CS_VER_STRING defines a character string that represents the actual version of Client-Library that an application is using. This property may only be retrieved.
CS_VER_STRING and CS_VERSION indicate different version levels because later versions of Client-Library emulate the behavior of earlier versions.
CS_VER_STRING represents the actual version of Client-Library that is in use. CS_VERSION represents the version of Client-Library behavior that an application has requested with ct_init.
