private void WaiteForm_Load(object sender, EventArgs e)
        {
            this.BackColor = Color.White;
            this.TransparencyKey = Color.White;
        }
这是窗体的代码private void WaiteThreadFun()
        {
            WaiteForm wf = new WaiteForm();
            //wf.Parent = this.Parent;
            //wf.StartPosition = FormStartPosition.CenterParent;
            wf.StartPosition = FormStartPosition.CenterScreen;
            wf.ShowDialog();
            Thread.Sleep(1000000);
        }
窗体调用的代码