ListBox1.Perform(WM_VScroll, SB_LINEUP, 0); ListBox1.Perform(WM_VScroll, SB_LINEDOWN, 0);
{ Scroll Bar Commands } {$EXTERNALSYM SB_LINEUP} SB_LINEUP = 0; {$EXTERNALSYM SB_LINELEFT} SB_LINELEFT = 0; {$EXTERNALSYM SB_LINEDOWN} SB_LINEDOWN = 1; {$EXTERNALSYM SB_LINERIGHT} SB_LINERIGHT = 1; {$EXTERNALSYM SB_PAGEUP} SB_PAGEUP = 2; {$EXTERNALSYM SB_PAGELEFT} SB_PAGELEFT = 2; {$EXTERNALSYM SB_PAGEDOWN} SB_PAGEDOWN = 3; {$EXTERNALSYM SB_PAGERIGHT} SB_PAGERIGHT = 3; {$EXTERNALSYM SB_THUMBPOSITION} SB_THUMBPOSITION = 4; {$EXTERNALSYM SB_THUMBTRACK} SB_THUMBTRACK = 5; {$EXTERNALSYM SB_TOP} SB_TOP = 6; {$EXTERNALSYM SB_LEFT} SB_LEFT = 6; {$EXTERNALSYM SB_BOTTOM} SB_BOTTOM = 7; {$EXTERNALSYM SB_RIGHT} SB_RIGHT = 7; {$EXTERNALSYM SB_ENDSCROLL} SB_ENDSCROLL = 8;