private void 关于ToolStripMenuItem_Click(object sender, EventArgs e) { if (!isExist("Formhelp")) { Formhelp formhelp = new Formhelp(); formhelp.MdiParent = this; formhelp.Show(); } }
private void 关于ToolStripMenuItem_Click(object sender, EventArgs e) { if (!isExist("Formhelp")) { Formhelp formhelp = new Formhelp(); formhelp.MdiParent = this; formhelp.Show(); } }