Declare Time - 'Conversion From Type 'Timespan' To Type 'integer' Is Not Valid'

I declare my dates as the following in my code:

Dim DeliveryDate as Date

But i am now trying to declare time however i keep getting an error because i cannot get the type correct. I tried the following but get the following error: "Conversion from type 'Timespan' to type 'integer' is not valid".

Dim DeliveryTime as DateTime
Dim DeliveryTime as Integer

In my database the DeliveryTime type is set to Time(7) so i would assume there should be 'Time' which i could use to declare it, but there isnt. What is the correct type i should be using?

Here is my exact code. There error is Input string was not in correct format:

GraphDate4 = String.Empty
DeliveryProducts = "{ name: 'DeliveryProducts', data: ["
If DataReader4.HasRows Then

[Code].....