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GetTapePosition

The GetTapePosition function retrieves the current address of the tape, in logical or absolute blocks.

VB4-32,5,6
Declare Function GetTapePosition Lib "kernel32" Alias "GetTapePosition" (ByVal hDevice As Long, ByVal dwPositionType As Long, lpdwPartition As Long, lpdwOffsetLow As Long, lpdwOffsetHigh As Long) As Long

Operating Systems Supported
Requires Windows NT 3.1 or later; Win9x/ME: Not supported

Library
Kernel32

Parameter Information
hDevice
Identifies the device on which to get the tape position. This handle is created by using CreateFile.

dwPositionType
Specifies the type of address to obtain. This parameter can be one of the following values:
TAPE_ABSOLUTE_POSITION
The lpdwOffsetLow and lpdwOffsetHigh parameters receive the device-specific block address. The dwPartition parameter receives zero.
TAPE_LOGICAL_POSITION
The lpdwOffsetLow and lpdwOffsetHigh parameters receive the logical block address. The dwPartition parameter receives the logical tape partition.

lpdwPartition
Points to a variable that receives the number of the current tape partition. Partitions are numbered logically from 1 through n, where 1 is the first partition on the tape and n is the last. When a device-specific block address is retrieved, or if the device supports only one partition, this parameter receives zero.

lpdwOffsetLow
Points to a variable that receives the low-order 32 bits of the current tape position.

lpdwOffsetHigh
Points to a variable that receives the high-order 32 bits of the current tape position. This parameter can be NULL if the high-order 32 bits are not required.

Return Values
If the function succeeds, the return value is NO_ERROR.

If the function fails, the return value is one of the following error codes:
ERROR_BEGINNING_OF_MEDIA
An attempt to access data before the beginning-of-medium marker failed.

ERROR_BUS_RESET
A reset condition was detected on the bus.

ERROR_END_OF_MEDIA
The end-of-tape marker was reached during an operation.

ERROR_FILEMARK_DETECTED
A filemark was reached during an operation.

ERROR_SETMARK_DETECTED
A setmark was reached during an operation.

ERROR_NO_DATA_DETECTED
The end-of-data marker was reached during an operation.

ERROR_PARTITION_FAILURE
The tape could not be partitioned.

ERROR_INVALID_BLOCK_LENGTH
The block size is incorrect on a new tape in a multivolume partition.

ERROR_DEVICE_NOT_PARTITIONED
The partition information could not be found when a tape was being loaded.

ERROR_MEDIA_CHANGED
The tape that was in the drive has been replaced or removed.

ERROR_NO_MEDIA_IN_DRIVE
There is no media in the drive.

ERROR_NOT_SUPPORTED
The tape driver does not support a requested function.

ERROR_UNABLE_TO_LOCK_MEDIA
An attempt to lock the ejection mechanism failed.

ERROR_UNABLE_TO_UNLOAD_MEDIA
An attempt to unload the tape failed.

ERROR_WRITE_PROTECT
The media is write protected.

Examples

Related Functions

 

 


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