, if you use char in the dll ,the program couldn't work normally

It‘s very interesting!!!!

At the first time , I realize the value of Unicode.

I met the trouble for two months ,but now it's not a problem .thank you !