C# Definition:

[StructLayout(LayoutKind.Sequential, Pack = 8, CharSet = CharSet.Unicode)]
public struct THUMBBUTTON
{
    public THUMBBUTTONMASK dwMask;
    public uint iId;
    public uint iBitmap;
    public IntPtr hIcon;

    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 259)]
    public string szTip;

    public THUMBBUTTONFLAGS dwFlags;
}    

VB Definition:

Structure THUMBBUTTON
   Public TODO
End Structure

Notes:

None.

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