AcDbTable::insertRows

virtual Acad::ErrorStatus insertRows(
    int row, 
    double height, 
    int nRows = 1
);

This function inserts one or more rows at the specified index.

Returns Acad::eOk if successful. Otherwise, returns Acad::eInvalidInput .

Parameters	Description
nIndex	Input index at which to insert the new rows
nNumRows	Input number of rows to insert
nInheritFrom	Input index of the row to inherit the format for the new rows. It can be -1. If it is -1 new rows don't inherit any format and they use default format.