ComboBox1.DisplayMember = "Name"
   ComboBox1.ValueMember = "FullName"
   ComboBox1.DataSource = New DirectoryInfo("C:\Samples").GetDirectories("*")

'In case one is using .NET 2.0 + than he can use overloaded method of 
' GetDirectories(searchPattern, SearchOption) to include/Exclude Sub directory as per onces need.