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//A窗体(父窗体):Form1:
private void button1_Click(object sender, EventArgs e)
{
Form2 frm = new Form2();
frm.MdiParent = this;
frm.Show();
}
//B(子窗体):Form2:
private void button1_Click(object sender, EventArgs e)
{
Form3 frm = new Form3();
frm.MdiParent = this.ParentForm;
frm.Show();
}
FormInNo info = new FormInNo();
info.MdiParent = MainMDIParent;
/*
报错:错误 7 “WindowsFormsApplication1.MainMDIParent”是“类型”,但此处被当做“变量”来使用 FormZX_ChangeBoat.cs 93 */