| siRegionStartFrame |
[0] If a region has been selected this returns the start frame. If no region has been selected then 0.0 is returned. |
| siRegionEndFrame |
[1] End frame of the region selection, or 0.0 if no region has been selected. |
| siRegionMin |
[2] Minimum value of the keys in the region, or 0.0 if no region has been selected. |
| siRegionMax |
[3] Maximum value of the keys in the region, or 0.0 if no region has been selected. |