private GlobalHotkey()
{
// We have to store the LowLevelKeyboardProc, so that it is not garbage collected runtime
hookedLowLevelKeyboardProc = LowLevelKeyboardProc;
// Set the hook
hookId = InterceptKeys.SetHook(hookedLowLevelKeyboardProc);
}
public SpecialKeyState CheckModifiers()
{
SpecialKeyState state = new SpecialKeyState();
if ((InterceptKeys.GetKeyState(VK_SHIFT) & 0x8000) != 0)
{
//SHIFT is pressed
state.ShiftPressed = true;
}
if ((InterceptKeys.GetKeyState(VK_CONTROL) & 0x8000) != 0)
{
//CONTROL is pressed
state.CtrlPressed = true;
}
if ((InterceptKeys.GetKeyState(VK_ALT) & 0x8000) != 0)
{
//ALT is pressed
state.AltPressed = true;
}
if ((InterceptKeys.GetKeyState(VK_WIN) & 0x8000) != 0)
{
//WIN is pressed
state.WinPressed = true;
}
return(state);
}
private IntPtr LowLevelKeyboardProc(int nCode, UIntPtr wParam, IntPtr lParam)
{
bool continues = true;
if (nCode >= 0)
{
if (wParam.ToUInt32() == (int)KeyEvent.WM_KEYDOWN ||
wParam.ToUInt32() == (int)KeyEvent.WM_KEYUP ||
wParam.ToUInt32() == (int)KeyEvent.WM_SYSKEYDOWN ||
wParam.ToUInt32() == (int)KeyEvent.WM_SYSKEYUP)
{
if (hookedKeyboardCallback != null)
{
continues = hookedKeyboardCallback((KeyEvent)wParam.ToUInt32(), Marshal.ReadInt32(lParam), CheckModifiers());
}
}
}
if (continues)
{
return(InterceptKeys.CallNextHookEx(hookId, nCode, wParam, lParam));
}
return((IntPtr)1);
}
public void Dispose()
{
InterceptKeys.UnhookWindowsHookEx(hookId);
}