CAD tip # 12392:

The export process is controlled through the WriteData operation and through its parameters given as arguments of the "FLAT PATTERN DXF" or "FLAT PATTERN DWG" operations. A simple version of such iLogic or VBA macro looks e.g. like this (different parameter types are listed; must be invoked from the unfold environment):

Dim oDataIO As DataIO
Dim oPart As PartDocument
Dim sDXFname As String
Dim csOut As String
oPart = ThisApplication.ActiveDocument
oDataIO = oPart.ComponentDefinition.DataIO
sDXFname = oPart.FullFileName & ".DXF"
'csOut = "FLAT PATTERN DXF?TangentLayer=Tangents&SimplifySplines=True"
'csOut = "FLAT PATTERN DXF?AcadVersion=2000&BendUpLayer=IV_BEND&BendUpLayerLineType=37634&BendUpLayerColor=255;255;0&BendDownLayerLineType=37634"
csOut = "FLAT PATTERN DXF?AcadVersion=R12" _
        + "&OuterProfileLayer=IV_OUTER_PROFILE" _
        + "&InteriorProfilesLayer=IV_INTERIOR_PROFILES" _
        + "&InvisibleLayers=IV_TANGENT;IV_BEND;IV_BEND_DOWN;IV_TOOL_CENTER;IV_TOOL_CENTER_DOWN;IV_ARC_CENTERS;IV_FEATURE_PROFILES;IV_FEATURE_PROFILES_DOWN;IV_ALTREP_FRONT;IV_ALTREP_BACK;IV_UNCONSUMED_SKETCHES;IV_ROLL_TANGENT;IV_ROLL"
oDataIO.WriteDataToFile (csOut, sDXFname)

An overview of the individual parameters - all parameters of the type "*Layer" can have also additional parameters with the suffixes LineType, LineWeight, or Color (e.g. TangentLayerLineType, TangentLayerColor):

An overview of codes for the "...LineType" parameters at the individual layers (see the note in the previous table and see the examples above):

If you need to create the config string conveniently, through an interactive dialog, you can use the standalone FlatPatternConfigBuilder utility by CAD Studio: