CALLTYPE
The CALLTYPE
enumeration constant specifies the call types used by IMessageFilter::HandleInComingCall.
typedef enum tagCALLTYPE
{
CALLTYPE_TOPLEVEL = 1,
CALLTYPE_NESTED = 2,
CALLTYPE_ASYNC = 3,
CALLTYPE_TOPLEVEL_CALLPENDING
= 4,
CALLTYPE_ASYNC_CALLPENDING = 5
} CALLTYPE;
Elements
CALLTYPE_TOPLEVEL
A top-level
call has arrived and that the object is not currently waiting for a reply from
a previous outgoing call. Calls of this type should always be handled.
CALLTYPE_NESTED
A call has arrived
bearing the same logical thread identifier as that of a previous outgoing call
for which the object is still awaiting a reply. Calls of this type should
always handled.
CALLTYPE_ASYNC
An
aysnchronous call has arrived. Calls of this type cannot be rejected. OLE
always delivers calls of this type.
CALLTYPE_TOPLEVEL_CALLPENDING
A new
top-level call has arrived with a new logical thread identifier and that the
object is currently waiting for a reply from a previous outgoing call. Calls of
this type may be handled or rejected.
CALLTYPE_ASYNC_CALLPENDING
An
asynchronous call has arrived with a new logical thread identifier and that the
object is currently waiting for a reply from a previous outgoing call. Calls of
this type cannot be rejected.
async call - can NOT be rejected
See Also