ID Number: Q71229
3.00
MS-DOS
Summary:
The coordinates of Windows regions are in device units, not logical
units. Therefore, if the mapping mode is not MM_TEXT, region
coordinates do not scale as would be expected. This causes particular
problems in metafiles because metafiles often use MM_ISOTROPIC or
MM_ANISOTROPIC modes to make pictures appear the same on devices with
different resolutions.
To work around this problem, applications should avoid using regions
if the mapping mode is changed from MM_TEXT. Regions should also be
avoided in metafiles, unless the application knows the scaling factor
and can adjust region coordinates itself.
More Information:
If the applications that will read and write the metafile are
developed together, the writing application can include an MFCOMMENT
escape in the metafile to store the region components. This
information can be used by the reading application to scale the
metafile.
However, this comment is not standard across all applications. This
method would not be expected to work if the metafile is imported into
a commercial application.