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以下为EMF版（Access 2000及更高版本）的PictureData结构：
'PictureData信息头
PictureData(0-7) PictureData信息头
'EMF信息头
PictureData(8) iType As Long
PictureData(12) nSize As Long
PictureData(16) rclBounds{Long,Long,Long,Long}
PictureData(32) rclFrame{Long,Long,Long,Long}
PictureData(48) dSignature As Long
PictureData(52) nVersion As Long
PictureData(56) nBytes As Long
PictureData(60) nRecords As Long
PictureData(64) nHandles As Integer
PictureData(66) sReserved As Integer
PictureData(68) nDescription As Long
PictureData(72) offDescription As Long
PictureData(76) nPalEntries As Long
PictureData(80) szlDevice{Width As Long,Height As Long}
PictureData(88) szlMillimeters{Long,Long}
PictureData(96) cbPixelFormat As Long
PictureData(100) offPixelFormat As Long
PictureData(104) bOpenGL As Long
PictureData(108) szMicroMeters{Long,Long}
'EMF数据段
PictureData(116)～结尾
【PictureData信息头】
PictureData(0)指定整个图形的格式：
DIB：设备无关图元（=40），文件头长度为40，其后为像素数据。
WMF：Windows MetaFile（＝3），文件头长度为8，其后为WMF。
EMF：Enhanced MetaFile（＝14），文件头长度为8，其后为EMF。
Access97及以下版本使用DIB和WMF，Access 2000及以上版本使用DIB/WMF/EMF。
【EMF信息头】
iType指定BMP版本：
BMP3.0：BITMAPINFOHEADER（=40）也就是DIB
BMP4.0：BITMAPV4HEADER（=108）
BMP5.0：BITMAPV5HEADER（=124）
实际上，iType等价于文件头的长度，PictureData(8)～PictureData(8+iType)即图形信息头的全部内容。
【EMF数据段】
由多条EMF记录（EMR）构成，每条记录均包含EMR定义和EMR参数。（EMF信息头其实也是一条特殊的EMR，同样符合EMR格式定义）
EMR定义：
iType As Long
nSize As Long
EMR.iType
EMR_HEADER 1
EMR_POLYBEZIER 2
EMR_POLYGON 3
EMR_POLYLINE 4
EMR_POLYBEZIERTO 5
EMR_POLYLINETO 6
EMR_POLYPOLYLINE 7
EMR_POLYPOLYGON 8
EMR_SETWINDOWEXTEX 9
EMR_SETWINDOWORGEX 10
EMR_SETVIEWPORTEXTEX 11
EMR_SETVIEWPORTORGEX 12
EMR_SETBRUSHORGEX 13
EMR_EOF 14
EMR_SETPIXELV 15
EMR_SETMAPPERFLAGS 16
EMR_SETMAPMODE 17
EMR_SETBKMODE 18
EMR_SETPOLYFILLMODE 19
EMR_SETROP2 20
EMR_SETSTRETCHBLTMODE 21
EMR_SETTEXTALIGN 22
EMR_SETCOLORADJUSTMENT 23
EMR_SETTEXTCOLOR 24
EMR_SETBKCOLOR 25
EMR_OFFSETCLIPRGN 26
EMR_MOVETOEX 27
EMR_SETMETARGN 28
EMR_EXCLUDECLIPRECT 29
EMR_INTERSECTCLIPRECT 30
EMR_SCALEVIEWPORTEXTEX 31
EMR_SCALEWINDOWEXTEX 32
EMR_SAVEDC 33
EMR_RESTOREDC 34
EMR_SETWORLDTRANSFORM 35
EMR_MODIFYWORLDTRANSFORM 36
EMR_SELECTOBJECT 37
EMR_CREATEPEN 38
EMR_CREATEBRUSHINDIRECT 39
EMR_DELETEOBJECT 40
EMR_ANGLEARC 41
EMR_ELLIPSE 42
EMR_RECTANGLE 43
EMR_ROUNDRECT 44
EMR_ARC 45
EMR_CHORD 46
EMR_PIE 47
EMR_SELECTPALETTE 48
EMR_CREATEPALETTE 49
EMR_SETPALETTEENTRIES 50
EMR_RESIZEPALETTE 51
EMR_REALIZEPALETTE 52
EMR_EXTFLOODFILL 53
EMR_LINETO 54
EMR_ARCTO 55
EMR_POLYDRAW 56
EMR_SETARCDIRECTION 57
EMR_SETMITERLIMIT &nbs
p; 58
EMR_BEGINPATH 59
EMR_ENDPATH 60
EMR_CLOSEFIGURE 61
EMR_FILLPATH 62
EMR_STROKEANDFILLPATH 63
EMR_STROKEPATH 64
EMR_FLATTENPATH 65
EMR_WIDENPATH 66
EMR_SELECTCLIPPATH 67
EMR_ABORTPATH 68
EMR_GDICOMMENT 70
EMR_FILLRGN 71
EMR_FRAMERGN 72
EMR_INVERTRGN 73
EMR_PAINTRGN 74
EMR_EXTSELECTCLIPRGN 75
EMR_BITBLT 76
EMR_STRETCHBLT 77
EMR_MASKBLT 78
EMR_PLGBLT 79
EMR_SETDIBITSTODEVICE 80
EMR_STRETCHDIBITS 81
EMR_EXTCREATEFONTINDIRECTW 82
EMR_EXTTEXTOUTA 83
EMR_EXTTEXTOUTW 84
EMR_POLYBEZIER16 85
EMR_POLYGON16 86
EMR_POLYLINE16 87
EMR_POLYBEZIERTO16 88
EMR_POLYLINETO16 89
EMR_POLYPOLYLINE16 90
EMR_POLYPOLYGON16 91
EMR_POLYDRAW16 92
EMR_CREATEMONOBRUSH 93
EMR_CREATEDIBPATTERNBRUSHPT 94
EMR_EXTCREATEPEN 95
EMR_POLYTEXTOUTA 96
EMR_POLYTEXTOUTW 97
以下只用于Windows 95/98/ME/NT/2000/XP（Windows 4.0以上）
EMR_SETICMMODE 98
EMR_CREATECOLORSPACE 99
EMR_SETCOLORSPACE 100
EMR_DELETECOLORSPACE 101
EMR_GLSRECORD 102
EMR_GLSBOUNDEDRECORD 103
EMR_PIXELFORMAT 104
以下只用于Windows NT/2000/XP（Windows 5.0以上）
EMR_DRAWESCAPE 105
EMR_EXTESCAPE 106
EMR_STARTDOC 107
EMR_SMALLTEXTOUT 108
EMR_FORCEUFIMAPPING 109
EMR_NAMEDESCAPE 110
EMR_COLORCORRECTPALETTE 111
EMR_SETICMPROFILEA 112
EMR_SETICMPROFILEW 113
EMR_ALPHABLEND 114
EMR_ALPHADIBBLEND 115
EMR_TRANSPARENTBLT 116
EMR_TRANSPARENTDIB 117
EMR_GRADIENTFILL 118
EMR_SETLINKEDUFIS 119
EMR_SETTEXTJUSTIFICATION 120
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