LimeLM and Metatrader4Answered

Hello,

I'm trying to use LimeLM with Metatrader4 (MT4) but I'm struggling adapting the C++ header file to native MT4 library file. Can someone help please?

Here's what I've got so far:

<snipped entire TurboActivate.h header>

But I'm getting errors like:

'uint32_t' - unexpected token    TurboActivate.mqh    12    23
'uint8_t' - unexpected token    TurboActivate.mqh    13    23
'STRTYPE' - unexpected token    TurboActivate.mqh    14    23
'*' - pointer cannot be used    TurboActivate.mqh    15    20
'STRCTYPE' - unexpected token    TurboActivate.mqh    15    23
'int32_t' - declaration without type    TurboActivate.mqh    16    9
'int32_t' - unexpected token    TurboActivate.mqh    16    9
'TCHAR' - unexpected token    TurboActivate.mqh    17    23
'uint32_t' - unexpected token, probably type is missing?    TurboActivate.mqh    23    5
'nLength' - semicolon expected    TurboActivate.mqh    23    14
'STRCTYPE' - unexpected token, probably type is missing?    TurboActivate.mqh    27    5
'sExtraData' - semicolon expected    TurboActivate.mqh    27    14
class type expected, pointer to type 'ACTIVATE_OPTIONS' is not allowed    TurboActivate.mqh    30    26
'PACTIVATE_OPTIONS' - unexpected token    TurboActivate.mqh    30    27
'uint32_t' - unexpected token, probably type is missing?    TurboActivate.mqh    64    5
'nLength' - semicolon expected    TurboActivate.mqh    64    14
'uint32_t' - unexpected token, probably type is missing?    TurboActivate.mqh    67    5
'flags' - semicolon expected    TurboActivate.mqh    67    14
'uint32_t' - unexpected token, probably type is missing?    TurboActivate.mqh    70    5
'nDaysBetweenChecks' - semicolon expected    TurboActivate.mqh    70    14
'uint32_t' - unexpected token, probably type is missing?    TurboActivate.mqh    77    5
'nGraceDaysOnInetErr' - semicolon expected    TurboActivate.mqh    77    14
'GENUINE_OPTIONS' - identifier already used    TurboActivate.mqh    80    16
  see previous declaration of 'GENUINE_OPTIONS'    TurboActivate.mqh    60    8
'*' - '{' beginning bracket expected    TurboActivate.mqh    80    32
'PGENUINE_OPTIONS' - unexpected token    TurboActivate.mqh    80    33
'C' - declaration without type    TurboActivate.mqh    153    1
'C' - declaration without type    TurboActivate.mqh    172    1
'C' - declaration without type    TurboActivate.mqh    188    1
'C' - declaration without type    TurboActivate.mqh    201    1
'C' - declaration without type    TurboActivate.mqh    236    1
'C' - declaration without type    TurboActivate.mqh    255    1
'C' - declaration without type    TurboActivate.mqh    268    1
'C' - declaration without type    TurboActivate.mqh    290    1
'C' - declaration without type    TurboActivate.mqh    314    1
'C' - declaration without type    TurboActivate.mqh    338    1
'C' - declaration without type    TurboActivate.mqh    352    1
'C' - declaration without type    TurboActivate.mqh    368    1
'C' - declaration without type    TurboActivate.mqh    414    1
'C' - declaration without type    TurboActivate.mqh    440    1
'C' - declaration without type    TurboActivate.mqh    452    1
'C' - declaration without type    TurboActivate.mqh    472    1
'C' - declaration without type    TurboActivate.mqh    489    1
'C' - declaration without type    TurboActivate.mqh    517    1
'C' - declaration without type    TurboActivate.mqh    537    1
'C' - declaration without type    TurboActivate.mqh    564    1
'C' - declaration without type    TurboActivate.mqh    580    1
'uint32_t' - declaration without type    TurboActivate.mqh    586    36
'C' - declaration without type    TurboActivate.mqh    604    1
'C' - declaration without type    TurboActivate.mqh    626    1
'C' - declaration without type    TurboActivate.mqh    648    1
'C' - declaration without type    TurboActivate.mqh    672    1
'C' - declaration without type    TurboActivate.mqh    684    1
'C' - declaration without type    TurboActivate.mqh    706    1
'C' - declaration without type    TurboActivate.mqh    720    1
 

I've put the TurboActivate.dll file in the Libraries folder under MQL.

Any help appreciated. Thanks.

, edited
Answer
// Define types and constants
#define TA_SKIP_OFFLINE 1
#define TA_OFFLINE_SHOW_INET_ERR 2
#define TA_SYSTEM 1
#define TA_USER 2

// Define structures
struct ACTIVATE_OPTIONS
{
  int nLength;            // Equivalent to uint32_t
  string sExtraData;      // Extra data to pass to LimeLM servers (maximum 255 UTF-8 characters)
};

struct GENUINE_OPTIONS
{
  int nLength;            // Size of the structure
  int flags;              // Flags to control TA_IsGenuineEx behavior
  int nDaysBetweenChecks; // How often to check with the LimeLM servers (90 days recommended)
  int nGraceDaysOnInetErr;// Grace period days in case of an internet error (14 days recommended)
};

// Import functions from the LimeLM DLL
#import "LimeLM.dll"
int TA_IsGenuineEx(GENUINE_OPTIONS &genOpts);  // Check if the license is genuine
int TA_ActivateOptions(ACTIVATE_OPTIONS &actOpts); // Activate the license with additional options

// Add any other function you need to import from the LimeLM DLL here
#import
// Function to verify the license
int VerifyLicense()
{
  GENUINE_OPTIONS genOpts;
  genOpts.nLength = sizeof(GENUINE_OPTIONS);
  genOpts.flags = TA_SKIP_OFFLINE;
  genOpts.nDaysBetweenChecks = 90;
  genOpts.nGraceDaysOnInetErr = 14;

  int result = TA_IsGenuineEx(genOpts);
  if(result == 0) // TA_OK
  {
     Print("License is valid.");
  }
  else
  {
     Print("License verification failed: ", result);
  }
  return result;
}

// Function to activate the license with additional options
int ActivateLicense(string extraData)
{
  ACTIVATE_OPTIONS actOpts;
  actOpts.nLength = sizeof(ACTIVATE_OPTIONS);
  actOpts.sExtraData = extraData;

  int result = TA_ActivateOptions(actOpts);
  if(result == 0) // TA_OK
  {
     Print("Activation successful.");
  }
  else
  {
     Print("Activation failed: ", result);
  }
  return result;
}

// Usage example
void OnStart()
{
  // Verify the license at the start of the script or EA
  int license = VerifyLicense();

  // If activation is required, activate the license
  if(license != 0) // If not TA_OK
  {
     string extraData = "Example extra data";
     ActivateLicense(extraData);
  }
}
, edited

Thank you ever so much. I've tried it and it compiles. I'll test it if it runs soon. 

Once again, thank you.

That likely *almost* works. It's missing the handle parameters (the first parameters) and the TA_GetHandle() function. And other functions you need to make verification accurate. But you should be able to modify the code SymaFR_ provided to fix those things and get a working example.

Ok, thanks.

There was one function I can't convert and that's this:

typedef void(TA_CC * TrialCallbackType)(uint32_t, void *);

TURBOACTIVATE_API HRESULT TA_CC TA_SetTrialCallback(uint32_t handle, TrialCallbackType callback, void * userDefinedPtr);

How would you convert this please?

I'm unfamiliar with metatrader language, but it looks like they support function pointers (which is all that TrialCallbackTypeis. See: https://stackoverflow.com/a/56154900/124805

Thank you.

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