GetASyncKeyState in CSharp 2.0

[DllImport("user32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]  
		public static extern long GetAsyncKeyState(long vKey);
		
		public static int AllKeys = {VK_0,VK_1,VK_2,VK_3,VK_4,VK_5,VK_6,VK_7,VK_8,VK_9,VK_A,VK_ADD,VK_ATTN,VK_B,VK_B,VK_BACK,VK_C,VK_CAPITAL,VK_CLEAR,VK_CONTEXTKEY,VK_CONTROL,VK_CRSEL,VK_D,VK_DECIMAL,VK_DELETE,VK_DIVIDE,VK_DOWN,VK_E,VK_END,VK_EREOF,VK_ESCAPE,VK_EXSEL,VK_F,VK_F1,VK_F10,
			VK_F11,VK_F12,VK_F13,VK_F14,VK_F15,VK_F16,VK_F17,VK_F18,VK_F19,VK_F2,VK_F20,VK_F21,VK_F22,VK_F23,VK_F24,VK_F3,VK_F4,VK_F5,VK_F6,VK_F7,VK_F8,VK_F9,VK_G,VK_H,VK_HELP,VK_HOME,VK_I,VK_ICO_00,VK_ICO_CLEAR,VK_ICO_F17,VK_ICO_F18,VK_ICO_HELP,VK_INSERT,VK_J,VK_K,VK_L,VK_LBUTTON,
			VK_LCONTROL,VK_LEFT,VK_LMENU,VK_LSHIFT,VK_M,VK_MBUTTON,VK_MENU,VK_MULTIPLY,VK_N,VK_NEXT,VK_NONAME,VK_NUMLOCK,VK_NUMPAD0,VK_NUMPAD1,VK_NUMPAD2,VK_NUMPAD3,VK_NUMPAD4,VK_NUMPAD5,VK_NUMPAD6,VK_NUMPAD7,VK_NUMPAD8,VK_NUMPAD8,VK_NUMPAD9,VK_O,VK_OEM_1,VK_OEM_2,VK_OEM_3,VK_OEM_4,
			VK_OEM_5,VK_OEM_6,VK_OEM_7,VK_OEM_ATTN,VK_OEM_AUTO,VK_OEM_BACKTAB,VK_OEM_CLEAR,VK_OEM_COMMA,VK_OEM_COPY,VK_OEM_CUSEL,VK_OEM_ENLW,VK_OEM_FINNISH,VK_OEM_JUMP,VK_OEM_MINUS,VK_OEM_PA1,VK_OEM_PA2,VK_OEM_PA3,VK_OEM_PERIOD,VK_OEM_PLUS,VK_OEM_RESET,VK_OEM_SCROLL,VK_OEM_WSCTRL,VK_OEM102,
			VK_P,VK_PA1,VK_PAUSE,VK_PLAY,VK_PRINT,VK_PRIOR,VK_Q,VK_R,VK_RBUTTON,VK_RCONTROL,VK_RETURN,VK_RIGHT,VK_RMENU,VK_RSHIFT,VK_S,VK_SHIFT,VK_SNAPSHOT,VK_SPACE,VK_STARTKEY,VK_SUBTRACT,VK_T,VK_TAB,VK_U,VK_UP,VK_V,VK_W,VK_X,VK_Y,VK_Z,VK_ZOOM};
		// GetAsyncKeyState vKey-Konstanten
			// Linker Mausbutton
		public const int VK_LBUTTON = 0x1;
			// Rechter Mausbutton
		public const int VK_RBUTTON = 0x2;
			// Mittlerer Mausbutton
		public const int VK_MBUTTON = 0x4;
			// Backspace Taste
		public const int VK_BACK = 0x8;
			// Tab Taste
		public const int VK_TAB = 0x9;
			// Numpad 5 ohne Numlock
		public const int VK_CLEAR = 0xc;
			// Enter Taste
		public const int VK_RETURN = 0xd;
			// Shift Taste
		public const int VK_SHIFT = 0x10;
			// STRG Taste
		public const int VK_CONTROL = 0x11;
			// Alt Taste
		public const int VK_MENU = 0x12;
			// Pause/Untbr
		public const int VK_PAUSE = 0x13;
			// Caps Lock/Feststelltaste
		public const int VK_CAPITAL = 0x14;
			// Escape
		public const int VK_ESCAPE = 0x1b;
			// Space/Leertaste
		public const int VK_SPACE = 0x20;
			// PageUp/Bild hoch
		public const int VK_PRIOR = 0x21;
			// PageDown/Bild runter
		public const int VK_NEXT = 0x22;
			// Ende
		public const int VK_END = 0x23;
			// Home/Pos1
		public const int VK_HOME = 0x24;
			// Linke Pfeiltaste
		public const int VK_LEFT = 0x25;
			// Obere Pfeiltaste
		public const int VK_UP = 0x26;
			// Rechte Pfeiltaste
		public const int VK_RIGHT = 0x27;
			// Untere Pfeiltaste
		public const int VK_DOWN = 0x28;
			// Drucken (Nokia Tastaturen)
		public const int VK_PRINT = 0x2a;
			// Drucken/S-Abf
		public const int VK_SNAPSHOT = 0x2c;
			// Einfügen
		public const int VK_INSERT = 0x2d;
			// Entfernen
		public const int VK_DELETE = 0x2e;
			// Hilfe
		public const int VK_HELP = 0x2f;
			// Taste 0
		public const int VK_0 = 0x30;
			// Taste 1
		public const int VK_1 = 0x31;
			// Taste 2
		public const int VK_2 = 0x32;
			// Taste 3
		public const int VK_3 = 0x33;
			// Taste 4
		public const int VK_4 = 0x34;
			// Taste 5
		public const int VK_5 = 0x35;
			// Taste 6
		public const int VK_6 = 0x36;
			// Taste 7
		public const int VK_7 = 0x37;
			// Taste 8
		public const int VK_8 = 0x38;
			// Taste 9
		public const int VK_9 = 0x39;
			// Taste A
		public const int VK_A = 0x41;
			// Taste B
		public const int VK_B = 0x42;
			// Taste C
		public const int VK_C = 0x43;
			// Taste D
		public const int VK_D = 0x44;
			// Taste E
		public const int VK_E = 0x45;
			// Taste F
		public const int VK_F = 0x46;
			// Taste G
		public const int VK_G = 0x47;
			// Taste H
		public const int VK_H = 0x48;
			// Taste I
		public const int VK_I = 0x49;
			// Taste J
		public const int VK_J = 0x4a;
			// Taste K
		public const int VK_K = 0x4b;
			// Taste L
		public const int VK_L = 0x4c;
			// Taste M
		public const int VK_M = 0x4d;
			// Taste N
		public const int VK_N = 0x4e;
			// Taste O
		public const int VK_O = 0x4f;
			// Taste P
		public const int VK_P = 0x50;
			// Taste Q
		public const int VK_Q = 0x51;
			// Taste R
		public const int VK_R = 0x52;
			// Taste S
		public const int VK_S = 0x53;
			// Taste T
		public const int VK_T = 0x54;
			// Taste U
		public const int VK_U = 0x55;
			// Taste V
		public const int VK_V = 0x56;
			// Taste W
		public const int VK_W = 0x57;
			// Taste X
		public const int VK_X = 0x58;
			// Taste Y
		public const int VK_Y = 0x59;
			// Taste Z
		public const int VK_Z = 0x5a;
			// Startmenütaste
		public const int VK_STARTKEY = 0x5b;
			// Kentextmenü
		public const int VK_CONTEXTKEY = 0x5d;
			// Numpad Taste 0
		public const int VK_NUMPAD0 = 0x60;
			// Numpad Taste 1
		public const int VK_NUMPAD1 = 0x61;
			// Numpad Taste 2
		public const int VK_NUMPAD2 = 0x62;
			// Numpad Taste 3
		public const int VK_NUMPAD3 = 0x63;
			// Numpad Taste 4
		public const int VK_NUMPAD4 = 0x64;
			// Numpad Taste 5
		public const int VK_NUMPAD5 = 0x65;
			// Numpad Taste 6
		public const int VK_NUMPAD6 = 0x66;
			// Numpad Taste 7
		public const int VK_NUMPAD7 = 0x67;
			// Numpad Taste 8
		public const int VK_NUMPAD8 = 0x68;
			// Numpad Taste 9
		public const int VK_NUMPAD9 = 0x69;
			// Numpad Multiplikations Taste (*)
		public const int VK_MULTIPLY = 0x6a;
			// Numpad Additions Taste (+)
		public const int VK_ADD = 0x6b;
			// Numpad Subtrations Taste (-)
		public const int VK_SUBTRACT = 0x6d;
			// Numpad Komma Taste (,)
		public const int VK_DECIMAL = 0x6e;
			// Numpad Devidierungs Taste (/)
		public const int VK_DIVIDE = 0x6f;
			// F1 Taste
		public const int VK_F1 = 0x70;
			// F2 Taste
		public const int VK_F2 = 0x71;
			// F3 Taste
		public const int VK_F3 = 0x72;
			// F4 Taste
		public const int VK_F4 = 0x73;
			// F5 Taste
		public const int VK_F5 = 0x74;
			// F6 Taste
		public const int VK_F6 = 0x75;
			// F7 Taste
		public const int VK_F7 = 0x76;
			// F8 Taste
		public const int VK_F8 = 0x77;
			// F9 Taste
		public const int VK_F9 = 0x78;
			// F10 Taste
		public const int VK_F10 = 0x79;
			// F11 Taste
		public const int VK_F11 = 0x7a;
			// F12 Taste
		public const int VK_F12 = 0x7b;
			// F13 Taste
		public const int VK_F13 = 0x7c;
			// F14 Taste
		public const int VK_F14 = 0x7d;
			// F15 Taste
		public const int VK_F15 = 0x7e;
			// F16 Taste
		public const int VK_F16 = 0x7f;
			// F17 Taste
		public const int VK_F17 = 0x80;
			// F18 Taste
		public const int VK_F18 = 0x81;
			// F19 Taste
		public const int VK_F19 = 0x82;
			// F20 Taste
		public const int VK_F20 = 0x83;
			// F21 Taste
		public const int VK_F21 = 0x84;
			// F22 Taste
		public const int VK_F22 = 0x85;
			// F23 Taste
		public const int VK_F23 = 0x86;
			// F24 Taste
		public const int VK_F24 = 0x87;
			// Numlock Taste
		public const int VK_NUMLOCK = 0x90;
			// Scroll Lock
		public const int VK_OEM_SCROLL = 0x91;
			// Linke Shift-Taste
		public const int VK_LSHIFT = 0xa0;
			// Rechte Shift-Taste
		public const int VK_RSHIFT = 0xa1;
			// Linke STRG-Taste
		public const int VK_LCONTROL = 0xa2;
			// Rechte STRG-Taste
		public const int VK_RCONTROL = 0xa3;
			// Linke ALT-Taste
		public const int VK_LMENU = 0xa4;
			// Rechte ALT-Taste
		public const int VK_RMENU = 0xa5;
			// ";"-Taste 
		public const int VK_OEM_1 = 0xba;
			// " 
		public const int VK_OEM_PLUS = 0xbb;
			// ","-Taste 
		public const int VK_OEM_COMMA = 0xbc;
			// "-"-Taste 
		public const int VK_OEM_MINUS = 0xbd;
			// "."-taste 
		public const int VK_OEM_PERIOD = 0xbe;
			// "/"-Taste 
		public const int VK_OEM_2 = 0xbf;
			// "`"-Taste 
		public const int VK_OEM_3 = 0xc0;
			// "["-Taste 
		public const int VK_OEM_4 = 0xdb;
			// "\"-Taste 
		public const int VK_OEM_5 = 0xdc;
			// "]"-Taste 
		public const int VK_OEM_6 = 0xdd;
			// " 
		public const int VK_OEM_7 = 0xde;
			// F17 einer Olivette Tastatur (Intern)
		public const int VK_ICO_F17 = 0xe0;
			// F18 einer Olivette Tastatur (Intern)
		public const int VK_ICO_F18 = 0xe1;
			// "<"-Taste oder "|"-Taste einer   
		public const int VK_OEM102 = 0xe2;
	// IBM-Kompatiblen 102 Tastatur (Nicht US)
			// Hilfetaste einer Olivetti Tastatur (Intern) 
		public const int VK_ICO_HELP = 0xe3;
			// 00-Taste einer Olivetti Tastatur (Intern)
		public const int VK_ICO_00 = 0xe4;
			// Löschen Taste einer Olivetti Tastatur (Intern) 
		public const int VK_ICO_CLEAR = 0xe6;
			// Reset Taste (Nokia)
		public const int VK_OEM_RESET = 0xe9;
			// Springen Taste (Nokia)
		public const int VK_OEM_JUMP = 0xea;
			// PA1 Taste (Nokia)
		public const int VK_OEM_PA1 = 0xeb;
			// PA2 Taste (Nokia)
		public const int VK_OEM_PA2 = 0xec;
			// PA3 Taste (Nokia)
		public const int VK_OEM_PA3 = 0xed;
			// WSCTRL Taste (Nokia)
		public const int VK_OEM_WSCTRL = 0xee;
			// WSCTRL Taste (Nokia)
		public const int VK_OEM_CUSEL = 0xef;
			// ATTN Taste (Nokia)
		public const int VK_OEM_ATTN = 0xf0;
			// Fertig Taste (Nokia)
		public const int VK_OEM_FINNISH = 0xf1;
			// Kopieren Taste (Nokia)
		public const int VK_OEM_COPY = 0xf2;
			// Auto Taste (Nokia)
		public const int VK_OEM_AUTO = 0xf3;
			// ENLW Taste (Nokia)
		public const int VK_OEM_ENLW = 0xf4;
			// BackTab Taste (Nokia)
		public const int VK_OEM_BACKTAB = 0xf5;
			// ATTN-Taste
		public const int VK_ATTN = 0xf6;
			// CRSEL-Taste
		public const int VK_CRSEL = 0xf7;
			// EXSEL-Taste
		public const int VK_EXSEL = 0xf8;
			// EREOF-Taste
		public const int VK_EREOF = 0xf9;
			// PLAY-Taste
		public const int VK_PLAY = 0xfa;
			// ZOOM-Taste
		public const int VK_ZOOM = 0xfb;
			// NONAME-Taste
		public const int VK_NONAME = 0xfc;
			// PA1-Taste
		public const int VK_PA1 = 0xfd;
			// OEM_CLEAR-Taste
		public const int VK_OEM_CLEAR = 0xfe;

		[DllImport("User32.dll")]  
		private static extern short GetAsyncKeyState(System.Windows.Forms.Keys vKey); // Keys enumeration
		[DllImport("User32.dll")]  
		private static extern short GetAsyncKeyState(System.Int32 vKey);
		
		Keys checkKey()
		{
			Keys pressedKey = Keys.Pa1;
			long Key = 0;
			foreach(Keys currentKey in Class1.AllKeys)
			{
				Key = GetAsyncKeyState(currentKey);
				if (Convert.ToBoolean(Key & 0x8000))
				{
					pressedKey = currentKey;
				}
			}
			return pressedKey;
		}

void UseKeyInfo()
		{
			do
			{
				Keys pressedKey = checkKey();
				if(pressedKey != Keys.Pa1)
				{
					if (pressedKey == Keys.F8)
					{
						MethodInvoker timer1Start = delegate
						{
							timer1.Start();
						};
						Invoke(timer1Start);
					}
					else if (pressedKey == Keys.F10)
					{
						MethodInvoker timer1Start = delegate
						{
							timer1.Stop();
						};
						Invoke(timer1Start);
					}
					else if (pressedKey == Keys.F9)
					{
						MethodInvoker Message = delegate
						{
							Process chat = new Process();
							chat.StartInfo.FileName="Chat.exe";  
							chat.StartInfo.WindowStyle=ProcessWindowStyle.Normal;
							try
							{
								chat.Start();
							}
							catch
							{
								if(bTest==true)
								{
									MessageBox.Show("Speichern Sie die " + Application.ProductName + ".exe in dem Ordern an dem sich der Chat befindet.","Datei nicht gefunden");  
								}
								bTest=false;
								button10.Visible = true;
							}
						};
						Invoke(Message);
					}
					pressedKey = Keys.Pa1;
				}
			}while(0==0);
		}