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using system;
using system.runtime.interopservices;
using system.text;
namespace consoleapplication8{
class class1{
[stathread]
static void main(string[] args){
// display current status of keys.
console.writeline(
"**before**\r\ncap: {0}\r\nscr: {1}\r\nnum: {2}",
keyboard.getstate(virtualkeys.vk_capital)?"on":"off",
keyboard.getstate(virtualkeys.vk_scroll)?"on":"off",
keyboard.getstate(virtualkeys.vk_numlock)?"on":"off"
);
// toggle all the keys:
keyboard.setstate(
virtualkeys.vk_capital,
!keyboard.getstate(virtualkeys.vk_capital)
);
keyboard.setstate(
virtualkeys.vk_scroll,
!keyboard.getstate(virtualkeys.vk_scroll)
);
keyboard.setstate(
virtualkeys.vk_numlock,
!keyboard.getstate(virtualkeys.vk_numlock)
);
// display new status of keys.
console.writeline(
"\r\n**after**\r\ncap: {0}\r\nscr: {1}\r\nnum: {2}",
keyboard.getstate(virtualkeys.vk_capital)?"on":"off",
keyboard.getstate(virtualkeys.vk_scroll)?"on":"off",
keyboard.getstate(virtualkeys.vk_numlock)?"on":"off"
);
console.readline();
}
}
public enum virtualkeys: byte{
vk_numlock = 0x90,
vk_scroll = 0x91,
vk_capital = 0x14
}
class keyboard{
const uint keyeventf_extendedkey = 0x1;
const uint keyeventf_keyup = 0x2;
[dllimport("user32.dll")]
static extern short getkeystate(int nvirtkey);
[dllimport("user32.dll")]
static extern void keybd_event(
byte bvk,
byte bscan,
uint dwflags,
uint dwextrainfo
);
public static bool getstate(virtualkeys key){
return (getkeystate((int)key)==1);
}
public static void setstate(virtualkeys key, bool state){
if(state!=getstate(key)){
keybd_event(
(byte)key,
0x45,
keyeventf_extendedkey | 0,
0
);
keybd_event(
(byte)key,
0x45,
keyeventf_extendedkey | keyeventf_keyup,
0
);
}
}
}
}
