The CONVINFO structure contains information about a DDE conversation.
typedef struct tagCONVINFO { // ci
DWORD cb;
DWORD hUser;
HCONV hConvPartner;
HSZ hszSvcPartner;
HSZ hszServiceReq;
HSZ hszTopic;
HSZ hszItem;
UINT wFmt;
UINT wType;
UINT wStatus;
UINT wConvst;
UINT wLastError;
HCONVLIST hConvList;
CONVCONTEXT ConvCtxt;
HWND hwnd;
HWND hwndPartner;
} CONVINFO;
Members
cb
Specifies the structure's size, in bytes.
hUser
Identifies application-defined data.
hConvPartner
Identifies the partner application in the DDE conversation. This member is zero if the partner has not registered itself (using the DdeInitialize function) to make DDE Management Library (DDEML) function calls. An application should not pass this member to any DDEML function except DdeQueryConvInfo.
hszSvcPartner
Identifies the service name of the partner application.
hszServiceReq
Identifies the service name of the server application that was requested for connection.
hszTopic
Identifies the name of the requested topic.
hszItem
Identifies the name of the requested item. This member is transaction specific.
wFmt
Specifies the format of the data being exchanged. This member is transaction specific.
wType
Specifies the type of the current transaction. This member is transaction specific; it can be one of the following values:
| Value | Meaning |
| XTYP_ADVDATA | Informs a client that advise data from a server has arrived. |
| XTYP_ADVREQ | Requests a server to send updated data to the client during an advise loop. This transaction results when the server calls DdePostAdvise. |
| XTYP_ADVSTART | Requests a server to begin an advise loop with a client. |
| XTYP_ADVSTOP | Notifies a server that an advise loop is stopping. |
| XTYP_CONNECT | Requests a server to establish a conversation with a client. |
| XTYP_CONNECT_CONFIRM | Notifies a server that a conversation with a client has been established. |
| XTYP_DISCONNECT | Notifies a server that a conversation has terminated. |
| XTYP_EXECUTE | Requests a server to execute a command sent by a client. |
| XTYP_MONITOR | Notifies an application registered as APPCMD_MONITOR that DDE data is being transmitted. |
| XTYP_POKE | Requests a server to accept unsolicited data from a client. |
| XTYP_REGISTER | Notifies other DDEML applications that a server has registered a service name. |
| XTYP_REQUEST | Requests a server to send data to a client. |
| XTYP_UNREGISTER | Notifies other DDEML applications that a server has unregistered a service name. |
| XTYP_WILDCONNECT | Requests a server to establish multiple conversations with the same client. |
| XTYP_XACT_COMPLETE | Notifies a client that an asynchronous data transaction has been completed. |
wStatus
Specifies the status of the current conversation. This member can be a combination of the following values:
| Value | Meaning |
| ST_ADVISE | One or more links are in progress. |
| ST_BLOCKED | The conversation is blocked. |
| ST_BLOCKNEXT | The conversation will block after calling the next callback. |
| ST_CLIENT | The conversation handle passed to the DdeQueryConvInfo function is a client-side handle. If the handle is zero, the conversation handle passed to the DdeQueryConvInfo function is a server-side handle. |
| ST_CONNECTED | The conversation is connected. |
| ST_INLIST | The conversation is a member of a conversation list. |
| ST_ISLOCAL | Both sides of the conversation are using the DDEML. |
| ST_ISSELF | Both sides of the conversation are using the same instance of the DDEML. |
| ST_TERMINATED | The conversation has been terminated by the partner. |
wConvst
Specifies the conversation state. This member can be one of the following values:
| Value | Meaning |
| XST_ADVACKRCVD | The advise transaction has just been completed. |
| XST_ADVDATAACKRCVD | The advise data transaction has just been completed. |
| XST_ADVDATASENT | Advise data has been sent and is awaiting an acknowledgement. |
| XST_ADVSENT | An advise transaction is awaiting an acknowledgement. |
| XST_CONNECTED | The conversation has no active transactions. |
| XST_DATARCVD | The requested data has just been received. |
| XST_EXECACKRCVD | An execute transaction has just been completed. |
| XST_EXECSENT | An execute transaction is awaiting an acknowledgement. |
| XST_INCOMPLETE | The last transaction failed. |
| XST_INIT1 | Mid-initiate state 1. |
| XST_INIT2 | Mid-initiate state 2. |
| XST_NULL | Pre-initiate state. |
| XST_POKEACKRCVD | A poke transaction has just been completed. |
| XST_POKESENT | A poke transaction is awaiting an acknowledgement. |
| XST_REQSENT | A request transaction is awaiting an acknowledgement. |
| XST_UNADVACKRCVD | An unadvise transaction has just been completed. |
| XST_UNADVSENT | An unadvise transaction is awaiting an acknowledgement. |
wLastError
Specifies the error value associated with the last transaction.
hConvList
Identifies the conversation list if the handle of the current conversation is in a conversation list. This member is NULL if the conversation is not in a conversation list.
ConvCtxt
Specifies the conversation context.
hwnd
Identifies the window of the calling application involved in the conversation.
hwndPartner
Identifies the window of the partner application involved in the current conversation.
See Also