Dim Value As Integer
An Integer is a signed 16 bit data type. It can store integer numbers in the range of -32,768 to 32,767 and attempting to store a value outside of that range will result in runtime error 6: Overflow.
Note that in general, it is better practice to use a Long rather than an Integer unless the smaller type is a member of a Type or is required (either by an API calling convention or some other reason) to be 2 bytes. In most cases VBA treats Integers as 32 bit internally, so there is usually no advantage to using the smaller type. Additionally, there is a performance penalty incurred every time an Integer type is used as it is silently cast as a Long.
The casting function to convert to an Integer is
CInt(). For casts from floating point types, the result is rounded to the nearest integer value with .5 rounding up.