if (e.KeyCode == Keys.Right)
                {
                        axAcroPDF1.gotoNextPage();
                }

                if (e.KeyCode == Keys.Left)
                { 
                        axAcroPDF1.gotoPreviousPage();
                }

                if (e.KeyCode == Keys.Up)
                {
                        axAcroPDF1.gotoPreviousPage();
                }

                if (e.KeyCode == Keys.Down)
                {
                        axAcroPDF1.gotoNextPage();
                }

                if (e.KeyCode == Keys.Home)
                {
                    axAcroPDF1.gotoFirstPage();
                }

                if (e.KeyCode == Keys.End)
                {
                    axAcroPDF1.gotoLastPage();
                }

                if (e.KeyCode == Keys.PageUp)
                {
                    axAcroPDF1.gotoPreviousPage();
                }

                if (e.KeyCode == Keys.PageDown)
                {
                    axAcroPDF1.gotoNextPage();
                }

                if (e.KeyCode == Keys.Add)
                {
                    zoom = zoom + 5;
                    axAcroPDF1.setZoom(zoom);
                }

                if (e.KeyCode == Keys.Subtract)
                {
                    zoom = zoom - 5;
                    axAcroPDF1.setZoom(zoom);
                }