num-var = IS_xxxx(line-ptr)


Operands:

line-ptr

the line pointer of the line which is to be tested.


Returns:


Returns TRUE if the line at line-ptr is the indicated type, or FALSE if it is not or if the line-ptr is invalid.


The IS_xxxx function exists in the following forms:


Is_Bnds(line-ptr)

a =BNDS> line

Is_Bottom(line-ptr)

the Bottom of Data line

Is_Cols(line-ptr)

a =COLS> line

Is_Data(line-ptr)

a normal text data line

Is_File(line-ptr)

a =FILE> line

Is_Mark(line-ptr)

a =MARK> line

Is_Mask(line-ptr)

a =MASK> line

Is_Note(line-ptr)

a =NOTE> line

Is_Prof(line-ptr)

a =PROF> line

Is_Tabs(line-ptr)

a =TABS> line

Is_Top(line-ptr)

the Top of Data line

Is_ULine(line-ptr)

a User line

Is_XLine(line-ptr)

an excluded line

(usually, but not always, a data line)

Is_XMarker(line-ptr)

an excluded line marker

(the dashed "placeholder" line)

Is_Word(line-ptr)

a =WORD> line


RC will always be 0 and Msg$ will be "" (Null)