Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Mode
ID_CA_TAG_VS_MODE
Parameter: Add View
ID_CA_TAG_VS_ADD_VIEW
Parameter: Add Hotspot
ID_CA_TAG_VS_ADD_HOTSPOT
Parameter: Remove
ID_CA_TAG_VS_REMOVE
Parameter: Image
ID_CA_TAG_VS_IMAGE_NAME
Parameter: Zoom
ID_CA_TAG_VS_ZOOM
Parameter: Left
ID_CA_TAG_VS_LEFT
Parameter: Top
ID_CA_TAG_VS_TOP
Parameter: Right
ID_CA_TAG_VS_RIGHT
Parameter: Bottom
ID_CA_TAG_VS_BOTTOM
Parameter: Color
ID_CA_TAG_VS_COL
Parameter: Transparency
ID_CA_TAG_VS_TRANS
Parameter: Highlight
ID_CA_TAG_VS_HIGHLIGHT_COL
Parameter: Transparency
ID_CA_TAG_VS_HIGHLIGHT_TRANS
Parameter: Selected
ID_CA_TAG_VS_SELECT_COL
Parameter: Transparency
ID_CA_TAG_VS_SELECT_TRANS
Parameter: Link
ID_CA_TAG_VS_LINK
Parameter: Action
ID_CA_TAG_VS_ACTION
Parameter: Command
ID_CA_TAG_VS_COMMAND
Parameter: Script
ID_CA_TAG_VS_PYTHON
Parameter: Views
ID_CA_TAG_VS_VIEW
Parameter: Brush
ID_CA_TAG_VS_BRUSH
Parameter: Lasso
ID_CA_TAG_VS_LASSO
Parameter: Shape
ID_CA_TAG_VS_SHAPE