Expert, Script or Indicator?

[Forex Trader]

Hi there,

When writing a MT4 library is there a means programtically of determing whether the code is being called from an Expert, Script or Indicator?

For example...

void some_function() {

if (IsScript() == TRUE) {
// Do some script stuff...
}
else
if (IsExpert() == TRUE) {
// Do some expert stuff...
}
else {
// Must be an indicator then so do some expert stuff...
}

}

Obviously there aren't any MQL functions called IsScript() or IsExpert() but I would like to know if it is possible to write code that essentially does the same as the example above.

Regards,

Laurence.

[Forex Trader]

You can write library function with desired call parameter, for exmple:

double   getValue(int shift,..., string whoCall)
{
   ...
   if (whoCall=="expert")
      {
      ...
      }
   if (whoCall=="indicator")
      {
      ...
      }
}