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ui.Interface.setSize()

This method is used to change the window size for an MDI parent container. The method takes two arguments, window height and widow width, which can be both integers or strings:

CALL ui.Interface.SetSize(15, 60)

By default, the method arguments specify the size in character grid cells. However, you can specify the size in pixels by adding the px unit:

CALL ui.Interface.setSize("700px","700px")

This method is only supported by LyciaDesktop. Other clients will ignore any attempt to specify the window size of an MDI parent container .