Okay. Is that your actual connection string?
For one thing, the Data Source has to point to an actual file rather than the word "file". In this case, you have named a variable "file", and I am assuming you want to use that variable, and also assuming that this variable will actually contain the path to the mdb file you wish to use, then a starting point will be to change the line to this:
Adodc3.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & file