try
private void Form_MouseEnter(object sender, System.EventArgs e)
{
System.Windows.Forms.ToolBarButtonClickEventArgs e =new ToolBarButtonClickEventArgs(toolBarButtonRun);
this.toolBar1_ButtonClick(null,e)
}
private void Form_MouseEnter(object sender, System.EventArgs e)
{
System.Windows.Forms.ToolBarButtonClickEventArgs e =new ToolBarButtonClickEventArgs(toolBarButtonRun);
this.toolBar1_ButtonClick(null,e)
}
{
MessageBox.Show("运行");//
}这样吧。