Two pre-defined functions in visual basic?

A string is a line of text.

For example:

Dim example As String = "whatever text you want"

Would make a string that says "whatever text you want"

Later, you can use this for a msgbox or textbox

Example:

TextBox1.Text = example '(that is the string we made)

or

MsgBox(example, MsgBoxStyle.Information, "Note!") '(would display a msgbox containing the text in the string)