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_Create |
  
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_Create |
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_create
The optional _create function has following properties:
| 1. | is automatically called once the variable is defined |
| 2. | it should never be called explicitly |
| 3. | it can take parameters, which can be used for initialization |
For our case of Point2D it allows us to set x and y during the variable creation.
TYPE Point2D
x AS SINGLE
y AS SINGLE
FUNCTION _create(x AS SINGLE, y AS SINGLE)
ME.x = x
ME.y = y
END FUNCTION
END TYPE
DIM point AS Point2D(1, 2)
Now x contains 1 and y is equal to 2.
As you can see, the _create function is not explicitely called, but any parameters passed to your UDT upon creation are passed to _create automatically.
Without _create, you would need to initialize the variable the hard way:
DIM point AS Point2D
point.x = 1
point.y = 2