CloseDriver

CloseDriver Close a device driver

#include <Devices.h> Device Manager

short refNum ; device driver reference; as obtained via

returns Error Code; 0=no error

CloseDriver closes the device driver indicated by the reference number

after first completing any pending I/O. Lastly, the memory used by the driver

is released.

refNum is the reference number of an open device driver. See OpenDriver

Returns: an operating system Error Code. It will be one of:

noErr (0) No error

badUnitErr (-21) refNum doesn't match unit table

unitEmptyErr (-22) refNum specifies NIL handle in unit table

dRemoveErr (-25) Tried to remove open driver

Notes: We are warned not to try closing a driver before checking the

consequences of closing it. Individual driver close routines are listed in the

Manager specific to that topic, for example, see the Print Manager for

information on PrDrvrClose.

Referenced by (9):