[← Utils](../README.md)

# Utils/SetFiles

Programmatic generation and editing of MetaTrader `.set` files (the parameter files used to run/optimize EAs).

## Main features
- Build a `.set` file from scratch, line by line, with typed parameters: number, real, bool, enum, datetime, color (`CSetFile.AddParamLine*`).
- Load an existing `.set` file and modify specific parameter values or optimization ranges (`InitByFile`, `ModifyParamValue*`, `ModifyParamOpt*`).
- Insert lines at a specific position, remove lines, and export back to string or file (`InsertParamLine*`, `RemoveLine`, `Save`, `GetAsString`).
- Print/debug helpers for inspecting the current parameter table (`Imprimir`, `Summary`).

## Basic usage
```mql5
void OnStart()
 {
  CSetFile sf;
  sf.Init("BotSimple");
  sf.AddParamLineNumber("InpMagic", 100, 100, 1, 999);
  sf.AddParamLineReal("InpRisk", 1.0, 2, 0.1, 0.1, 10.0);
  sf.AddParamLineBool("InpUseFilter", false);
  sf.AddParamLineDatetime("InpStartDate", D'2024.01.01', D'2020.01.01', 86400, D'2025.12.31');
  sf.AddParamLineColor("InpLineColor", clrRed);

  sf.ModifyParamValueNumber("InpMagic", 999);
  sf.ModifyParamValueRealNumber("InpRisk", 5.5, 2);
  sf.ModifyParamValueBoolean("InpUseFilter", true);
  sf.ModifyParamValueDatetime("InpStartDate", D'2025.06.01');
  sf.ModifyParamValueColor("InpLineColor", clrBlue);

  sf.ModifyParamOptDatetimeStart("InpStartDate", D'2023.01.01');
  sf.ModifyParamOptDatetimeStep("InpStartDate", 3600);
  sf.ModifyParamOptDatetimeStop("InpStartDate", D'2026.01.01');

  sf.Imprimir();
 }
```

> Only the most representative methods are shown here.