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Problem
The metafiles generated by Objective Grid are not read by some applications including Word 6. Why does this happen?
Cause
These applications expect the .wmf file to have a placeable header.
Action
The code for adding this header is as below:
| // .h file
typedef struct tagOLDRECT |
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| short left; short top; short right; short bottom; |
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| } OLDRECT;
typedef struct |
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| DWORD key; WORD hmf; OLDRECT bbox; WORD inch; DWORD reserved; WORD checksum; |
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| } ALDUSMFHEADER;
// .cpp file #define ALDUSSIZE 22 BOOL CServ3View::WriteMetaFileAsPlaceable(HMETAFILE hMetaFile, LPCTSTR lpstrOutFileName) |
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| HANDLE hOutFile; ALDUSMFHEADER APMFileHeader; METAHEADER mh; // Fill out the placeable header // Get the bits // Open the file |
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| lpstrOutFileName, // pointer to name of the file GENERIC_WRITE, // access (read-write) mode 0, // share mode NULL, // pointer to security descriptor CREATE_ALWAYS, // how to create FILE_ATTRIBUTE_NORMAL, // file attributes NULL // handle to file with attributes to copy ); |
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| if(!hOutFile) | |||
| return FALSE; | |||
| DWORD dwNumBytes;
// Write the header |
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| CloseHandle((HANDLE)hOutFile); AfxMessageBox(_T("1 write fails")); return FALSE; |
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| }
// Write the header if (!WriteFile((HANDLE)hOutFile, (void*)&mh, sizeof(mh), &dwNumBytes, NULL)) |
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| CloseHandle( (HANDLE)hOutFile ); AfxMessageBox(_T("1 write fails")); return FALSE; |
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| }
pBuffer +=METASIZE; // Write the bits |
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| CloseHandle((HANDLE)hOutFile); AfxMessageBox(_T("2 write fails")); return FALSE; |
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| }
// Close the file // clean up return TRUE; |
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| }
WORD CServ3View::CalculateAPMCheckSum(ALDUSMFHEADER apmfh) |
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| LPWORD lpWord; WORD wResult, i; // Start with the first word // XOR in each of the other 9 words |
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| wResult ^= lpWord[i]; | |||
| }
return wResult; |
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| } | |||
