IntPtr DdeCallback(int uType, int uFmt, IntPtr hConv, IntPtr hsz1, IntPtr hsz2, IntPtr hData, IntPtr dwData1, IntPtr dwData2)
{
string str1 = DDEML.GetString(idInst, hsz1);
string str2 = DDEML.GetString(idInst, hsz2);
Log.Emit("dde-cb", "uType", DDEML.GetTypeString(uType), "uFmt", uFmt, "hConv", hConv, "hsz1", str1, "hsz2", str2, "hData", hData, "dwData1", dwData1, "dwData2", dwData2);
if (hConv == IntPtr.Zero)
{
return(IntPtr.Zero);
}
Conversation conversation;
if (!conversations.TryGetValue(hConv, out conversation))
{
Log.Emit("dde-cb-conv-not-found");
return(IntPtr.Zero);
}
switch (uType)
{
case DDEML.XTYP_ADVDATA:
{
conversation.AdviseReceived(str2);
return(new IntPtr(DDEML.DDE_FACK));
}
case DDEML.XTYP_XACT_COMPLETE:
{
conversation.TransactionCompleted(dwData1, str2, hData);
return(IntPtr.Zero);
}
case DDEML.XTYP_DISCONNECT:
{
conversation.Disconnected();
return(IntPtr.Zero);
}
default:
return(IntPtr.Zero);
}
}
void Transact(string itemName, int wFmt, int wType, DDETransactionCallback callback)
{
Client.dispatcher.BeginInvoke(new Action(delegate()
{
if (Handle == IntPtr.Zero)
{
return;
}
int res = 0;
using (var hsz = new DdeStringHandle(Client.idInst, itemName))
{
using (var hData = new DdeDataHandle(DDEML.DdeClientTransaction(null, 0, Handle, hsz.Handle, wFmt, wType, DDEML.TIMEOUT_ASYNC, ref res)))
{
Log.Emit("dde-transact", "hConv", this.Handle, "item", itemName, "wFmt", wFmt, "wType", DDEML.GetTypeString(wType), "callback", callback != null, "id", res);
if (hData.Handle == IntPtr.Zero)
{
var errno = DDEML.DdeGetLastError(Client.idInst);
Log.Emit("dde-transact-failed", "error", DDEML.GetErrorString(errno) + " (" + errno.ToString() + ")");
if (callback != null)
{
callback(itemName, false, null);
}
this.Disconnect();
}
else
{
if (callback != null)
{
if (res == 0)
{
callback(itemName, false, null);
}
else if (callback != null & res != 0)
{
var id = new IntPtr(res);
transactions.Add(id, new Transaction(id, callback));
}
}
}
}
}
}));
}
