RichEdit中实现查找功能

　　RichEdit有一个FindText函数，极大方便了我们为RichEdit编制查找功能。下面的片断取自于Delphi帮助中的范例。

C Builder

请参照Delphi的例子

Delphi

procedure TMainForm.FindDialogFind(Sender: TObject);

var

FoundAt: LongInt;

StartPos, ToEnd: integer;

SearchFlag: TSearchTypes;

begin

if frMatchCase in FindDialog.Options then

SearchFlag:=[stMatchCase];

if frWholeWord in FindDialog.Options then

SearchFlag:=SearchFlag [stWholeWord];

with RichEdit do

begin

StartPos:=SelStart SelLength;

ToEnd:=Length(Text) - StartPos;

FoundAt:=FindText(FindDialog.FindText, StartPos, ToEnd, [stMatchCase]);

if FoundAt<>-1 then

begin

SetFocus;

SelStart:=FoundAt;

SelLength:=Length(FindDialog.FindText);

end

else

begin

SelLength:=0;

SelStart:=StartPos;

Application.MessageBox(PChar(找不到 FindDialog.FindText),查找失败,0);

end;

end;

end;