MatrixObject.SubMatrix(RowStart, RowEnd, ColStart, ColEnd)
The RowEnd parameter can contain a smaller value than RowStart. In this case the returned matrix is flipped horizontally. The same way, if ColEnd is smaller than ColStart, then the returned matrix is flipped vertically.
Error 1319 will be returned, if any of RowStart, RowEnd parameters exceed matrix size.
Error 1320 will be returned, if any of ColStart, ColEnd parameters exceed matrix size.|