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Returns the name of the MDI frame for an MDI child window, or null if the specified window is not an MDI frame or child. Use with Get_Property() only.
Usage
mdiframe = Get_Property (windowID, "MDIFRAME")
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Suppose you write code for the Click event of a button and you need a reference to a window's MDI Frame, if it exists. The code below will get that reference. If the MDI frame does not exist, the variable Parent will return @window instead of the MDI frame reference.
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