Introduction MTB Statements File System Compiler Applications Reference Guide Index

Language Structure Data Division I/O Format Division Procedure Division Mnemonics

(Invoke HELP)

Mnemonic: (Invoke HELP)
Hex equivalent: "@0E01@"
Discussion: This mnemonic is used in conjunction with the NOVA system (i.e., the Comet Help System).

The (Invoke HELP) mnemonic sets a flag within Comet. At the next INPUT statement in the program, this flag is examined; if the flag is on, Comet reads the #NOVA control file and takes the action specified in the "automatic help" record.

The result is a "pop-up" help feature, where a help action will occur automatically at a given INPUT prompt without the operator pressing one of the NOVA function keys.

The (Invoke HELP) control remains in effect only for the following INPUT statement (i.e., the auto help flag is turned off when automatic help is invoked). To use this feature repeatedly, you must use the (Invoke HELP) mnemonic repeatedly.

Example: 
PRINT (0) (Invoke HELP)   ! Set the automatic help flag
.
INPUT (0) WHATEVER$       ! Perform the automatic help action
                          ! as specified in the #NOVA control
                          ! file, then return to this INPUT
                          ! statement