CHANNEL_PDU_HEADER (Windows Embedded CE 6.0)
1/6/2010
This structure contains information about a data block being received by the server end of a virtual channel.
Syntax
typedef struct tagCHANNEL_PDU_HEADER {
UINT32 length;
UINT32 flags;
} CHANNEL_PDU_HEADER, *PCHANNEL_PDU_HEADER;
Members
- length
Size, in bytes, of the data block, excluding this header.
flags
Information about the data block. The following table shows the bit flags that are set. Do not make direct comparisons using the == operator; use the methods described in this table to compare the corresponding flag value.Value Description CHANNEL_FLAG_FIRST
The chunk is the beginning of the data written by a single write operation.
Use bitwise comparisons when comparing this flag.
CHANNEL_FLAG_LAST
The chunk is the end of the data written by a single write operation.
Use bitwise comparisons when comparing this flag.
CHANNEL_FLAG_MIDDLE
This is the default. The chunk is in the middle of a block of data written by a single write operation.
Do not use bitwise comparisons to compare this flag value directly. Instead, use bitwise comparisons to determine that the flag value is not CHANNEL_FLAG_FIRST or CHANNEL_FLAG_LAST. This is done by using the following comparison: Result = !(flags & CHANNEL_FLAG_FIRST) && !(flags & CHANNEL_FLAG_LAST).
CHANNEL_FLAG_ONLY
Combines the CHANNEL_FLAG_FIRST and CHANNEL_FLAG_LAST values. The chunk contains all the data from a single write operation.
Use bitwise comparisons when comparing this flag.
Remarks
This structure is used if the client DLL sets the CHANNEL_OPTION_SHOW_PROTOCOL option when it calls VirtualChannelInit to initialize the virtual channel. If this option is set, a CHANNEL_PDU_HEADER structure is placed at the beginning of each chunk of data read by a call to the WTSVirtualChannelRead function.
Requirements
| Header | pchannel.h |
| Windows Embedded CE | Windows CE .NET 4.0 and later |