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version 6.0
DR Calculate area (area; scope) 
Real
| Parameter | Type | Description | |
| area | Longint | | 4D Draw area |
| scope | Longint | | -1 = All, 0 = Selected, >0 = Object ID |
| Function result | Real |  | Surface area |
Description
The command DR Calculate area returns the surface area for the objects in area described by scope.
• If scope equals -1, DR Calculate area returns the surface area of all objects in the document.
• If scope equals 0, DR Calculate area returns the surface area of the selected objects.
• If scope is greater than 0, it must be equal to a specific object's ID; DR Calculate area returns the surface area of the object.
If the object does not exist, DR Calculate area returns -3, and DR Error returns error code 2.
Example
The following example calculates the surface area of all objects in area.
$SurfArea := DR Calculate area (Area;-1)
See Also
DR Calculate perimeter, DR Get ID.
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