AcDbTable::setTextString

virtual Acad::ErrorStatus setTextString(
    int row, 
    int col, 
    const ACHAR* text
);

This function makes a copy of text and uses the copy as the text string in the specified cell.

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

Parameters	Description
row	Input integer specifying the zero-based row index for the cell
col	Input integer specifying the zero-based column index for the cell
text	Input null-terminated text string