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            static extern short GetKeyState( VirtualKeyStates nVirtKey );

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            public static bool IsKeyPressed( VirtualKeyStates testKey )

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            public enum VirtualKeyStates : int

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static extern short GetKeyState(VirtualKeyStates nVirtKey);

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enum VirtualKeyStates : int

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    return Convert.ToBoolean(GetKeyState(VirtualKeyStates.VK_LBUTTON) & KEY_PRESSED);

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The VirtualKeys (they're just mapped to the VK_* constants) and WindowsMessages enumeration have been omitted as it's quite lengthy.

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        wVk = EnumLib.VirtualKeyShort.KEY_S

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        wVk = EnumLib.VirtualKeyShort.KEY_S,

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        wVk = EnumLib.VirtualKeyShort.KEY_S

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        wVk = EnumLib.VirtualKeyShort.KEY_S,

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        wVk = EnumLib.VirtualKeyShort.KEY_S

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        wVk = EnumLib.VirtualKeyShort.KEY_S,

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   $_inputList.Add( $( New-Object Testing.Windows3+INPUT -Property @{ type = [Testing.Windows3+INPUT_TYPE]::KEYBOARD ; U = $( New-Object Testing.Windows3+InputUnion -Property @{ ki = $( New-Object Testing.Windows3+KEYBDINPUT -Property @{ wVk = [Testing.Windows3+VirtualKeyShort]::KEY_S } ) } ) } ) )

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   $_inputList.Add( $( New-Object Testing.Windows3+INPUT -Property @{ type = [Testing.Windows3+INPUT_TYPE]::KEYBOARD ; U = $( New-Object Testing.Windows3+InputUnion -Property @{ ki = $( New-Object Testing.Windows3+KEYBDINPUT -Property @{ wVk = [Testing.Windows3+VirtualKeyShort]::KEY_S ; dwFlags = $( [Testing.Windows3+KEYEVENTF]::KEYUP ) } ) } ) } ) )

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   $_inputList.Add( $( New-Object Testing.Windows3+INPUT -Property @{ type = [Testing.Windows3+INPUT_TYPE]::KEYBOARD ; U = $( New-Object Testing.Windows3+InputUnion -Property @{ ki = $( New-Object Testing.Windows3+KEYBDINPUT -Property @{ wVk = [Testing.Windows3+VirtualKeyShort]::MENU  } ) } ) } ) )

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   $_inputList.Add( $( New-Object Testing.Windows3+INPUT -Property @{ type = [Testing.Windows3+INPUT_TYPE]::KEYBOARD ; U = $( New-Object Testing.Windows3+InputUnion -Property @{ ki = $( New-Object Testing.Windows3+KEYBDINPUT -Property @{ wVk = [Testing.Windows3+VirtualKeyShort]::KEY_E } ) } ) } ) )

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   $_inputList.Add( $( New-Object Testing.Windows3+INPUT -Property @{ type = [Testing.Windows3+INPUT_TYPE]::KEYBOARD ; U = $( New-Object Testing.Windows3+InputUnion -Property @{ ki = $( New-Object Testing.Windows3+KEYBDINPUT -Property @{ wVk = [Testing.Windows3+VirtualKeyShort]::MENU  ; dwFlags = $( [Testing.Windows3+KEYEVENTF]::KEYUP ) } ) } ) } ) )

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   $_inputList.Add( $( New-Object Testing.Windows3+INPUT -Property @{ type = [Testing.Windows3+INPUT_TYPE]::KEYBOARD ; U = $( New-Object Testing.Windows3+InputUnion -Property @{ ki = $( New-Object Testing.Windows3+KEYBDINPUT -Property @{ wVk = [Testing.Windows3+VirtualKeyShort]::KEY_E ; dwFlags = $( [Testing.Windows3+KEYEVENTF]::KEYUP ) } ) } ) } ) )

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   $_inputList.Add( $( New-Object Testing.Windows3+INPUT -Property @{ type = [Testing.Windows3+INPUT_TYPE]::KEYBOARD ; U = $( New-Object Testing.Windows3+InputUnion -Property @{ ki = $( New-Object Testing.Windows3+KEYBDINPUT -Property @{ wVk = [Testing.Windows3+VirtualKeyShort]::CONTROL  } ) } ) } ) )

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   $_inputList.Add( $( New-Object Testing.Windows3+INPUT -Property @{ type = [Testing.Windows3+INPUT_TYPE]::KEYBOARD ; U = $( New-Object Testing.Windows3+InputUnion -Property @{ ki = $( New-Object Testing.Windows3+KEYBDINPUT -Property @{ wVk = [Testing.Windows3+VirtualKeyShort]::KEY_F } ) } ) } ) )

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   $_inputList.Add( $( New-Object Testing.Windows3+INPUT -Property @{ type = [Testing.Windows3+INPUT_TYPE]::KEYBOARD ; U = $( New-Object Testing.Windows3+InputUnion -Property @{ ki = $( New-Object Testing.Windows3+KEYBDINPUT -Property @{ wVk = [Testing.Windows3+VirtualKeyShort]::CONTROL  ; dwFlags = $( [Testing.Windows3+KEYEVENTF]::KEYUP ) } ) } ) } ) )

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   $_inputList.Add( $( New-Object Testing.Windows3+INPUT -Property @{ type = [Testing.Windows3+INPUT_TYPE]::KEYBOARD ; U = $( New-Object Testing.Windows3+InputUnion -Property @{ ki = $( New-Object Testing.Windows3+KEYBDINPUT -Property @{ wVk = [Testing.Windows3+VirtualKeyShort]::KEY_F ; dwFlags = $( [Testing.Windows3+KEYEVENTF]::KEYUP ) } ) } ) } ) )

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        internal VirtualKeyShort wVk;

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    internal enum VirtualKeyShort : short

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    public VirtualKeys wVirtualKeyCode;

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        public VirtualKeys VirtualKey;

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    Public VirtualKey As VirtualKeys

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    public enum VirtualKeys

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    ' NOTE :: The VirtualKeys enumeration is also managed as

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    Public Enum VirtualKeys

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Documentation

[VirtualKeys] on MSDN

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        //public VirtualKeys wVirtualKeyCode;