Microsoft® Visual Basic® Scripting Edition Imp Operator 
Language Reference Version 1

Used to perform a logical implication on two expressions.
result = expression1 Imp expression2The Imp operator syntax has these parts:
Part Description result Any numeric variable. expression1 Any expression. expression2 Any expression.
The following table illustrates how result is determined:
The Imp operator performs a bitwise comparison of identically positioned bits in two numeric expressions and sets the corresponding bit in result according to the following table:
If expression1 is And expression2 is Then result is True True True True False False True Null Null False True True False False True False Null True Null True True Null False Null Null Null Null
If bit in expression1 is And bit in expression2 is Then result is 0 0 1 0 1 1 1 0 0 1 1 1