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# LogiView

## Keyword act_fld

| The keyword act_fld defines the access to the current (mask) field without the necessity to know its name. Act_fld represents a unique and complete Where clause; therefore, using further Where clauses is excluded. It only makes sense to use this keyword as an argument of the functions 'sel_string', 'sel_date', 'sel_value' or 'sel_logic', or for the Definition of the database access of a variable. This is prerequisite to uniquely specify the current field of a widget by means of the current line and the name of the current field.
| Act_fld can only be used if LogiView is called as "pre-field" or "post-field" or as a "hyper field" userexit. Note: act_fld corresponds to the current field.
| ### Example 1:
| Calling of a decision table as "Post-Field-Trigger" (Userexit 'lgv_post_fld') in order to read and verify user inputs in this field using the function 'sel_value':
T | Ln | Cond/Act | R 01 |
| ELSE
B | 10 | sel_value(act_fld) <= | DUR |
| --------------------- | ---- |
| ----
A | 20 | put("Input to low!") | yes |
| no
A | 30 | exit() | yes |
| no
| ### Example 2:
| Definition of the database access for the string variable S1 (in the Variable declaration table):
Name | T | ... | Database access | ..
S1 | S | ... | act_fld |