Converts the top left corner of the reference to a string address
CStringA TopLeftToStringA( BOOL bA1 = FALSE, BOOL bLocalLanguage = FALSE ) const;
TRUE to have the address in A1 format; FALSE for R1C1 format.
TRUE to have the address in the local language; FALSE for English. This setting as no impact on A1-style addresses. R1C1 format addresses use different letters in different languages: thus the English address "R1C2" is written as "Z1S2" in German, if bLocalLanguage is TRUE.
A string containing the address of the top left cell of the range.