char *dal_mas_ret_chk_fld (idf)

Returns the check string of the field.

Input Parameters Significance
DtvLong idf field Id

Output Parameters Significance
no -

Return Code Significance
value check string
0 no check string set

If you set a check string for the field, DataView will check whether characters entered in the field fulfill the conditions set by the individual check characters at the current position in the field. Thus you can define conventions for field input.

The following check characters can be used:

Example:

To assure item numbers being entered in the format > R232.544 c < you would have to specify the check string > RNNN.NNN0a < .