DPN_CAPS_EX Structure

Used when setting and retrieving parameters to tune the Microsoft?DirectPlay?protocol.

Syntax

typedef struct _DPN_CAPS_EX {
    DWORD dwSize;
    DWORD dwFlags;
    DWORD dwConnectTimeout;
    DWORD dwConnectRetries;
    DWORD dwTimeoutUntilKeepAlive;
    DWORD dwMaxRecvMsgSize;
    DWORD dwNumSendRetries;
    DWORD dwMaxSendRetryInterval;
    DWORD dwDropThresholdRate;
    DWORD dwThrottleRate;
    DWORD dwNumHardDisconnectSends;
    DWORD dwMaxHardDisconnectPeriod;
} DPN_CAPS_EX, *PDPN_CAPS_EX;

Members

dwSize

Value, which must be set to the size of the structure.

dwFlags

Reserved; this must be 0.

dwConnectTimeout

Number of milliseconds DirectPlay should wait before it retries a connection request.

dwConnectRetries

Number of connection retries DirectPlay should make during the connection process.

dwTimeoutUntilKeepAlive

Number of milliseconds DirectPlay waits since the last time it received a packet from an endpoint, before it sends a keep-alive message. The actual delay can vary from the specified value to as much as twice the specified value.

dwMaxRecvMsgSize

Maximum size of received messages, in bytes.

dwNumSendRetries

Maximum number of times applications can try to send a message before the connection is considered dead.

dwMaxSendRetryInterval

Maximum number of milliseconds between attempts to resend messages.

dwDropThresholdRate

Percentage of dropped packets allowed before Message Throttling is applied.

dwThrottleRate

Percentage to reduce the send queue when applying message throttling.

dwNumHardDisconnectSends

Number of hard disconnect frames to send when the DPNCLOSE_IMMEDIATE flag is specified.

dwMaxHardDisconnectPeriod

Maximum time, in milliseconds, between each hard disconnect frame sent.

Remarks

When using the DPN_CAPS_EX structure with IDirectPlay8Peer or IDirectPlay8Client objects, the dwMaxRecvMsgSize member is ignored. Callback functions for IDirectPlay8Peer and IDirectPlay8Client will receive messages of any size, even those larger than dwMaxRecvMsgSize.

Structure Information

Header	dplay8.h
Minimum operating systems	Windows 98, Pocket PC 2002