# Miscellaneous File Functions

PxIOAddIndex |

## Description

Add a key to a keyed file without having to rebuild the file

## Format

int PxIOAddIndex(PxIOFileHandle handle, struct KEYDEF *pKeyDef);

Where:

handle | The handle of an open keyed file
pKeyDef | The key definition of the key to add. For details on the format of a key definition, see Appendix H for the KEYDEF structure in PxIO.h.

## Return Value

If the function succeeds, a value of PXIO_SUCCESS_STATUS is returned; otherwise, an error value is returned. More information on the nature of the error can be found by calling PxIOGetError.