# OpenMathFolio

Opens the math folio and sets _MathBase global variable.

### Synopsis

`int32 OpenMathFolio( void )`

### Description

This function attempts to open the math folio structure. If it successfully locates the math folio, it sets the global variable _MathBase to point to the math folio structure. If it fails to open the folio, it returns a negative number that can be printed with the PrintfSysError function.

Programs must call OpenMathFolio before attempting to use any of the math folio functions.

### Return Value

If successful, the function sets the global variable _MathBase to point to the math folio structure. If unsuccessful, it returns a negative number.

### Implementation

Convenience call implemented in operamath.lib V20.

### Associated Files

operamath.h, operamath.lib