private void MoveForm(object sender, MouseEventArgs e) { if (e.Button != MouseButtons.Left) { return; } SkinHelper.ReleaseCapture(); var findForm = ((Control)sender).FindForm(); if (findForm != null) { SkinHelper.SendMessage(findForm.Handle, SkinHelper.WM_NCLBUTTONDOWN, SkinHelper.HT_CAPTION, 0); } }