+ /**
+ Reads a float value, returning @true if the value was found.
+
+ If the value was not found, @a defaultVal is used instead.
+
+ Notice that the value is read as a double but must be in a valid range
+ for floats for the function to return @true.
+
+ @since 2.9.1
+
+ @beginWxPerlOnly
+ Not supported by wxPerl.
+ @endWxPerlOnly
+ */