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InstallDriverForDevice

InstallDriverForDevice installs the "best" driver for a device. The algorithm for determining the best driver is described in Matching Drivers With Devices.

OSErr InstallDriverForDevice(
                     RegEntryIDPtr device,
                     UnitNumber beginningUnit,
                     UnitNumber endingUnit,
                     DriverRefNum *refNum);
device
Pointer to Name Registry specification.
beginningUnit
Low unit number in unit table range.
endingUnit
High unit number in unit table range.
refNum
Resulting unit table refNum value.
DESCRIPTION

InstallDriverForDevice finds, loads, and installs the best driver for a device identified by its RegEntryID value. It installs the driver anywhere within the specified unit number range of the unit table and invokes its Initialize command, passing the RegEntryIDPtr value to it. The driver's initialization code must return noErr for InstallDriverForDevice to complete successfully. This function returns the driver's refNum value but it does not open the driver.

If the unit table is filled throughout the range from beginningUnit to the value returned by HighestUnitNumber, and the table has not already grown to its maximum size, it can expand to accept the new driver. To use this feature, set endingUnit larger than HighestUnitNumber().

RESULT CODES
noErr 0 No error
badUnitErr -21 Bad unit number
unitTblFullErr -29 Unit table or requested range full
fnfErr -43 File not found
All CFM errors (see Inside Macintosh: PowerPC System Software)
© 1999 Apple Computer, Inc. – (Last Updated 26 March 99)