C# Definition:

struct KEYBDINPUT {
  public ushort wVk;
  public ushort wScan;
  public uint dwFlags;
  public uint time;
  public IntPtr dwExtraInfo;
}

VB Definition:

    <StructLayout(LayoutKind.Explicit)> _
    Private Structure KEYBDINPUT
    Public wVk As Short
    Public wScan As Short
    Public dwFlags As Integer
    Public time As Integer
    Public dwExtraInfo As IntPtr
    End Structure

User-Defined Field Types:

None.

Notes:

Changed C# definition to use unsigned types (to match WORD and DWORD types). Also made members public.