User`s guide

Utility Library Classes

D-19

• All indices and field name.

This format accesses an array element of an multidimensional array by

specifying

n indices. These statements access all four of the elements of the

array in the previous example:

For I From 1 To 2

For J From 1 To 2

r(I, J) = x(I, J, "red")

g(I, J) = x(I, J, "green")

b(I, J) = x(I, J, "blue")

• Array of indices and field name.

This format accesses an array element by passing an array of indices and a

field name. The next example rewrites the previous example using an index

array:

Dim Index(1 To 2) As Integer

For I From 1 To 2

Index(1) = I

For J From 1 To 2

Index(2) = J

r(I, J) = x(Index, "red")

g(I, J) = x(Index, "green")

b(I, J) = x(Index, "blue")

With these four formats, the Item property provides a very flexible indexing

mechanism for structure arrays. Also note:

• You can combine the last two indexing formats. Several index arguments

supplied in either scalar or array format are concatenated to form one index

set. The combining stops when the number of dimensions has been reached.

For example:

Dim Index1(1 To 2) As Integer

Dim Index2(1 To 2) As Integer