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When hooking an API, we need to write some kind of hook callback function and original API function variable var MessageBoxANext : function (hWnd: HWND; lpText, lpCaption: PAnsiChar; uType: UINT): Integer; stdcall; function MessageBoxACallback(hWnd: HWND; lpText, lpCaption: PAnsiChar; uType: UINT): Integer; stdcall; begin Result := MessageBoxANext(hWnd, lpText, 'Message From Dll', uType); end; Put all of code in a dll for global API hook like this procedure DllMain(dwReason: DWORD); begin case dwReason of DLL_PROCESS_ATTACH: begin HookAPI('user32.dll', 'MessageBoxA', @MessageBoxACallback, @MessageBoxANext); end; DLL_PROCESS_DETACH: begin UnHookAPI('user32.dll', 'MessageBoxA', @MessageBoxANext); end; end; end; begin DllProc := @DllMain; DllMain(DLL_PROCESS_ATTACH); end.

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Format:SoftwareSize:26 KB
Date:Jun 2008Version:1.1
License:Free
Platform:Windows
System Req:Windows NT 4 SP 6Windows 2003 SP 1Windows XP AMD 64-bitWindows XP 64-bit SP 1Windows NT 4 SP 2Windows 2000 SP 1Windows 2003 64-bitWindows 2003 AMD 64-bitWindows XP 64-bit SP 2Windows NT 4 SP 3Windows 2000 SP 2Windows Server 2003 x64 R2Windows 2000Windows

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