private void EnableToolStripControl(ToolStrip toolstrip, ToolStripComboBox cb, bool enable)
{
if (toolstrip.InvokeRequired)
{
EnableToolStripControlCallback d = new EnableToolStripControlCallback(EnableToolStripControl);
toolstrip.BeginInvoke(d, new object[] { toolstrip, cb, enable });
}
else
{
cb.Enabled = enable;
}
}