How Can I Connect To An Mdf File (Sql 2008) From App?

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MFC

in the name of allah
hi everyone

i work with Visual C++2013 and i want to connect to an .mdf file (2008).
i use below driver code but it makes error.
my server addres is : 8TH_SHINE

Driver={SQL Server};Server=8TH_SHINE\\SQLEXPRESS;AttachDbFilename=F:\Amlak.mdf;Database=Amlak;Trusted_Connection=Yes;Uid=;Pwd=;

the put the .log file too side of the .mdf file.at finally doesn't work.

but when i use this driver it works:

Driver={SQL Server};Server=8TH_SHINE\\SQLEXPRESS;Database=Amlak;Trusted_Connection=Yes;Uid=;Pwd=;

i want load the databse from the mdf file, not the default database in the windows directory.

can you tell me what do i have to do?

thanks alot