Places a visual marker on a particular day. Note that this function always returns TRUE, and you should ignore the return value. In GTK+ 3, this function will not return a value.
the day number to mark between 1 and 31.
TRUE, always
See Implementation
Places a visual marker on a particular day. Note that this function always returns TRUE, and you should ignore the return value. In GTK+ 3, this function will not return a value.