PowerBASIC 语法

 

UNION MetafileHeader_UNION

WmfHeader AS METAHEADER

EmfHeader AS ENHMETAHEADER3

END UNION

 

TYPE MetafileHeader

nType AS DWORD            ' // The type of the associated metafile

nSize AS DWORD            ' // Size of the metafile (in bytes)

Version AS DWORD          ' // EMF+, EMF, or WMF version

EmfPlusFlags AS DWORD

DpiX AS SINGLE

DpiY AS SINGLE

X AS LONG                 ' // Bounds in device units

Y AS LONG

nWidth AS LONG

nHeight AS LONG

MetafileHeader_UNION

EmfPlusHeaderSize AS LONG ' // size of the EMF+ header in file

LogicalDpiX AS LONG       ' // Logical Dpi of reference Hdc

LogicalDpiY AS LONG       ' // usually valid only for EMF+

END TYPE

 

备注

 

图元文件提供独立于设备的应用程序独立方式来分享图片。它们包含描述一系列图形应用程序编程接口（API）的记录，以便按照特定顺序调用其相关联的图形数据。图元文件可以由应用程序记录，稍后由该应用程序或另一个应用程序进行播放以再现特定图片。它们也可以用于将内容发送到打印后台处理程序。增强的图元文件支持同时提供Microsoft Windows GDI +和Windows图形设备接口（GDI）描述的能力，以便GDI +和下级GDI应用程序可以呈现。