/// <summary>
/// Override F1 to prevent it from getting to MSHTML. Will fire the HelpRequested
/// event when the F1 key is pressed
/// </summary>
protected override IntPtr OnKeyHooked(int nCode, UIntPtr wParam, IntPtr lParam)
{
// only process HC_ACTION
if (nCode == HC.ACTION)
{
// We want one key event per key key-press. To do this we need to
// mask out key-down repeats and key-ups by making sure that bits 30
// and 31 of the lParam are NOT set. Bit 30 specifies the previous
// key state. The value is 1 if the key is down before the message is
// sent; it is 0 if the key is up. Bit 31 specifies the transition
// state. The value is 0 if the key is being pressed and 1 if it is
// being released. Therefore, we are only interested in key events
// where both bits are set to 0. To test for both of these bits being
// set to 0 we use the constant REDUNDANT_KEY_EVENT_MASK.
const uint REDUNDANT_KEY_EVENT_MASK = 0xC0000000;
if (((uint)lParam & REDUNDANT_KEY_EVENT_MASK) == 0)
{
// extract the keyCode and combine with modifier keys
Keys keyCombo =
((Keys)(int)wParam & Keys.KeyCode) | KeyboardHelper.GetModifierKeys();
if (_tabs.CheckForTabSwitch(keyCombo))
{
return(new IntPtr(1));
}
}
}
// key not handled by our hook, continue processing
return(CallNextHook(nCode, wParam, lParam));
}
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
tabs.CheckForTabSwitch(keyData);
return(base.ProcessCmdKey(ref msg, keyData));
}
