This command turns on or off the requirement for the Ctrl key be held down to manipulate objects in the 3D Scene view when you are using Alt-to-select mode. By default, the requirement to use the Ctrl key to manipulate is set to off, but if required, you can turn it on to avoid accidental manipulation.
When you are not in Alt-to-select mode, this command has no effect.
setControlToManipulate is the equivalent of selecting or clearing the CTRL key required to manipulate in 3D view when using ALT to select option in the Preferences dialog box (Interface tab).
See above syntax.
// Set the Ctrl key to be required to manipulate objects
// in the 3D Scene view when using Alt to select