Using ERRMSG and Keyboard Shift Attribute I

The short story is: I have a couple of fields that are Input/Output type in DDS with a keyboard shift attribute of I.  Can the ERRMSG keyword be used on the fields?  

The long version:  We want the users to select the value for two fields using a prompt window (data coming from a database).  The two fields have the Keyboard Shift Attribute set to I to block any input actions except Function keys.  When the user presses F4 the window pops up and they select the data for the field.  The problem is, how can I make sure that they know to use F4 and only F4?  Once on the screen, users try to enter text which causes the "Operator input error occurred" bell and red X to appear.  The display screen does not return control to the program to allow a proper error message to be shown.  Can the Keyboard Shift Attribute be used with ERRMSG?  

Thank you in advance for the solution or a different approach.  It is greatly appreciated.

JS
NeffRentalAsked:
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daveslaterConnect With a Mentor Commented:
Ok what I would do is have a single byte dummy field next to the Input field, have it as an auto record advance so if they put any character in it then use this to control prompt screen.
What I usually do for these list is allow the user to enter the value, validate it against the table and if it is invalid pop up the selection list, the user can still use f4 for the list.
You will find the during data entry users become familiar with the codes and will prefer to have the option to type a valid value or use F4 for a list.

Dave
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daveslaterCommented:
Hi
you need to use the CHKMSGID keyword. You can then set a message in a message file "Input not allowed - use F4 for a list"
CHKMSGID(MSG00000 MYMSGF)

Dave
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NeffRentalAuthor Commented:
I added the CHKMSGID and the error message in the file was not displayed.  My guess it is due to the field being Input inhibited.  What I am trying to do is have an input field that does not allow the user to key anything in.  They will only be allowed to use F4.
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NeffRentalAuthor Commented:
Dave,

I want to thank you for your response and assistance.  We couldn't get the app to work the way we wanted so we took a different route.  Again thanks for all your help.

JS
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