%ss is used before %rd - Edit Integer, %rf - Edit Floating Point, or %rs - Edit String in order to automatically save and restore
data in these controls.
filename/section is a standard character string (can be replaced by @).
filename is the stem of a file with the .INI extension that is stored in
the standard Windows directory.
section is the name of a section in the INI file. This name appears in
square brackets at the head of a section in the file.
The item name for the data is automatically formed from the text that appears
immediately before the control. Spaces are removed from the text in order to
form the name. See
Save settings to .INI file for further details.
ctrl is set to 1 to enable saving and to 0 to disable saving.