internal void UnregisterClient(DdemlClient client)
{
_ClientTable[client.Handle] = null;
}
private IntPtr OnDdeCallback(int uType, int uFmt, IntPtr hConv, IntPtr hsz1, IntPtr hsz2, IntPtr hData, IntPtr dwData1, IntPtr dwData2)
{
// Create a new transaction object that will be dispatched to a DdemlClient, DdemlServer, or ITransactionFilter.
DdemlTransaction t = new DdemlTransaction(uType, uFmt, hConv, hsz1, hsz2, hData, dwData1, dwData2);
// Run each transaction filter.
foreach (IDdemlTransactionFilter filter in _Filters)
{
if (filter.PreFilterTransaction(t))
{
return t.dwRet;
}
}
// Dispatch the transaction.
switch (uType)
{
case Ddeml.XTYP_ADVDATA:
{
DdemlClient client = _ClientTable[hConv] as DdemlClient;
if (client != null)
{
if (client.ProcessCallback(t))
{
return t.dwRet;
}
}
break;
}
case Ddeml.XTYP_ADVREQ:
{
DdemlServer server = _ServerTable1[hConv] as DdemlServer;
if (server != null)
{
if (server.ProcessCallback(t))
{
return t.dwRet;
}
}
break;
}
case Ddeml.XTYP_ADVSTART:
{
DdemlServer server = _ServerTable1[hConv] as DdemlServer;
if (server != null)
{
if (server.ProcessCallback(t))
{
return t.dwRet;
}
}
break;
}
case Ddeml.XTYP_ADVSTOP:
{
DdemlServer server = _ServerTable1[hConv] as DdemlServer;
if (server != null)
{
if (server.ProcessCallback(t))
{
return t.dwRet;
}
}
break;
}
case Ddeml.XTYP_CONNECT:
{
// Get the service name from the hsz2 string handle.
StringBuilder psz = new StringBuilder(Ddeml.MAX_STRING_SIZE);
int length = Ddeml.DdeQueryString(_InstanceId, hsz2, psz, psz.Capacity, Ddeml.CP_WINANSI);
string service = psz.ToString();
DdemlServer server = _ServerTable2[service] as DdemlServer;
if (server != null)
{
if (server.ProcessCallback(t))
{
return t.dwRet;
}
}
break;
}
case Ddeml.XTYP_CONNECT_CONFIRM:
{
// Get the service name from the hsz2 string handle.
StringBuilder psz = new StringBuilder(Ddeml.MAX_STRING_SIZE);
int length = Ddeml.DdeQueryString(_InstanceId, hsz2, psz, psz.Capacity, Ddeml.CP_WINANSI);
string service = psz.ToString();
DdemlServer server = _ServerTable2[service] as DdemlServer;
if (server != null)
{
_ServerTable1[hConv] = server;
if (server.ProcessCallback(t))
{
return t.dwRet;
}
}
break;
}
case Ddeml.XTYP_DISCONNECT:
{
DdemlClient client = _ClientTable[hConv] as DdemlClient;
if (client != null)
{
_ClientTable[hConv] = null;
if (client.ProcessCallback(t))
{
return t.dwRet;
}
}
DdemlServer server = _ServerTable1[hConv] as DdemlServer;
if (server != null)
{
_ServerTable1[hConv] = null;
if (server.ProcessCallback(t))
{
return t.dwRet;
}
}
break;
}
case Ddeml.XTYP_EXECUTE:
{
DdemlServer server = _ServerTable1[hConv] as DdemlServer;
if (server != null)
{
if (server.ProcessCallback(t))
{
return t.dwRet;
}
}
break;
}
case Ddeml.XTYP_POKE:
{
DdemlServer server = _ServerTable1[hConv] as DdemlServer;
if (server != null)
{
if (server.ProcessCallback(t))
{
return t.dwRet;
}
}
break;
}
case Ddeml.XTYP_REQUEST:
{
DdemlServer server = _ServerTable1[hConv] as DdemlServer;
if (server != null)
{
if (server.ProcessCallback(t))
{
return t.dwRet;
}
}
break;
}
case Ddeml.XTYP_XACT_COMPLETE:
{
DdemlClient client = _ClientTable[hConv] as DdemlClient;
if (client != null)
{
if (client.ProcessCallback(t))
{
return t.dwRet;
}
}
break;
}
case Ddeml.XTYP_WILDCONNECT:
{
// This library does not support wild connects.
return IntPtr.Zero;
}
case Ddeml.XTYP_MONITOR:
{
// Monitors are handled separately in DdemlMonitor.
return IntPtr.Zero;
}
case Ddeml.XTYP_ERROR:
{
// Get the error code, but do nothing with it at this time.
int error = dwData1.ToInt32();
return IntPtr.Zero;
}
case Ddeml.XTYP_REGISTER:
{
if (Register != null)
{
// Get the service name from the hsz1 string handle.
StringBuilder psz = new StringBuilder(Ddeml.MAX_STRING_SIZE);
int length = Ddeml.DdeQueryString(_InstanceId, hsz1, psz, psz.Capacity, Ddeml.CP_WINANSI);
string service = psz.ToString();
Register(this, new DdemlRegistrationEventArgs(service));
}
return IntPtr.Zero;
}
case Ddeml.XTYP_UNREGISTER:
{
if (Unregister != null)
{
// Get the service name from the hsz1 string handle.
StringBuilder psz = new StringBuilder(Ddeml.MAX_STRING_SIZE);
int length = Ddeml.DdeQueryString(_InstanceId, hsz1, psz, psz.Capacity, Ddeml.CP_WINANSI);
string service = psz.ToString();
Unregister(this, new DdemlRegistrationEventArgs(service));
}
return IntPtr.Zero;
}
}
return IntPtr.Zero;
}
internal void RegisterClient(DdemlClient client)
{
_ClientTable[client.Handle] = client;
}
