public void AddFilter(Keys KeyCode, bool Ctrl, bool Alt, bool Shift)
{
KeyStroke newFilter = new KeyStroke();
newFilter.KeyCode = KeyCode;
newFilter.Shift = Shift;
newFilter.Alt = Alt;
newFilter.Ctrl = Ctrl;
m_Filters.Add(newFilter);
}
private bool CheckFilters(KeyStroke state)
{
if (m_Filters.Count == 0)
return true;
foreach (KeyStroke filter in m_Filters)
{
if (filter.IsMatch(state))
return true;
}
return false;
}
private void KeyboardHook_HookInvoked(object sender, HookEventArgs e)
{
try
{
if (e.HookCode != 0)
return;
KeyStroke key = new KeyStroke();
key.KeyCode = (Keys)e.wParam.ToInt32();
key.Shift = GetKeyState(VirtualKeys.VK_SHIFT) <= -127;
key.Alt = GetKeyState(VirtualKeys.VK_MENU) <= -127;
key.Ctrl = GetKeyState(VirtualKeys.VK_CONTROL) <= -127;
KeyboardHookEventArgs keyboardEventArgs = new KeyboardHookEventArgs(key);
KeyboardMessageFlags kmf = new KeyboardMessageFlags(e.lParam.ToInt32());
if (CheckFilters(key) && !kmf.IsBeingReleased)
{
OnKeyPressed (keyboardEventArgs);
}
}
catch (Exception)
{
}
}
/// <summary>
/// Checks if the given keystroke matches the filter.
/// Matching
/// </summary>
/// <param name="keystroke"></param>
/// <returns></returns>
public bool IsMatch(KeyStroke keystroke)
{
return
this.KeyCode == Keys.None ? true : keystroke.KeyCode == this.KeyCode &&
keystroke.Ctrl == this.Ctrl &&
keystroke.Alt == this.Alt &&
keystroke.Shift == this.Shift;
}
public KeyboardHookEventArgs(KeyStroke Key)
{
this.KeyStroke = Key;
}
