今天图老师小编要向大家分享个隐藏当前进程教程,过程简单易学,相信聪明的你一定能轻松get!
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恢复当前窗口的程序,由于当前进程有可能在全屏模式下运行,所以需要通过指定特定的热键使程序窗口消失,且不出现在任务栏上。下面介绍如何用Delphi实现。主要需要解决两个问题,即隐藏窗口和设定热键。
一. 隐藏窗口
(本文来源于图老师网站,更多请访问http://www.tulaoshi.com/bianchengyuyan/)通过API函数GETACTIVEWINDOW获取当前窗口;函数ShowWindow(HWND,nCmdShow)的参数nCmdShow取SW_HIDE时将之隐藏,取SW_SHOW时将之显示。例如:showwindow(getactivewindow,sw_hide)。隐藏好窗体后,须记住窗体句柄以便恢复。
(本文来源于图老师网站,更多请访问http://www.tulaoshi.com/bianchengyuyan/)二. 键盘监控
为了实现键盘监控须用到钩子。
以下是程序的源文件:
---HKHide.pas---unit HKHide;interfaceuses Windows, Messages, sysutils;var hNextHookHide: HHook; HideSaveExit: Pointer; hbefore:longint;function KeyboardHookHandler(iCode: Integer;wParam: WPARAM;     lParam: LPARAM): LRESULT; stdcall; export;function EnableHideHook: BOOL; export;function DisableHideHook: BOOL; export;procedure HideHookExit; far;implementationfunction KeyboardHookHandler(iCode: Integer;wParam: WPARAM;     lParam: LPARAM): LRESULT; stdcall; export;const _KeyPressMask = $80000000;var f:textfile; temp:string;begin Result := 0; If iCode  0 Then begin  Result := CallNextHookEx(hNextHookHide, iCode, wParam, lParam);  Exit; end;// 侦测 Ctrl + Alt + F12 组合键 if ((lParam and _KeyPressMask) = 0) //按下时生效  and (GetKeyState(vk_Control)  0)  and (getkeystate(vk_menu)0) and (wParam = vk_F12) then begin  Result := 1;  //文件不存在则创建  if not fileexists(c:test.txt) then  begin   assignfile(f,c:test.txt);   rewrite(f);   writeln(f,0);   closefile(f);  end  else begin   assignfile(f,c:test.txt);   reset(f);   readln(f,temp);   hbefore:=strtoint(temp);   begin    hbefore:=getactivewindow;    temp:=inttostr(hbefore);    rewrite(f);    writeln(f,temp);    closefile(f);    ShowWindow(hbefore, SW_HIDE);   end   else begin    showwindow(hbefore,sw_show);    rewrite(f);    writeln(f,0);    closefile(f);   end;  end; end;end;function EnableHideHook: BOOL; export;begin Result := False; if hNextHookHide  0 then Exit; // 挂上 WH_KEYBOARD 这型的 HOOK, 同时, 传回值必须保留下 // 来, 免得 HOOK 呼叫链结断掉 hNextHookHide := SetWindowsHookEx(WH_KEYBOARD, KeyboardHookHandler,HInstance,0); Result := hNextHookHide  0;end;function DisableHideHook: BOOL; export;begin if hNextHookHide  0 then begin  Result:=True;  UnhookWindowshookEx(hNextHookHide); // 解除 Keyboard Hook  hNextHookHide:=0; end else  Result:=False;end;procedure HideHookExit;begin // 如果忘了解除 HOOK, 自动代理解除的动作 if hNextHookHide  0 then DisableHideHook; ExitProc := HideSaveExit;end;end.---HKPHide.dpr---library HKPHide;uses HKHide in HKHide.pas;exports EnableHideHook, DisableHideHook;begin hNextHookHide := 0; hbefore:=0; HideSaveExit := ExitProc; ExitProc := @HideHookExit;end.文件制作好后选Build All编译成HKPHide.dll。新建一个工程Project1---Unit1.pas---unit Unit1;interfaceuses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls;type TForm1 = class(TForm)  Button1: TButton;  Button2: TButton;  procedure Button1Click(Sender: TObject);  procedure Button2Click(Sender: TObject); private  { Private declarations } public  { Public declarations } end;var Form1: TForm1;implementation{$R *.DFM}function EnableHideHook: BOOL; external HKPHide.DLL;function DisableHideHook: BOOL; external HKPHide.DLL;procedure TForm1.Button1Click(Sender: TObject);begin if EnableHideHook then ShowMessage(HotKey Testing...);end;procedure TForm1.Button2Click(Sender: TObject);begin if DisableHideHook then ShowMessage(HotKey Testing..., DONE!!);end;end.运行程序按Button1后启动钩子,这时运行其他程序,按Ctrl+Alt+F12可将之隐藏,再按一下则恢复。以下程序在Delphi 4下通过。
来源:http://www.tulaoshi.com/n/20160219/1615269.html