SUBROUTINE BOOLEAN_CONV(ConvType, DataIo, ReturnCode, ReturnedValue)
#pragma precomp SRP_PreCompiler

$insert logical

equ valid$         to 0    ;* successful
equ invalid_msg$   to 1    ;* bad data       -   print error message window
equ invalid_conv$  to 2    ;* bad conversion -          "         "
equ invalid_nomsg$ to 3    ;* bad but do not print the error message window

status() = Valid$

IF NOT(ASSIGNED(ReturnCode)) THEN ReturnCode = ''

begin case
   case ConvType = 'ICONV'
        ReturnedValue = DataIo
        
   case ConvType = 'OCONV'
   
        If DataIO EQ '1' then
            Desc    = 'Yes'
        end else
            Desc    = ''
        end            
            
   		ReturnedValue = Desc
   		
   		
   case otherwise$
        status() = invalid_msg$
end case
return