Copying Data From Selected Workbook To Another

i have tried making a simple macro that just copies all of the available data from a workbook and pastes it in another. I have looked at information available on the internet and combining data from multiple sources I have reached the following code that does not do what I want:

Code:
Option Explicit
Sub GatherData()
Dim wbCSV As Workbook
Dim wsMstr As Worksheet
Dim FileToOpen As String
Dim fPath As String
Dim fCSV As String

[code]....

I have tried a search on the forums but I could not find anything that I could apply with my limited understanding.