2.1.12 DIBPresentationDataWidth

This MUST be a long value that contains the width of a Device Independent Bitmap object (as specified in [MS-WMF] section 2.2.2.9) in logical units. The MM_HIMETRIC mapping mode (as specified in [MS-WMF] section 2.1.1.16) MUST be used to convert the logical units to physical units.