MDI – During Runtime (Magic xpa 4.x)
When an MDI project loads, it loads the Magic xpa MDI container with the menus and toolbars defined. 
When a program is executed concurrently, if the Window Type property is set to Child, the new program will be opened in a new context but in the same MDI container as the calling program.
If a program is executed, and its Window Type is not defined as Floating or SDI, the program will share the same MDI container.
If a new window is opened in a different context, the window opens on top of the window in focus.
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 When a Modal window calls a concurrent task running in the same MDI container, focus will not pass to that task until the Modal window is closed. 
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Window Focus