2.3.6 Escape Record Types
The Escape record types execute printer driver functions.
The following are EMF escape record types.
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Name |
Section |
Description |
|---|---|---|
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EMR_DRAWESCAPE |
Passes arbitrary information to the printer driver. The intent is that the information results in drawing being done. |
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EMR_EXTESCAPE |
Passes arbitrary information to the printer driver. The intent is that the information does not result in drawing being done. |
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EMR_NAMEDESCAPE |
Passes arbitrary information to the given named printer driver. |
The generic structure of escape records is specified as follows.
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1 |
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2 |
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3 |
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Type |
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Size |
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iEscape |
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EscapeRecordBuffer (variable) |
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... |
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Type (4 bytes): An unsigned integer that defines the type of the record. The escape record types are listed in the following table. See the preceding table for descriptions of these records.
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Name
Value
EMR_DRAWESCAPE
0x00000069
EMR_EXTESCAPE
0x0000006A
EMR_NAMEDESCAPE
0x0000006E
Size (4 bytes): An unsigned integer that specifies the size in bytes of this record in the metafile. This value MUST be a multiple of 4 bytes.
iEscape (4 bytes): An unsigned integer that specifies the printer driver escape to execute. This MUST be one of the values in the MetafileEscapes enumeration ([MS-WMF] section 2.1.1.17).
EscapeRecordBuffer (variable): An array of bytes that contains the remainder of the escape record.
-
0
1
2
3
4
5
6
7
8
91
0
1
2
3
4
5
6
7
8
92
0
1
2
3
4
5
6
7
8
93
0
1EscapeRecordParm (variable)
...
AlignmentPadding (variable, optional)
...
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EscapeRecordParm (variable): An array of bytes that contains the parameters for the escape record.
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AlignmentPadding (variable, optional): An array of up to 3 bytes that pads the record so that its total size is a multiple of 4 bytes. This field MUST be ignored.
See section 2.3 for more EMF record types.