It returns the dimensions of the source Matrix used by the constructor
matrix(MatrixObject &mo, BOOL bWriteback = FALSE)
if bWriteback is TRUE.
See that constructor and the accompanying example for more details.
bool GetSourceDim( int & nRows, int & nCols )
TRUE if bWriteback was TRUE when calling the constructor, otherwise FALSE.
// Have a matrix with the name "MBook1" in the project, with some values.
MatrixObject mo("MBook1", 0);
matrix m(mo, TRUE);
int nRows, nCols;
if (m.GetSourceDim(nRows, nCols))
printf("rows = %d\tcols=%d\n", nRows, nCols);