CopyMetaFile() Creates Incorrectly Sized Destination

ID: Q82232

The information in this article applies to:

Microsoft Windows Software Development Kit (SDK) 3.1

SUMMARY

When an application calls CopyMetaFile() to create a copy of a metafile, the size of the metafile is listed incorrectly in the destination metafile. The destination size is three words larger than the source metafile.

MORE INFORMATION

The debugging version of Windows 3.1 contains code to validate the size of a memory metafile. This code walks through every record in a metafile and computes the total size. The code compares the computed size with the size listed in the header. If the sizes do not match, the debugging version of Windows displays the following message:

Metafile has incorrect size

In most cases, this message indicates a corrupted or incorrectly formed metafile. However, this message is also generated as a result of copying an existing metafile due to the problem detailed above.

NOTE: By itself, the "metafile has incorrect size" message is harmless and can be safely ignored. However, under certain circumstances, the debugging version of Windows will also display the following message:

Metafile is not terminated properly

This message indicates a more serious problem because, as the validation code walked through the array of metafile records, it did not locate a terminator record. An attempt to play an improperly terminated metafile usually results in a General Protection Fault (GP-Fault). To prevent this fault, GDI aborts the call to PlayMetaFile and returns failure.

Additional query words: 3.10

Keywords : kb16bitonly
Version : WINDOWS:3.1
Platform : WINDOWS
Issue type :