LAnnContainer::LoadOffset
#include "ltwrappr.h"
virtual L_INT LAnnContainer::LoadOffset(fd, nOffset, nLength, pLoadFileOption)
L_INT fd; |
/* the Windows file handle */ |
L_INT32 nOffset; |
/* position of the first byte to load */ |
L_UINT32 nLength; |
/* number of bytes of annotation data to read */ |
pLOADFILEOPTION pLoadFileOption; |
/* pointer to a LOADFILEOPTION structure */ |
Loads annotations from a position within a file. This enables you to load an annotation file that is embedded in another file. This function is available in the Document/Medical Toolkits.
Parameter |
Description |
fd |
The Windows file handle of the file to load. |
nOffset |
The position, from the beginning of the file, of the first byte to load. (The byte count starts at zero.) |
nLength |
The number of bytes of annotation data to read from the file. If you saved the offset using LAnnContainer::SaveOffset, the variable pointed to by puSizeWritten in that function contains the length of data saved. If you do not know the length of the data, pass 0xFFFFFFFF for this parameter. |
pLoadOptions |
Pointer to the LOADFILEOPTIONstructure to be updated with the current extended values. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Required DLLs and Libraries
LTANN For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
See Also
Example
L_VOID TestLoadSaveOffset(LAnnContainer& LeadAContainer)
{
HFILE OffsetFile; // File handle
L_UINT32 ulSizeWritten; // Variable to be updated with
the size written
// Create a file
#ifdef UNICODE
OffsetFile
= _wcreat(TEXT("TOFFSET.ANN"), 0);
#else
OffsetFile = _lcreat("TOFFSET.ANN",
0);
#endif
// Write header information -- 29 characters and a terminator
_lwrite(OffsetFile, "This is a 29-character string",
30);
// Save the file with an offset
ulSizeWritten = LeadAContainer.SaveOffset(OffsetFile,
30, ANNFMT_NATIVE, FALSE);
// Close the file
_lclose(OffsetFile);
/* Loading */
// Open the file and get the file handle
#ifdef UNICODE
OffsetFile = _wopen(TEXT("TOFFSET.ANN"),
OF_READ|OF_SHARE_DENY_WRITE );
#else
OffsetFile = _lopen("TOFFSET.ANN",
OF_READ|OF_SHARE_DENY_WRITE );
#endif
// Load the file with a 30-byte offset
LeadAContainer.LoadOffset(OffsetFile,
30, ulSizeWritten, NULL);
// Close the file
_lclose(OffsetFile);
}