The GetEnhMetaFileHeader function retrieves the record containing the header for the specified enhanced-format metafile.
UINT GetEnhMetaFileHeader(
HENHMETAFILE hemf, |
// handle of enhanced metafile |
UINT cbBuffer, |
// size of buffer, in bytes |
LPENHMETAHEADER lpemh |
// address of buffer to receive data |
); |
If the function succeeds and the structure pointer is NULL, the return value is the size of the record that contains the header; if the structure pointer is a valid pointer, the return value is the number of bytes copied. Otherwise, it is zero. To get extended error information, call GetLastError.
An enhanced-metafile header contains such information as the metafile’s size, in bytes; the dimensions of the picture stored in the metafile; the number of records stored in the metafile; the offset to the optional text description; the size of the optional palette, and the resolution of the device on which the picture was created.
The record that contains the enhanced-metafile header is always the first record in the metafile.
Windows 95: The maximum length of the description string for an enhanced metafile is 16,384 bytes.
ENHMETAHEADER, PlayEnhMetaFile
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