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Delphi

Hook.pas：源码内容

							unit Hook;
interface
uses Windows,Messages,Dialogs,Sysutils;
var
  hNextHookProc: HHook;
  procSaveExit: Pointer;
  function sethook:bool;export;
  function hookproc(iCode:Integer;wParam: WPARAM;lParam: LPARAM):LRESULT; stdcall;
  function endhook:bool;export;
  procedure HotKeyHookExit;far;
implementation
uses Controller;
function HookProc(iCode: integer; wParam: wParam; lParam: lParam):
LResult; stdcall;
var
    hwnd:dword;
    AppRect:TRect;
    title:pchar;
begin
    result:=0;
    if iCode<0 then
    begin
        CallNextHookEx(hnexthookproc,iCode,wParam,lParam);
        result:=0;
        Exit;
    end;
    if ((lParam and $80000000)=0) and (wParam=$6a) then
    begin
        hwnd:=getforegroundwindow;
        try
            GetWindowRect(hwnd,AppRect);
            CForm.Left:=(AppRect.Right-AppRect.Left) div 2;
            CForm.Top:=(AppRect.Bottom-AppRect.Top) div 2;
            CForm.Show;
        finally
        end;
        result:=1;
    end;
end;
function sethook:bool;export;
begin
    result:=false;
    if hnexthookproc<>0 then exit;
    hNextHookProc := SetWindowsHookEx(WH_KEYBOARD,hookproc,HInstance,0);
    Result := hNextHookProc <> 0;
end;
procedure hotkeyhookexit;
begin
    if hNextHookProc <> 0 then endHook;
        ExitProc := procSaveExit;
end;
function endhook:bool;export;
begin
    if hNextHookProc <> 0 then
    begin
        UnhookWindowshookEx(hNextHookProc); // 解除 Keyboard Hook
        hNextHookProc := 0;
    end;
    Result := hNextHookProc = 0;
end;
end.

						