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Windows-Format Metafiles

Microsoft Windows-format metafiles are limited in their capabilities and should rarely be used. The Windows-format functions are supported to maintain backward compatibility with applications that were written to run as 16 bit Windows-based applications. Instead, you should use the enhanced-format functions.

A Windows-format metafile is used by 16-bit Windows-based applications. The format consists of a header and an array of metafile records.

The following are the limitations of this format:

  • A Windows-format metafile is application and device dependent. Changes in the application's mapping modes or the device resolution affect the appearance of metafiles created in this format.
  • A Windows-format metafile does not contain a comprehensive header that describes the original picture dimensions, the resolution of the device on which the picture was created, an optional text description, or an optional palette.
  • A Windows-format metafile does not support the new curve, path, and transformation functions. See the list of supported functions in the table that follows.
  • Some Windows-format metafile records cannot be scaled.
  • The metafile device context associated with a Windows-format metafile cannot be queried (that is, an application cannot retrieve device-resolution data, font metrics, and so on).

The following are the only functions that are supported by Windows-format metafiles.

AnimatePalette

Arc

BitBlt

Chord

CreateBrushIndirect

CreateDIBPatternBrush

CreateFontIndirect

CreatePalette

CreatePatternBrush

CreatePenIndirect

DeleteObject

Ellipse

Escape

ExcludeClipRect

ExtFloodFill

ExtTextOut

FillRgn

FloodFill

FrameRgn

IntersectClipRect

InvertRgn

LineTo

MoveToEx

OffsetClipRgn

OffsetViewportOrgEx

OffsetWindowOrgEx

PaintRgn

PatBlt

Pie

Polygon

Polyline

PolyPolygon

RealizePalette

Rectangle

ResizePalette

RestoreDC

RoundRect

SaveDC

ScaleViewportExtEx

ScaleWindowExtEx

SelectClipRgn

SelectObject

SelectPalette

SetBkColor

SetBkMode

SetDIBitsToDevice

SetMapMode

SetMapperFlags

SetPaletteEntries

SetPixel

SetPolyFillMode

SetROP2

SetStretchBltMode

SetTextAlign

SetTextCharacterExtra

SetTextColor

SetTextJustification

SetViewportOrgEx

SetWindowExtEx

SetWindowOrgEx

StretchBlt

StretchDIBits

TextOut

 

To convert a Windows-format metafile to an enhanced-format metafile, call the GetMetaFileBitsEx function to retrieve the data from the Windows-format metafile and then call the SetWinMetaFileBits function to convert this data into an enhanced-format metafile. To convert an enhanced-format record into a Windows-format record, call the GetWinMetaFileBits function.

 

 

Build date: 6/12/2013

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