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Create MDI frame - %fr

%fr is used in a parent window to define a frame into which child windows are placed. These windows can be moved and re-sized within this MDI (multi-document interface) frame. The format takes two integer arguments that define the width and height of the frame in pixels. A MDI frame can be preceded by the pivot (%pv), in which case it will expand as the window expands. An example using %fr appears with %aw below.

A grave accent (`) can be added to %fr to cause it to maintain a handle identifying the currently selected child window. An extra integer argument is supplied to hold the returned handle. The integer will be zero if there is no child window. When a child window is created, the handle is obtained by using %hw (see Window handle - %hw). A comparison may then be made between the handle updated by %fr and those previously returned by %hw.



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