delphi MEMO 循环往上往下滚动

// 循环往上滚动

if Memo1.Perform(EM_SCROLL,SB_LINEDOWN,0)=0 then

begin

Memo1.Perform(WM_VSCROLL,SB_TOP,0);

end

else

begin

SendMessage(Memo1.Handle,WM_VSCROLL,SB_LINEDOWN,0);

end;

// 执行到底 SendMessage(Memo1.Handle, EM_SCROLL, SB_BOTTOM, 0);

//一步一步往下走 SendMessage(Memo1.Handle,WM_VSCROLL,SB_LINEDOWN,0);

// 往下走 SendMessage(Memo1.Handle,EM_SCROLL,SB_PAGEDOWN,0);

if Memo1.Perform(EM_SCROLL, SB_LINEDOWN, 0)=0 then//下滚

button2.Enable := False;

if Memo1.Perform(EM_SCROLL, SB_LINEUP, 0)=0 then//上滚

button1.Enable := False;

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