页尾:
Memo1->SelLength = 0;
Memo1->SelStart=Memo1->GetTextLen(); // position caret at end
Memo1->Perform( EM_SCROLLCARET, 0, 0 ); // ensure viewport is right
页首:
Memo1->SelLength = 0;
Memo1->SelStart=0;// position caret at start
Memo1->Perform( EM_SCROLLCARET, 0, 0 ); // ensure viewport is right