Create MDI frame - %fr

In this section:

• Caption - %ca[title]
• Window handle - %hw
• Control handle - %lc
• Leave window open - %lw[option]
• Start-up call-back - %sc
• Child window - %ch
• Control variable - %cv
• Create MDI frame - %fr
• Attach window - %aw
• Drag and drop - %dr
• Set window position - %sp
• Set window size - %sz
• Window style - %ww[options]
• Background colour - %bg[colour]
• ClearWin window - %N.Mcw[options]
• Property sheet - %Nps
• Property sheet child - %sh
• Closure control format - %cc
• Delayed auto recall - %dl
• Wallpaper - %wp[bitmap]
• User window - %uw[class_name]
• Screen saver - %sv
• Disable screen saver - %ns
• Taskbar icon - %ti

%fr (MDI Frame) 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 (Pivot)), in which case it will expand as the window expands. There is an example using %fr appears with %aw.

A grave accent (`) can be added to %fr (MDI Frame) to cause it to maintain a handle identifying the currently selected child window. An extra integer (kind=7) 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.