GetLastError
IsStopped
UninitializeReason
MQLInfoInteger
MQLInfoString
MQLSetInteger
TerminalInfoInteger
TerminalInfoDouble
TerminalInfoString
Symbol
Period
Digits
Point
IsConnected
IsDemo
IsDllsAllowed
IsExpertEnabled
IsLibrariesAllowed
IsOptimization
IsTesting
IsTradeAllowed
IsTradeContextBusy
IsVisualMode
TerminalCompany
TerminalName
TerminalPath

IsDllsAllowed

Checks if the DLL function call is allowed for the Expert Advisor.

bool IsDllsAllowed();

Returned value

Returns true if the DLL function call is allowed for the Expert Advisor, otherwise returns false.

Example:

  #import "user32.dll"
     int     MessageBoxA(int hWnd, string szText, string szCaption,int nType);
  ...
  ...
  if(IsDllsAllowed()==false)
    {
     Print("DLL call is not allowed. Experts cannot run.");
     return(0);
    }
  // expert body that calls external DLL functions
  MessageBoxA(0,"an message","Message",MB_OK);