C# Definition:

[Flags]    
public enum ClassStyles : uint
{
    CS_VREDRAW         = 0x0001,
    CS_HREDRAW         = 0x0002,
    CS_DBLCLKS         = 0x0008,
    CS_OWNDC           = 0x0020,
    CS_CLASSDC         = 0x0040,
    CS_PARENTDC        = 0x0080,
    CS_NOCLOSE         = 0x0200,
    CS_SAVEBITS        = 0x0800,
    CS_BYTEALIGNCLIENT = 0x1000,
    CS_BYTEALIGNWINDOW = 0x2000,
    CS_GLOBALCLASS     = 0x4000,
    CS_IME             = 0x00010000,
    CS_DROPSHADOW      = 0x00020000
}

VB.NET Definition:

<Flags()> Public Enum ClassStyles As UInteger
    CS_VREDRAW         = &H1
    CS_HREDRAW         = &H2
    CS_DBLCLKS         = &H8
    CS_OWNDC           = &H20
    CS_CLASSDC         = &H40
    CS_PARENTDC        = &H80
    CS_NOCLOSE         = &H200
    CS_SAVEBITS        = &H800
    CS_BYTEALIGNCLIENT = &H1000
    CS_BYTEALIGNWINDOW = &H2000
    CS_GLOBALCLASS     = &H4000
    CS_IME             = &H10000
    CS_DROPSHADOW      = &H20000
End Enum

Notes:

None.