Plays the contents of the specified metafile on the device context.
BOOL PlayMetaFile( HMETAFILE hMF ); BOOL PlayMetaFile( HENHMETAFILE hEnhMetaFile, LPCRECT lpBounds );
The metafile can be played any number of times.
The second version of PlayMetaFile displays the picture stored in the given enhanced-format metafile. When an application calls the second version of PlayMetaFile, Windows uses the picture frame in the enhanced-metafile header to map the picture onto the rectangle pointed to by the lpBounds parameter. (This picture may be sheared or rotated by setting the world transform in the output device before calling PlayMetaFile.) 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 the second version of PlayMetaFile. To retrieve the optional palette, use the GetEnhMetaFilePaletteEntries Windows function. An enhanced metafile can be embedded in a newly created enhanced metafile by calling the second version of PlayMetaFile 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 Windows function from another thread to terminate the operation. In this case, the function returns zero.