public bool Register(Control windowControl)
{
// Check that we have not registered
if (this.registered)
{
return(false);
}
//{ throw new NotSupportedException("You cannot register a hotkey that is already registered"); }
// We can't register an empty hotkey
if (this.Empty)
{
return(false);
}
// { throw new NotSupportedException("You cannot register an empty hotkey"); }
// Get an ID for the hotkey and increase current ID
this.id = GlobalHotkey.currentID;
GlobalHotkey.currentID = GlobalHotkey.currentID + 1 % GlobalHotkey.maximumID;
// Translate modifier keys into unmanaged version
uint modifiers = (this.Alt ? GlobalHotkey.MOD_ALT : 0) | (this.Control ? GlobalHotkey.MOD_CONTROL : 0) |
(this.Shift ? GlobalHotkey.MOD_SHIFT : 0) | (this.Windows ? GlobalHotkey.MOD_WIN : 0);
// Register the hotkey
if (GlobalHotkey.RegisterHotKey(windowControl.Handle, this.id, modifiers, hotkeyInfo.keyCode) == 0)
{
// Is the error that the hotkey is registered?
if (Marshal.GetLastWin32Error() == ERROR_HOTKEY_ALREADY_REGISTERED)
{
return(false);
}
else
{
throw new Win32Exception();
}
}
// Save the control reference and register state
this.registered = true;
this.windowControl = windowControl;
// We successfully registered
return(true);
}
public void Unregister()
{
// Check that we have registered
if (!this.registered)
{
return;
}
// It's possible that the control itself has died: in that case, no need to unregister!
if (!this.windowControl.IsDisposed)
{
// Clean up after ourselves
if (GlobalHotkey.UnregisterHotKey(this.windowControl.Handle, this.id) == 0)
{
throw new Win32Exception();
}
}
// Clear the control reference and register state
this.registered = false;
this.windowControl = null;
}
