用 API 实现的获取文本容器中选择的文本 - 回复 "roy.flex&#
发布时间:2020-12-15 03:37:39 所属栏目:百科 来源:网络整理
导读:问题来源: http://www.cnblogs.com/del/archive/2008/06/18/1083011.html#1229305 告诉 roy.flex 同学: 你的问题还是挺复杂的,先要完成的就是这一步; 再往下做,如果要捕获其他程序中的鼠标需要做 DLL; 不过还有个简单办法,就是用 TTimer 定时获取,这样也就不
问题来源:
http://www.cnblogs.com/del/archive/2008/06/18/1083011.html#1229305
告诉 roy.flex 同学: 你的问题还是挺复杂的,先要完成的就是这一步; 再往下做,如果要捕获其他程序中的鼠标需要做 DLL; 不过还有个简单办法,就是用 TTimer 定时获取,这样也就不用钩子了; 但是还需要知道要操作对象的句柄,这个可以参考: http://www.cnblogs.com/del/archive/2008/03/09/1097942.html 本例效果图: 代码文件: unit Unit1; interface uses Windows,Messages,SysUtils,Variants,Classes,Graphics,Controls,Forms,Dialogs,StdCtrls,ComCtrls,ExtCtrls; type TForm1 = class(TForm) Edit1: TEdit; Memo1: TMemo; RichEdit1: TRichEdit; Button1: TButton; Button2: TButton; Button3: TButton; procedure Button1Click(Sender: TObject); procedure Button2Click(Sender: TObject); procedure Button3Click(Sender: TObject); end; var Form1: TForm1; implementation {$R *.dfm} {用 API 实现的获取文本容器中选择的文本的函数} function GetEditSeleteText(h: HWND): string; var len,sx,ex: Integer; {文本总长度,选择的开始位置,选择的结束位置} buf: PChar; {所有文本} begin {获取文本总长度} len := SendMessage(h,WM_GETTEXTLENGTH,0) + 1; {为接受所有文本的缓冲区分配内存} buf := GlobalAllocPtr(0,len); {这里没有使用 GetMem,因为需要全局的,不然无法面对其他程序} {获取所有文本} SendMessage(h,WM_GETTEXT,len,Longint(buf)); {获取选择的开始位置和结束位置} SendMessage(h,EM_GETSEL,Longint(@sx),Longint(@ex)); {截取选择的文本} Result := Copy(buf,sx+1,ex-sx); {释放内存} GlobalFreePtr(buf); end; {测试 TEdit,同时与 VCL 的获取方法对比} procedure TForm1.Button1Click(Sender: TObject); begin ShowMessage(GetEditSeleteText(Edit1.Handle) + ' - ' + Edit1.SelText); end; {测试 TMemo,同时与 VCL 的获取方法对比} procedure TForm1.Button2Click(Sender: TObject); begin ShowMessage(GetEditSeleteText(Memo1.Handle) + ' - ' + Memo1.SelText); end; {测试 TRichEdit,同时与 VCL 的获取方法对比} procedure TForm1.Button3Click(Sender: TObject); begin ShowMessage(GetEditSeleteText(RichEdit1.Handle) + ' - ' + RichEdit1.SelText); end; end.窗体文件: object Form1: TForm1 Left = 0 Top = 0 Caption = 'Form1' ClientHeight = 145 ClientWidth = 181 Color = clBtnFace Font.Charset = DEFAULT_CHARSET Font.Color = clWindowText Font.Height = -11 Font.Name = 'Tahoma' Font.Style = [] OldCreateOrder = False Position = poDesktopCenter PixelsPerInch = 96 TextHeight = 13 object Button1: TButton Left = 95 Top = 8 Width = 75 Height = 25 Caption = 'Button1' TabOrder = 0 OnClick = Button1Click end object Edit1: TEdit Left = 8 Top = 8 Width = 81 Height = 21 TabOrder = 1 Text = 'Edit1' end object Memo1: TMemo Left = 8 Top = 35 Width = 81 Height = 46 Lines.Strings = ( 'Memo1') TabOrder = 2 end object RichEdit1: TRichEdit Left = 8 Top = 87 Width = 81 Height = 50 Font.Charset = GB2312_CHARSET Font.Color = clWindowText Font.Height = -11 Font.Name = 'Tahoma' Font.Style = [] Lines.Strings = ( 'RichEdit1') ParentFont = False TabOrder = 3 end object Button2: TButton Left = 95 Top = 56 Width = 75 Height = 25 Caption = 'Button2' TabOrder = 4 OnClick = Button2Click end object Button3: TButton Left = 95 Top = 112 Width = 75 Height = 25 Caption = 'Button3' TabOrder = 5 OnClick = Button3Click end end (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |