+ <EM>Name</EM> <EM>Description</EM>
+ ---------------------------------------------------------------------
+ REQ_BEG_FIELD Move to the beginning of the field.
+ REQ_BEG_LINE Move to the beginning of the line.
+ REQ_CLR_EOF Clear to end of field from cursor.
+ REQ_CLR_EOL Clear to end of line from cursor.
+ REQ_CLR_FIELD Clear the entire field.
+ REQ_DEL_CHAR Delete character at the cursor.
+ REQ_DEL_LINE Delete line at the cursor.
+ REQ_DEL_PREV Delete character before the cursor.
+ REQ_DEL_WORD Delete blank-delimited word at the cursor.
+ REQ_DOWN_CHAR Move down in the field.
+ REQ_DOWN_FIELD Move down to a field.
+ REQ_END_FIELD Move to the end of the field.
+ REQ_END_LINE Move to the end of the line.
+ REQ_FIRST_FIELD Move to the first field.
+ REQ_FIRST_PAGE Move to the first page.
+ REQ_INS_CHAR Insert a blank at the cursor.
+ REQ_INS_LINE Insert a blank line at the cursor.
+ REQ_INS_MODE Enter insert mode.
+ REQ_LAST_FIELD Move to the last field.
+ REQ_LAST_PAGE Move to the last field.
+ REQ_LEFT_CHAR Move left in the field.
+ REQ_LEFT_FIELD Move left to a field.
+ REQ_NEW_LINE Insert or overlay a new line.
+ REQ_NEXT_CHAR Move to the next char.
+ REQ_NEXT_CHOICE Display next field choice.
+
+ REQ_NEXT_FIELD Move to the next field.
+ REQ_NEXT_LINE Move to the next line.
+ REQ_NEXT_PAGE Move to the next page.
+ REQ_NEXT_PAGE Move to the next page.
+ REQ_NEXT_WORD Move to the next word.
+ REQ_OVL_MODE Enter overlay mode.
+ REQ_PREV_CHAR Move to the previous char.
+ REQ_PREV_CHOICE Display previous field choice.
+ REQ_PREV_FIELD Move to the previous field.
+ REQ_PREV_LINE Move to the previous line.
+ REQ_PREV_PAGE Move to the previous page.
+ REQ_PREV_WORD Move to the previous word.
+ REQ_RIGHT_CHAR Move right in the field.
+ REQ_RIGHT_FIELD Move right to a field.
+ REQ_SCR_BCHAR Scroll the field backward a character.
+ REQ_SCR_BHPAGE Scroll the field backward half a page.
+ REQ_SCR_BLINE Scroll the field backward a line.
+ REQ_SCR_BPAGE Scroll the field backward a page.
+ REQ_SCR_FCHAR Scroll the field forward a character.
+ REQ_SCR_FHPAGE Scroll the field forward half a page.
+ REQ_SCR_FLINE Scroll the field forward a line.
+ REQ_SCR_FPAGE Scroll the field forward a page.
+ REQ_SCR_HBHALF Horizontal scroll the field backward half a line.
+ REQ_SCR_HBLINE Horizontal scroll the field backward a line.
+ REQ_SCR_HFHALF Horizontal scroll the field forward half a line.
+ REQ_SCR_HFLINE Horizontal scroll the field forward a line.
+ REQ_SFIRST_FIELD Move to the sorted first field.
+ REQ_SLAST_FIELD Move to the sorted last field.
+ REQ_SNEXT_FIELD Move to the sorted next field.
+ REQ_SPREV_FIELD Move to the sorted previous field.
+ REQ_UP_CHAR Move up in the field.
+ REQ_UP_FIELD Move up to a field.
+ REQ_VALIDATION Validate field.
+
+ If the second argument is a printable character, the driver places it
+ in the current position in the current field. If it is one of the
+ forms requests listed above, that request is executed.
+
+
+</PRE><H3><a name="h3-Field-validation">Field validation</a></H3><PRE>
+ The form library makes updates to the window associated with form
+ fields rather than directly to the field buffers.
+
+ The form driver provides low-level control over updates to the form
+ fields. The form driver also provides for validating modified fields
+ to ensure that the contents meet whatever constraints an application
+ may attach using <STRONG>set_field_type</STRONG>.
+
+ You can validate a field without making any changes to it using
+ <STRONG>REQ_VALIDATION</STRONG>. The form driver also validates a field in these cases:
+
+ <STRONG>o</STRONG> a call to <STRONG>set_current_field</STRONG> attempts to move to a different field.
+
+ <STRONG>o</STRONG> a call to <STRONG>set_current_page</STRONG> attempts to move to a different page of
+ the form.
+
+ <STRONG>o</STRONG> a request attempts to move to a different field.
+
+ <STRONG>o</STRONG> a request attempts to move to a different page of the form.
+
+ In each case, the move fails if the field is invalid.
+
+ If the modified field is valid, the form driver copies the modified
+ data from the window associated with the field to the field buffer.
+
+
+</PRE><H3><a name="h3-Mouse-handling">Mouse handling</a></H3><PRE>
+ If the second argument is the KEY_MOUSE special key, the associated
+ mouse event is translated into one of the above pre-defined requests.
+ Currently only clicks in the user window (e.g., inside the form display
+ area or the decoration window) are handled.