Parameter Attributes

The following attributes apply to parameters of a method in a class or interface.

Attribute	Description
custom	Lets you define your own attribute.
defaultvalue	Allows specification of a default value for a typed optional parameter.
first_is	Specifies the index of the first array element to be transmitted.
iid_is	Specifies the index of the first array element to be transmitted.
immediatebind	Indicates that the database will be notified immediately of all changes to a property of a data-bound object.
in	Indicates that a parameter is to be passed from the calling procedure to the called procedure.
last_is	Specifies the index of the last array element to be transmitted.
lcid	Lets you pass a locale identifier to a function.
length_is	Specifies the number of array elements to be transmitted.
max_is	Designates the maximum value for a valid array index.
optional	Specifies an optional parameter for a member function.
out	Identifies pointer parameters that are returned from the called procedure to the calling procedure (from the server to the client).
range	Specifies a range of allowable values for arguments or fields whose values are set at run time.
ref	Identifies a reference pointer.
retval	Designates the parameter that receives the return value of the member.
satype	Specifies the data type of the `SAFEARRAY` structure.
size_is	Specifies the size of memory allocated for sized pointers, sized pointers to sized pointers, and single- or multidimensional arrays.
unique	Specifies a unique pointer.

See also