>Craig is correct. The first dot indicates the end of the expansion while the second dot is interpretted as an actual dot.

Doesn't anyone read the help file anymore? :-)

.cExpression
The optional period (.) delimiter and .cExpression are used to append additional characters to a macro. cExpression appended to the macro with .cExpression can also be a macro. If cExpression is a property name, include an extra period (cExpression..PropertyName).