hmmio (HMMIO) - input

The open file handle returned by mmioOpen.

lOffset (LONG) - input

Specifies an offset, in bytes, to move the file position to.

lOrigin (LONG) - input

Specifies how the lOffset parameter is interpreted:

SEEK_SET

Seek to an absolute (bytes from the beginning of the file) seek position specified in the lOffset parameter. This is the default.
SEEK_CUR
Seek to a relative (bytes from the current file position) seek position specified in the lOffset parameter.
SEEK_END
Seek to lOffset bytes from the end of the file.
MMIO_SEEK_IFRAME
Seek to the nearest I-frame based on one of the previous flags. This flag can only be used with digital video only data tracks (or files).

rc (LONG) - returns

Returns the new file position (in bytes) from the beginning of the file. If an error occurs, MMIO_ERROR is returned. A call to mmioGetLastError might return the following error:

MMIOERR_SEEK_FAILED

Probable hardware error.

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