READVAR()

Return variable name of current GET or MENU

Syntax

READVAR( [<cVarName>] ) --> cOldVarName

Arguments

<cVarName> is a new variable name to set.

Returns

READVAR() return the old variable name. If no variable previously was set, READVAR() return "".

Description

READVAR() is set inside a READ or MENU TO command to hold the uppercase name of the GET / MENU TO variable, and re-set back to old value when those commands finished. You should not normally set a variable name but rather use it to retrieve the name of a GET variable when executing a VALID or WHEN clause, or during SET KEY execution and you are inside a READ or MENU TO.

      // display a menu, press F1 to view the MENU TO variable name
      CLS
      @ 1, 10 PROMPT "blood sucking insect that infect beds   "
      @ 2, 10 PROMPT "germ; virus infection                   "
      @ 3, 10 PROMPT "defect; snag; (source of) malfunctioning"
      @ 4, 10 PROMPT "small hidden microphone                 "
      @ 6, 10 SAY "(Press F1 for a hint)"
      SET KEY 28 TO ShowVar
      MENU TO What_Is_Bug

      PROCEDURE ShowVar
      ALERT( READVAR() )        // WHAT_IS_BUG in red ALERT() box

Status

Ready

Compliance

READVAR() works exactly like CA-Clipper's READKEY(), note however, that the <cVarName> parameter is not documented and used internally by CA-Clipper.

Platforms

All

Files

Library is rtl

See Also

• @...GET
• @...PROMPT
• MENU TO
• READ
• SET KEY
• __AtPrompt()
• __MenuTo()