扫一扫
分享文章到微信
扫一扫
关注官方公众号
至顶头条
在本页阅读全文(共19页)
本程序演示如何通过程序来清空回收站。向窗体上添加一个TButton组件,它用于激活清空回收站的操作。
首先在程序的implementation段中定义3个常数和一个类型声明,代码如下:
const SHERB_NOCONFIRMATION = $00000001 ; SHERB_NOPROGRESSUI = $00000002 ; SHERB_NOSOUND = $00000004 ; type TSHEmptyRecycleBin= function(Wnd:HWND;LPCTSTR:PChar;DWORD:Word):Integer;stdcall; |
procedure TForm1.Button1Click(Sender: TObject); var SHEmptyRecycleBin:TSHEmptyRecycleBin; LibHandle:THandle; begin LibHandle := LoadLibrary(PChar(’Shell32.dll’)) ; if LibHandle <> 0 then begin @SHEmptyRecycleBin := GetProcAddress(LibHandle, ’SHEmptyRecycleBinA’); end else begin MessageDlg(’Failed to load Shell32.dll.’, mtError, [mbOK], 0); Exit ; end ; if @SHEmptyRecycleBin <> nil then begin SHEmptyRecycleBin(Application.Handle,’’,SHERB_NOCONFIRMATION or SHERB_NOPROGRESSUI or SHERB_NOSOUND) ; end; FreeLibrary(LibHandle); @SHEmptyRecycleBin := nil ; end; 程序代码如下: unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls; type TForm1 = class(TForm) Button1: TButton; procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end; var Form1: TForm1; implementation const SHERB_NOCONFIRMATION = $00000001 ; SHERB_NOPROGRESSUI = $00000002 ; SHERB_NOSOUND = $00000004 ; type TSHEmptyRecycleBin=function(Wnd:HWND;LPCTSTR:PChar;DWORD:Word):Integer;stdcall; {$R *.dfm} procedure TForm1.Button1Click(Sender: TObject); var SHEmptyRecycleBin:TSHEmptyRecycleBin; LibHandle:THandle; begin LibHandle := LoadLibrary(PChar(’Shell32.dll’)) ; if LibHandle <> 0 then begin @SHEmptyRecycleBin := GetProcAddress(LibHandle, ’SHEmptyRecycleBinA’); end else begin MessageDlg(’Failed to load Shell32.dll.’, mtError, [mbOK], 0); Exit ; end ; if @SHEmptyRecycleBin <> nil then begin SHEmptyRecycleBin(Application.Handle,’’, SHERB_NOCONFIRMATION or SHERB_NOPROGRESSUI or SHERB_NOSOUND) ; end; FreeLibrary(LibHandle); @SHEmptyRecycleBin := nil ; end; end. |
如果您非常迫切的想了解IT领域最新产品与技术信息,那么订阅至顶网技术邮件将是您的最佳途径之一。
现场直击|2021世界人工智能大会
直击5G创新地带,就在2021MWC上海
5G已至 转型当时——服务提供商如何把握转型的绝佳时机
寻找自己的Flag
华为开发者大会2020(Cloud)- 科技行者