DtvLong dal_fld_rea_log (idf, row, log)

reads the boolean value at the specified row position in the field.

Input Parameters Significance
DtvLong idf field Id
DtvLong row row position in the field

Output Parameters Significance
DtvLong *log boolean value

Return Code Significance
0 no error
-1 field Id is NULL
1 wrong row position
3 wrong field type
4 field contents is no logical value

You can only apply the function to fields of the types boolean, string, and calculate.

The logical value is > 0 < when switched to > OFF < and other than > 0 < when switched to > ON < .