C# Definition:

    [StructLayout(LayoutKind.Sequential)]
    struct INITCOMMONCONTROLSEX
    {
        public int dwSize;
        public uint dwICC;
    }

C# Definition:

    [StructLayout(LayoutKind.Sequential)]
    public struct INITCOMMONCONTROLSEX
    {
        private int dwSize;
        public uint dwICC;
    public struct INITCOMMONCONTROLSEX
    {
        private int dwSize;
        public uint dwICC;

        public INITCOMMONCONTROLSEX()
        {
            dwSize = Marshal.SizeOf(typeof(INITCOMMONCONTROLSEX));
            dwICC = 0;
        }
        public INITCOMMONCONTROLSEX()
        {
        dwSize = Marshal.SizeOf(typeof(INITCOMMONCONTROLSEX));
        dwICC = 0;
        }

        public INITCOMMONCONTROLSEX(uint dwICC)
            : this()
        {
            this.dwICC = dwICC;
        }
        public INITCOMMONCONTROLSEX(uint dwICC)
        : this()
        {
        this.dwICC = dwICC;
        }

        public INITCOMMONCONTROLSEX(CommonControls ICC)
            : this((uint)ICC)
        { }
        public INITCOMMONCONTROLSEX(CommonControls ICC)
        : this((uint)ICC)
        { }

        public CommonControls ICC
        {
            get { return (CommonControls)dwICC; } set { dwICC = (uint)value; }
        }
    }
        public CommonControls ICC { get { return (CommonControls)dwICC; } set { dwICC = (uint)value; } }
    }

VB Definition:

    <StructLayout(LayoutKind.Sequential)> _
    Public Structure INITCOMMONCONTROLSEX
        Public dwSize As Integer
        Public dwICC As System.UInt32
    End Structure

Public Structure INITCOMMONCONTROLSEX
    Private dwSize As Integer
    Public dwICC As UInteger

VB Definition:

    <StructLayout(LayoutKind.Sequential)> _
    Public Structure INITCOMMONCONTROLSEX
        Private dwSize As Integer
        Public dwICC As UInteger
    Public Sub New()
        dwSize = Marshal.SizeOf(GetType(INITCOMMONCONTROLSEX))
        dwICC = 0
    End Sub

        Public Sub New()
            dwSize = Marshal.SizeOf(GetType(INITCOMMONCONTROLSEX))
            dwICC = 0
        End Sub
    Public Sub New(dwICC As UInteger)
        Me.New()
        Me.dwICC = dwICC
    End Sub

        Public Sub New(dwICC As UInteger)
            Me.New()
            Me.dwICC = dwICC
        End Sub
    Public Sub New(ICC As CommonControls)
        Me.New(CUInt(ICC))
    End Sub

        Public Sub New(ICC As CommonControls)
            Me.New(CUInt(ICC))
        End Sub
    Public Property ICC() As CommonControls
        Get
            Return DirectCast(dwICC, CommonControls)
        End Get
        Set
            dwICC = CUInt(value)
        End Set
    End Property
End Structure

        Public Property ICC() As CommonControls
            Get
                Return DirectCast(dwICC, CommonControls)
            End Get
            Set
                dwICC = CUInt(value)
            End Set
        End Property
    End Structure

User-Defined Field Types (C#):

User-Defined Field Types https://www.pinvoke.net/emoticons/coffee.gif:

    public enum CommonControls : uint
    {
     ICC_LISTVIEW_CLASSES   = 0x00000001, // listview, header
     ICC_TREEVIEW_CLASSES   = 0x00000002, // treeview, tooltips
     ICC_BAR_CLASSES    = 0x00000004, // toolbar, statusbar, trackbar, tooltips
     ICC_TAB_CLASSES    = 0x00000008, // tab, tooltips
     ICC_UPDOWN_CLASS       = 0x00000010, // updown
     ICC_PROGRESS_CLASS     = 0x00000020, // progress
     ICC_HOTKEY_CLASS       = 0x00000040, // hotkey
     ICC_ANIMATE_CLASS      = 0x00000080, // animate
     ICC_WIN95_CLASSES      = 0x000000FF,
     ICC_DATE_CLASSES       = 0x00000100, // month picker, date picker, time picker, updown
     ICC_USEREX_CLASSES     = 0x00000200, // comboex
     ICC_COOL_CLASSES       = 0x00000400, // rebar (coolbar) control
     ICC_INTERNET_CLASSES   = 0x00000800,
     ICC_PAGESCROLLER_CLASS = 0x00001000,  // page scroller
     ICC_NATIVEFNTCTL_CLASS = 0x00002000,  // native font control
     ICC_STANDARD_CLASSES   = 0x00004000,
     ICC_LINK_CLASS     = 0x00008000
    }

User-Defined Field Types (VB.NET):

Public Enum CommonControls As UInteger
    ICC_LISTVIEW_CLASSES = &H1
    ' listview, header
    ICC_TREEVIEW_CLASSES = &H2
    ' treeview, tooltips
    ICC_BAR_CLASSES = &H4
    ' toolbar, statusbar, trackbar, tooltips
    ICC_TAB_CLASSES = &H8
    ' tab, tooltips
    ICC_UPDOWN_CLASS = &H10
    ' updown
    ICC_PROGRESS_CLASS = &H20
    ' progress
    ICC_HOTKEY_CLASS = &H40
    ' hotkey
    ICC_ANIMATE_CLASS = &H80
    ' animate
    ICC_WIN95_CLASSES = &Hff
    ICC_DATE_CLASSES = &H100
    ' month picker, date picker, time picker, updown
    ICC_USEREX_CLASSES = &H200
    ' comboex
    ICC_COOL_CLASSES = &H400
    ' rebar (coolbar) control
    ICC_INTERNET_CLASSES = &H800
    ICC_PAGESCROLLER_CLASS = &H1000
    ' page scroller
    ICC_NATIVEFNTCTL_CLASS = &H2000
    ' native font control
    ICC_STANDARD_CLASSES = &H4000
    ICC_LINK_CLASS = &H8000
End Enum

Notes:

None.

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