When a single command string is provided, returns True or False to indicate whether a button running the specified command would appear checked (highlighted) or not.

Example:

if (IsChecked("Set FLATVIEW=mixed")) { ... } // Is FlatView - Mixed mode currently on?

If two or more commands are provided, returns 0 if no commands are checked, otherwise returns the index of the first checked command.

Example:

flatViewMode = IsChecked("Set FLATVIEW=Grouped", "Set FLATVIEW=Mixed", "Set FLATVIEW=MixedNoFolders");
// flatViewMode will equal 0, 1, 2 or 3 depending on the current FlatView mode

See also: IsEnabled