So for the past day or so I have been fixing a bug that is caused by a modal dialog. I work on an application which communicates with the server through the Windows message pump. When I use ShowDialog() to show a modal form, the message pump is blocked and none of my messages are processed, yet they do build up in the queue (expected behavior).

However, I recently noticed that if a modal form is opened through a menu item's click event, the messages are pumped to the main form and processed. Does anyone know why these messages are not blocked when a modal form is shown through a menu item's click event?