private void 打开工具栏ToolStripMenuItem_Click(object sender, EventArgs e) { FrmToolBox frm = FrmToolBox.Instance; frm.MdiParent = this; frm.Show(); }
private void toolStripButton1_Click(object sender, EventArgs e) { //FrmToolBox frm = new FrmToolBox(); //不能这么调用 FrmToolBox frm = FrmToolBox.Instance; frm.MdiParent = this; frm.Show(); }