Closure control format - %cc

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

Sometimes, especially when an edit box is displayed, it is desirable to control the closure of a window. %cc (Control Closure) takes a call-back function as its argument. This function is called before the window closes (for whatever reason). If it returns a positive value the window is not closed. If a grave is used (%`cc) then the associated call-back function is called after the window is closed. A single window could use both %cc and %`cc.