Macromedia dreamweaver 8-extending dreamweaver User Manual

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C-Level Extensibility
Data types
The JavaScript interpreter defines the following data types.
typedef struct JSContext JSContext
A pointer to this opaque data type passes to the C-level function. Some functions in the API 
accept this pointer as one of their arguments.
typedef struct JSObject JSObject
A pointer to this opaque data type passes to the C-level function. This data type represents an 
object, which might be an array object or some other object type. 
typedef struct jsval jsval
An opaque data structure that can contain an integer, or a pointer to a float, string, or object. 
Some functions in the API can read the values of function arguments by reading the contents 
of a 
jsval
 structure, and some can be used to write the function’s return value by writing a 
jsval
 structure.
typedef enum { JS_FALSE = 0, JS_TRUE = 1 } 
JSBool
A simple data type that stores a Boolean value.