private int MouseHookProc(int nCode, IntPtr wParam, IntPtr lParam)
{
if (nCode < 0)
{
return(Win32Api.CallNextHookEx(hHook, nCode, wParam, lParam));
}
else
{
switch ((int)wParam)
{
case WM_LBUTTONDOWN:
MouseStateChanged?.Invoke(this, new MouseStateChangedEventArgs(1, true));
break;
case WM_RBUTTONDOWN:
MouseStateChanged?.Invoke(this, new MouseStateChangedEventArgs(2, true));
break;
case WM_MBUTTONDOWN:
MouseStateChanged?.Invoke(this, new MouseStateChangedEventArgs(3, true));
break;
case WM_LBUTTONUP:
MouseStateChanged?.Invoke(this, new MouseStateChangedEventArgs(1, false));
break;
case WM_RBUTTONUP:
MouseStateChanged?.Invoke(this, new MouseStateChangedEventArgs(2, false));
break;
case WM_MBUTTONUP:
MouseStateChanged?.Invoke(this, new MouseStateChangedEventArgs(3, false));
break;
}
return(Win32Api.CallNextHookEx(hHook, nCode, wParam, lParam));
}
}
/// <summary>Invokes the mouse state changed event.</summary>
/// <param name="e">The event args.</param>
protected virtual void OnMouseStateChanged(MouseStateEventArgs e)
{
Invalidate();
MouseStateChanged?.Invoke(e);
}
/// <summary>Invokes the mouse state changed event.</summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The event args.</param>
protected virtual void OnMouseStateChanged(object sender, MouseStateEventArgs e)
{
Invalidate();
MouseStateChanged?.Invoke(sender, e);
}