学步园

DLL部分：

#include <windows.h></p> <p>BOOL WINAPI DllMain(HINSTANCE hInstDll,DWORD dwReason,LPVOID lpReserved)<br /> {<br /> if(DLL_PROCESS_ATTACH == dwReason)<br /> MessageBox(NULL,"Entry","tip",MB_OK);<br /> else if(DLL_PROCESS_DETACH == dwReason)<br /> MessageBox(NULL,"Leave","tip",MB_OK);</p> <p> return TRUE;<br /> }</p> <p>extern "C" _declspec(dllexport) bool Inject(HWND hWnd = NULL)<br /> {<br /> if(hWnd)<br /> {<br /> ::SendMessage(hWnd,WM_SETTEXT,0,(LPARAM)"郭文艳");<br /> return true;<br /> }</p> <p> return false;<br /> }

Main部分：

#include <windows.h><br /> #include <iostream><br /> using namespace std;</p> <p>bool Inject(HWND hWnd = NULL,char* pName = NULL)<br /> {<br /> HANDLE hProcess = NULL;<br /> HANDLE hThread = NULL;<br /> LPVOID lpMem = NULL;<br /> HINSTANCE hInstDll = NULL;<br /> bool bSucceed = false;<br /> __try<br /> {<br /> DWORD dwProcessID = -1;<br /> GetWindowThreadProcessId(hWnd,&dwProcessID);<br /> hProcess = OpenProcess(PROCESS_ALL_ACCESS,FALSE,dwProcessID);<br /> if(NULL == hProcess)<br /> __leave;</p> <p> lpMem = VirtualAllocEx(hProcess,NULL,strlen(pName),MEM_RESERVE|MEM_COMMIT,PAGE_READWRITE);<br /> if(NULL == lpMem)<br /> __leave;</p> <p> DWORD dwWrite;<br /> if(WriteProcessMemory(hProcess,lpMem,(LPVOID)pName,strlen(pName),&dwWrite))<br /> {<br /> hInstDll = LoadLibrary("Dll1.dll");<br /> if(NULL == hInstDll)<br /> __leave;</p> <p> typedef bool (*INJECT)(HWND);<br /> INJECT lpInject = (INJECT)GetProcAddress(hInstDll,"Inject");<br /> if(NULL == lpInject)<br /> __leave;</p> <p> bSucceed == lpInject(hWnd);</p> <p> hThread = CreateRemoteThread(hProcess,NULL,0,(LPTHREAD_START_ROUTINE)GetProcAddress(GetModuleHandle("KERNEL32.dll"),"LoadLibraryA"),lpMem,0,NULL);<br /> if(NULL == hThread)<br /> __leave;<br /> }</p> <p> //bSucceed = true;<br /> }<br /> __finally<br /> {<br /> if(lpMem)<br /> VirtualFreeEx(hProcess,NULL,strlen(pName),MEM_RESERVE|MEM_COMMIT);</p> <p> if(hInstDll)<br /> FreeLibrary(hInstDll);</p> <p> if(hThread)<br /> CloseHandle(hThread);</p> <p> if(hProcess)<br /> CloseHandle(hProcess);<br /> }</p> <p> return bSucceed;<br /> }</p> <p>void main(int argc,TCHAR*argv[])<br /> {</p> <p> HWND hWnd = FindWindow("NotePad",NULL);<br /> if(NULL == hWnd)<br /> {<br /> cout<<"Fail to find window."<<endl;<br /> return;<br /> }</p> <p> char chName[] = "F://Win32Dll.dll";<br /> if(Inject(hWnd,chName))<br /> cout<<"Inject Succeed"<<endl;<br /> else<br /> cout<<"Inject Failed"<<endl;<br /> }