protected override bool DispatchMessage(object message, DispatchTarget target)
{
if (target == DispatchTarget.LocalProcess)
{
InvokeMessageHandlers(message);
return(true);
}
bool successfullyDispatched = false;
NativeMethods.EnumWindowsProc enumProc = null;
switch (target)
{
case DispatchTarget.FirstOtherProcess:
enumProc = delegate(IntPtr hWnd, IntPtr lParam) {
if (ShouldSendToWindow(hWnd))
{
bool wasHandled = SendMessage(hWnd, message);
if (wasHandled)
{
successfullyDispatched = true;
return(NativeMethods.StopWindowEnumeration);
}
}
return(NativeMethods.ContinueWindowEnumeration);
};
break;
case DispatchTarget.AllOtherProcesses:
successfullyDispatched = true;
enumProc = delegate(IntPtr hWnd, IntPtr lParam) {
if (ShouldSendToWindow(hWnd))
{
SendMessage(hWnd, message);
}
return(NativeMethods.ContinueWindowEnumeration);
};
break;
default:
throw new NotSupportedException();
}
NativeMethods.EnumWindows(enumProc, lParam: IntPtr.Zero);
return(successfullyDispatched);
}
/// <summary>
/// Tries to send all queued messages to the passed in target processes.
/// Query <see cref="HasUndispatchedMessages"/> to determine if all messages
/// could be been dispatched successfully.
/// </summary>
public void DispatchMessages(DispatchTarget target)
{
while (HasUndispatchedMessages)
{
bool dispatchedSuccessfully = DispatchMessage(MessageQueue.Peek(), target);
if (dispatchedSuccessfully)
{
MessageQueue.Dequeue();
}
else
{
break;
}
}
}
protected abstract bool DispatchMessage(object message, DispatchTarget target);
