6 Appendix A: Product Behavior
The information in this specification is applicable to the following Microsoft products or supplemental software. References to product versions include updates to those products.
Windows NT operating system
Windows 2000 operating system
Windows XP operating system
Windows Server 2003 operating system
Windows Vista operating system
Windows Server 2008 operating system
Windows 7 operating system
Windows Server 2008 R2 operating system
Windows Server 2008 R2 operating system with Service Pack 1 (SP1)
Windows 7 operating system with Service Pack 1 (SP1)
Windows 8 operating system
Windows Server 2012 operating system
Windows 8.1 operating system
Windows Server 2012 R2 operating system
Windows 10 operating system
Windows Server 2016 operating system
Windows Server operating system
Windows Server 2019 operating system
Windows Server 2022 operating system
Windows 11 operating system
Windows Server 2025 operating system
Exceptions, if any, are noted in this section. If an update version, service pack or Knowledge Base (KB) number appears with a product name, the behavior changed in that update. The new behavior also applies to subsequent updates unless otherwise specified. If a product edition appears with the product version, behavior is different in that product edition.
Unless otherwise specified, any statement of optional behavior in this specification that is prescribed using the terms "SHOULD" or "SHOULD NOT" implies product behavior in accordance with the SHOULD or SHOULD NOT prescription. Unless otherwise specified, the term "MAY" implies that the product does not follow the prescription.
<1> Section 2.2.2.2.1.1.1.4: The Windows implementation of Remote Desktop Protocol: GDI Acceleration Extension places the field that contains the number of Delta-Encoded Points immediately before order encoding packets containing a DELTA_PTS_FIELD structure.
<2> Section 2.2.2.2.1.1.2.15: This Unicode value is only for debugging purposes and is not always accurate in Microsoft RDP implementations.
<3> Section 2.2.2.2.1.1.2.18: The Windows implementation of RDP set this field to 0x0000.
<4> Section 2.2.2.2.1.2.7: The Windows implementation of Remote Desktop Protocol: Graphics Devices Interfaces (GDI) Acceleration Extension sets this field to 0x00.
<5> Section 2.2.2.2.1.3.3: Section 2.2.2.2.1.3.3: It is possible that the bitmapId field sent by the Windows implementation of RDP identifies a nonexistent or deleted bitmap. In this case, a substitute surface that is the same size as the virtual desktop is used as the target of the switch operation.