CONNMGR_CONNECTIONINFO (Windows Embedded CE 6.0)

1/6/2010

This structure provides information about a connection request.

Syntax

typedef struct {
  DWORD cbSize;
  DWORD dwParams;
  DWORD dwFlags;
  DWORD dwPriority;
  BOOL bExclusive;
  BOOL bDisabled;
  GUID guidDestNet;
  HWND hWnd;
  UINT uMsg;
  LPARAM lParam;
  ULONG ulMaxCost;
  ULONG ulMinRcvBw;
  ULONG ulMaxConnLatency
} CONNMGR_CONNECTIONINFO;

Members

• cbSize
  Specifies the size of this structure.

• dwParams
  Specifies valid parameters. Can be one or more of the Connection Manager parameter constants. For detailed information, see Connection Manager Parameter Constants.

• dwFlags
  Specifies connection flags. Can be one or more of the Connection Manager proxy flag constants or the Connection Manager control flag constants. For detailed information, see Connection Manager Proxy Flag Constants and Connection Manager Control Flag Constants.

  This member allows Connection Planner to use various types of proxies when determining the best path to the destination network. Specifying a proxy will not negatively impact an application running on a device with no proxies established.

• dwPriority
  Specifies priority. Can be one of the Connection Manager priority constants. For detailed information, see Connection Manager Priority Constants.

• bExclusive
  Specifies whether the connection is exclusive or not.

  If this parameter is TRUE, this connection cannot be shared with other applications, no other applications are notified, and any application requesting a connection to the same network is treated as a contender for the same resource and is not permitted to share the existing connection. A decision is made between this connection and the others based on connection priority. If this parameter is FALSE, the connection is shared among all applications and other applications with an interest in a connection to this network are notified that the connection is available.

• bDisabled
  Specifies whether the connection is disabled or not.

  If this parameter is TRUE, Connection Manager determines whether a connection can be made, although the ability to connect is disabled. When Connection Manager reaches the point when it would normally establish a connection, it sets the connection status to CONNMGR_STATUS_CONNECTIONDISABLED.

• guidDestNet
  Specifies the GUID of the network to which to connect.

• hWnd
  Optional window handle to which Connection Manager posts status change messages. If this member is 0, Connection Manager does not post status messages to a window. Regardless of the value of this member, an application can always call ConnMgrConnectionStatus to retrieve the current status of a connection.

• uMsg
  Specifies the message to use to post status changes.

• lParam
  Specifies the value that is put into the lParam field of the message when posting status changes to a window.

• ulMaxCost
  Specifies the maximum acceptable cost of connection. If this optional member is valid, then the dwFlags member will contain CONNMGR_PARAM_MAXCOST.

• ulMinRcvBw
  Specifies the minimum acceptable reception bandwidth of the connection. If this optional member is valid, then the dwFlags member will contain CONNMGR_PARAM_MINRCVBW.

• ulMaxConnLatency
  Specifies the maximum acceptable connection latency. If this optional member is valid, then the dwFlags member will contain CONNMGR_PARAM_MAXCONNLATENCY.

Remarks

Each CONNMGR_FLAG_PROXY_* flag in dwFlags means that a connection can be specified by configuring an appropriate proxy server (for example, Hypertext Transfer Protocol (HTTP)). This value is appropriate for Microsoft Internet Explorer and other HTTP-based protocols, including HTTP-DAV synchronization. If none of these flags are specified, only a direct IP connection, also called a tunnel, is attempted.

Connection Manager arbitrates among multiple connections, satisfying as many as possible at a time but giving preference to higher priority connection types.

There are four GUID values for the default networks on the device; these values are defined in the Connmgr.h header file.

Before referencing any of these GUID values, #define INITGUID must be provided before the Connmgr.h header file is included.

Requirements

See Also

Reference

Connection Manager Structures
Connection Manager Parameter Constants
Connection Manager Proxy Flag Constants
Connection Manager Priority Constants

Other Resources