The VkMsgWindow class is a subclass of VkWindow that works with VkMsgApp to support the ObjectPak interprocess message facility. Use VkMsgWindow for your application's windows instead of VkWindow or VkSimpleWindow if you want ToolTalk support for your application.
The VkMsgWindow constructor creates an instance of VkMsgClient that you can use to manage messages in that window. Access the window's VkMsgClient object with the VkMsgWindow::messageClient() function:
VkMsgWindow also provides a variety of convenience functions for directly manipulating a window's VkMsgClient object. Consult the VkMsgWindow(3) reference page for more information on these functions.