Loads information about the annotation file embedded in another file, into the specified ANNFILEINFO structure.
#include "ltwrappr.h"
virtual L_INT LAnnContainer::FileInfoOffset(fd, pAnnFileInfo, uStructSize)
The Windows file handle of the file.
Pointer to the ANNFILEINFO structure to be updated with the annotation file information.
Size in bytes, of the structure pointed to by pAnnFileInfo, for versioning. Use sizeof(ANNFILEINFO).
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
This function can be used to get information about a LEAD annotation file that is embedded in another file.
To use this function, do the following:
Win32, x64.
L_INT LAnnContainer_FileInfoOffsetExample(LAnnContainer & AnnContainer, L_TCHAR * szFile, L_UINT uFormat)
{
L_INT nRet;
HANDLE hFile;
SAVEFILEOPTION SaveFileOption;
ANNFILEINFO AnnFileInfo;
L_TCHAR szMessage[256];
L_TCHAR * szFormat;
DWORD uOffset = 30;
DWORD wWrittenBytes;
hFile = CreateFile(szFile, GENERIC_ALL, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
WriteFile(hFile, "This is a 29-character string", uOffset,&wWrittenBytes,NULL);
// Save the annotations as the first page of the file
nRet =(L_INT) AnnContainer.SaveOffset((L_HFILE)&hFile, uOffset, uFormat, FALSE);
if(nRet != SUCCESS)
return nRet;
// Flip and then save as the second page
nRet = AnnContainer.Flip(NULL, ANNFLAG_RECURSE);
if(nRet != SUCCESS)
return nRet;
SaveFileOption.uStructSize = sizeof(SAVEFILEOPTION);
SaveFileOption.Flags = ESO_INSERTPAGE;
SaveFileOption.PageNumber = 2;
nRet = (L_INT)AnnContainer.SaveOffset((L_HFILE)&hFile , uOffset, uFormat, FALSE, &SaveFileOption);
if(nRet != SUCCESS)
return nRet;
// Rotate and then save as the third page
nRet = AnnContainer.Rotate(45.0, NULL, ANNFLAG_RECURSE);
if(nRet != SUCCESS)
return nRet;
SaveFileOption.PageNumber = 3;
nRet = (L_INT)AnnContainer.SaveOffset((L_HFILE)&hFile, uOffset, uFormat, FALSE, &SaveFileOption);
if(nRet != SUCCESS)
return nRet;
// Get information about the file
AnnFileInfo.uStructSize = sizeof(ANNFILEINFO);
AnnFileInfo.nOffset = uOffset;
nRet = AnnContainer.FileInfoOffset((L_HFILE)&hFile, &AnnFileInfo, sizeof(AnnFileInfo));
if(nRet != SUCCESS)
return nRet;
switch (AnnFileInfo.uFormat)
{
case ANNFMT_NATIVE:
szFormat = TEXT("ANNFMT_NATIVE");
break;
case ANNFMT_WMF:
szFormat = TEXT("ANNFMT_WMF");
break;
case ANNFMT_ENCODED:
szFormat = TEXT("ANNFMT_ENCODED");
break;
default:
szFormat = TEXT("Unknown");
break;
}
wsprintf(szMessage, TEXT("File Name: %s\nVersion: %d\nFormat: %s\nTotal Pages: %d"), szFile, AnnFileInfo.nVersion, szFormat, AnnFileInfo.nTotalPages);
MessageBox(NULL, szMessage, TEXT("Information"), MB_OK);
// Now, delete the second page
nRet = AnnContainer.DeletePageOffset((L_HFILE)&hFile, uOffset, 2);
if(nRet != SUCCESS)
return nRet;
// Again, get information about the file
AnnFileInfo.uStructSize = sizeof(ANNFILEINFO);
AnnFileInfo.nOffset = uOffset;
nRet = AnnContainer.FileInfoOffset((L_HFILE)&hFile, &AnnFileInfo, sizeof(AnnFileInfo));
if(nRet != SUCCESS)
return nRet;
wsprintf(szMessage, TEXT("File Name: %s\nVersion: %d\nFormat: %s\nTotal Pages: %d"), szFile, AnnFileInfo.nVersion, szFormat, AnnFileInfo.nTotalPages);
MessageBox(NULL, szMessage, TEXT("Information"), MB_OK);
CloseHandle(hFile);
return SUCCESS;
}
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