GetAsyncKeyState in CSharp verwenden

Hallo zusammen,

da ich die letzten Tage viel nach einer Möglichkeit gesucht habe, die Funktion "GetAsyncKeyState" in C# nutzen zu können, möchte ich nun meinen Nachfolgern diese Suche erleichtern.

Im Nachfolgenden werde ich kurz zeigen, welche Codesnippets ihr benötigt.

Als erstes müsst ihr innerhalb eurer Klasse dieses Snippet einfügen

[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);

Nun könnt ihr die Funktion nutzen.

Ein kleines Beispiel der Anwendung wäre

long RetF8 = 0, RetF10 = 0,;

RetF8 = GetAsyncKeyState(Module1.VK_F8);
RetF10 = GetAsyncKeyState(Module1.VK_F10);

if (Convert.ToBoolean(RetF8 & 0x8000))
{
	timer1.Start();
}
if (Convert.ToBoolean(RetF10 & 0x8000)) 
{
	timer1.Stop();
}

Hier werden jetzt die Tastenanschläge geprüft.
Aus diesem Grund sollte dieser Part innerhalb eines Timers mit sehr kurzen Intervalen programmiert werden (ca. 50 ms)

Und um nun noch die einzellen Tasten zu erkennen fügen wir diese Klasse ein

public static class Module1
	{
	[DllImport("user32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]  
	public static extern long GetAsyncKeyState(long vKey);
	
		// 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;
}  //Klasse mit allen vKey-Konstanten

Fügt jetzt noch diese Zeilen an den Kopf eurer .cs-Datei

using System;
using System.Diagnostics;
using System.Windows.Forms;
using System.Runtime.InteropServices; 

Und schon seid ihr fertig.

Ich hoffe diese Snippets waren hilfreich für euch. Bei Fragen könnt ihr euch gerne melden.

Grüße

Bankaifan

Please also mark the comments that contributed to the solution of the article

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Printed on: April 27, 2024 at 01:04 o'clock

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