private void Form1_Load(object sender, EventArgs e)
        {
            this.SuspendLayout();
            ClassLibrary1.MoveForm mf = new ClassLibrary1.MoveForm(this);
            mf.lab_move(lab_logo);
            mf.lab_move(lab_ID);
            mf.lab_move(lab_PWD);
            gradually();
            this.ResumeLayout();        }
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