public void Advise(string topic, string item)
{
if (IsDisposed)
{
throw new ObjectDisposedException(this.GetType().ToString());
}
if (!IsRegistered)
{
throw new InvalidOperationException("NotRegisteredMessage");
}
if (topic == null || topic.Length > Ddeml.MAX_STRING_SIZE)
{
throw new ArgumentNullException("topic");
}
if (item == null || item.Length > Ddeml.MAX_STRING_SIZE)
{
throw new ArgumentNullException("item");
}
// Assume the topic name and item name are wild.
IntPtr topicHandle = topic != "*" ? Ddeml.DdeCreateStringHandle(_InstanceId, topic, Ddeml.CP_WINANSI) : IntPtr.Zero;
IntPtr itemHandle = item != "*" ? Ddeml.DdeCreateStringHandle(_InstanceId, item, Ddeml.CP_WINANSI) : IntPtr.Zero;
// Check the result to see if the post failed.
if (!Ddeml.DdePostAdvise(_InstanceId, topicHandle, itemHandle))
{
int error = Ddeml.DdeGetLastError(_InstanceId);
var msg = Ddeml.DDEGetErrorMsg(error); if (msg != null)
{
}
}
Ddeml.DdeFreeStringHandle(_InstanceId, itemHandle);
Ddeml.DdeFreeStringHandle(_InstanceId, topicHandle);
}