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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| No
| Import Library
| gdi32.lib
| Header File
| wingdi.h
| Unicode
| No
| Platform Notes
| Windows 95: Skips records which couldn't be processed under Windows 95's GDI:
greater than 16-bit coordinates, no shearing or rotations, no dashed widelines,
etc.
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PlayEnhMetaFile
The PlayEnhMetaFile function displays the picture stored in the specified enhanced-format
metafile.
BOOL PlayEnhMetaFile(
HDC hdc,
| // handle to a device context
| HENHMETAFILE hemf,
| // handle to an enhanced metafile
| CONST RECT *lpRect
| // pointer to bounding rectangle
| );
|
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Parameters
hdc
Identifies the device context for the output device on which the picture will
appear.
hemf
Identifies the enhanced metafile.
lpRect
Points to a RECT structure that contains the coordinates of the bounding rectangle used to
display the picture. The coordinates are specified in logical units.
Return Values
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error
information, call GetLastError.
Remarks
When an application calls the PlayEnhMetaFile function, Windows uses the picture frame in the enhanced-metafile header to
map the picture onto the rectangle pointed to by the lpRect parameter. (This picture may be sheared or rotated by setting the world
transform in the output device before calling PlayEnhMetaFile.) Points along the edges of the rectangle are included in the picture.
An enhanced-metafile picture can be clipped by defining the clipping region in
the output device before playing the enhanced metafile.
If an enhanced metafile contains an optional palette, an application can
achieve consistent colors by setting up a color palette on the output device before
calling PlayEnhMetaFile. To retrieve the optional palette, use the GetEnhMetaFilePaletteEntries function.
An enhanced metafile can be embedded in a newly created enhanced metafile by
calling PlayEnhMetaFile and playing the source enhanced metafile into the device context for the new
enhanced metafile.
The states of the output device context are preserved by this function. Any
object created but not deleted in the enhanced metafile is deleted by this
function.
To stop this function, an application can call the CancelDC function from another thread to terminate the operation. In this case, the
function returns FALSE.
Windows 95: PlayEnhMetaFile is subject to the limitations of the Windows 95 GDI. For example, Windows 95
supports only 16-bit signed coordinates. For records that contain 32-bit
values, Windows 95 fails to play the record if the values are not in the range
-32,768 to 32,767.
See Also
CancelDC, GetEnhMetaFileHeader, GetEnhMetaFilePaletteEntries, RECT, SetWorldTransform
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