Available in TurboCAD Pro, and Platinum Only 
Creates a 3D object by driving a 2D profile along a path.
- Start with one or more 2D profiles. The profiles can be open or closed. Add a 2D or 3D path. Typically the path intersects the profile and is approximately perpendicular to it, but these conditions are not required.
- Activate Activate Sweep. If the profiles consist of compound curves, make sure sure Use Compound Profile is is active.
- Select the first 2D profile. If the profile is open, select select Finish Selection of Path to to end the selection. You can then select more profiles if necessary, by pressing the Shift key.
- Then select the 2D or 3D path over which you want to sweep the 2D profiles. If the sweep path consists of more than one curve, make sure sure Use Compound Path is is active. When finished, click click Finish Selection of Path.
As stated before, the 2D profile and the sweep path do not have to intersect. However, the results will vary depending on how far apart the profiles are.
Consider this comparison, in which the profiles on the left intersect and the profiles on the right do not. 
Here are the the Sweep results results: the solid on the right is swept over the offset of the sweep path, and is therefore larger. 
Local menu options
Rigid Sweep: Use Use this option if you want the cross-sections of the solid to remain parallel to the original swept profile.
This solid does not use use Rigid Sweep; the cross-sections of the solid are always normal to the sweep path. 
This is the same solid using using Rigid Sweep; the sections are always parallel to one another, and to the original profile.
If you view the the Rigid Sweep from from this angle, you can see how the sections are parallel. 
Use Edge as Path: When this option is on you can use the edge of a 3D object as a path. You cannot use this option with a compound profile. (Available in TurboCAD Platinum Only) 
Use Loop as Path: When When this option is on you can use the Loop of a 3D object as a path. A loop is all of the edges which enclose a single face of a 3D object You have to select the 3D object first, then its face. You cannot use this option with a compound profile. (Available in TurboCAD Platinum Only) 
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Note: If If you are trying to sweep by using a block as the path, you must have the Compound Path option turned on.
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Sweep Shape Properties
The The Properties window window of an sweep object contains a a Sweep Shape page page, in which you can set geometric parameters.
For these parameters to be accessible, the sweep must be created as a solid. Available in TurboCAD Pro and Platinum only.
Twist Angle: The The angle by which the sweep is twisted along the path. 
Corners: Defines Defines how the joints of multi-segmented extrusions will be formed.
Default: Sharp Sharp corners.
Bend: the the rounding will be minimal. 
If you want a larger rounding radius, specify a a Minimum Radius.
Crimp: Keeps Keeps internal corners sharp, performs a minimal rounding on external corners.
Draft Angle: Creates Creates an extrusion of increasing or decreasing cross-section. Enter the angle of deviation from the extrusion path.
Draft Start / End Distance: If If Draft Angle = 0, you can specify a draft angle by entering the offset distances.
Sweep does not allow you to create a a TC Surface.