isValid
isValid(): Boolean;
The isValid method of the Time primitive type returns true if the receiver contains a valid time value.
The code fragment in the following example shows the use of the isValid method.
if not any.Time.isValid() then app.msgBox("New value must contain a valid Time", "No date entered", MsgBox_OK_Only); return false; endif;
Use this method after a conversion instead of testing for a null value, as null indicates midnight, which is a valid time.