The *%<parameter>%* tag defines function parameter names and types using the *name* and *type* attributes:

*name* - parameter name

*type* - *string*, *int*, *real* or *datetime*

Code to check the parameter count and types is generated automatically. Local C variables are created that take the parameter value and optional information. For a parameter named *foobar* the following variables are created:

*foobar* - takes the parameter value. Depending on the parameter type this is either a *double*, *long long*, *char** or *time_t*

*foobar_is_null* - for *int*, *real* and *datetime* this indicates whether a *NULL* value was passed (for *string* types *foobar* itself is a NULL pointer)

*foobar_len* - for *string* this contains the actual string length