ToolTip

ToolTip TTip_copy = new ToolTip();
// TTip_copy.SetToolTip(this.exDgv_Receive, "復製成功！複製內容為：" + exDgv_Receive.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString());
TTip_copy.Show("復製成功！內容為：" + exDgv_Receive.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString(), this.exDgv_Receive);