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public void Show_Form(string FrmName)
{
TabPage tb=tabControl1.TabPages["FrmName"];
this.tabControl_Agr.TabPages.Add(tb);
}
this.tabControl1.TabPages.Add(FrmName, FrmName);//增加
this.tabControl1.SelectedTab = this.tabControl1.TabPages[FrmName];//激活