# Operator_SubtractRight

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Method

Used to overload the - operator, providing custom functionality. **Operator_SubtractRight** is the same as Operator_Subtract but the implicit Self instance is on the right instead of the left in the subtraction.

## Notes

Create an **Operator_SubtractRight** function in a class to specify the functionality of the + operator for that class.

The ordinary (left) methods are always preferred; the Right version is used only if there is no legal left version.

## Sample Code

Suppose you have a class, Vector, that can store a vector. To define the - operator for this class, create a method of the Vector class called **Operator_SubtractRight**.

The Vector class has two integer properties, x and y.

**Operator_SubtractRight** is defined as:

Function Operator_SubtractRight(lhs As Vector) As Vector

// lhs stands for left-hand-side, the vector to be added to Self

Dim ret As New Vector // the difference between the two vectors

ret.x = lhs.x + Self.x

ret.y = lhs.y + Self.y

Return ret

End Function

// lhs stands for left-hand-side, the vector to be added to Self

Dim ret As New Vector // the difference between the two vectors

ret.x = lhs.x + Self.x

ret.y = lhs.y + Self.y

Return ret

End Function

## See Also

- operator, Operator_Subtract function.