为什么我截图发送给一个答题接口，获得返回值之后传给游戏程序 取不到值。谢谢各位了

Question

static BOOL SyncGetAnswer(LPCSTR szJpgFile, LPCSTR& szAnswer)
{
BOOL bResult = FALSE;
HMODULE hMod = NULL;
TRYBLOCK_START
CHAR szPath[MAX_PATH] = {0};
// 发送答题
wsprintfA(szPath, "%s\lldm.dll", GetAppPath(GAME_REG_APPPATH));
if (!(hMod = LoadLibraryA(szPath)))
{
OutputDebugInfo("Load lldm.dll error: %d", GetLastError());
return FALSE;
}

CHAR szAuthcode[256] = {0};
wsprintfA(szPath, "%s\\游戏设置.ini", GetAppPath(GAME_REG_APPPATH));
GetPrivateProfileStringA("游戏设置", "答题串码", "", szAuthcode, sizeof(szAuthcode), szPath);
if (!szAuthcode[0])
    strcpy(szAuthcode, "tpgwb7r77uDzhDfb");

OutputDebugInfo("答题串码: %s", szAuthcode);
FUNC_SendFile SendFile = (FUNC_SendFile)(GetProcAddress(hMod, "SendFile"));
LPCSTR szId = SendFile(szAuthcode, szJpgFile, 5002, 30, 1, "");
if (szId[0] == '#')
{
    OutputDebugInfo("上传验证码失败: %s", szId);
    FreeLibrary(hMod);
    return FALSE;
}

// 接收答案
FUNC_GetAnswer GetAnswer = (FUNC_GetAnswer)(GetProcAddress(hMod, "GetAnswer"));
Sleep(3000);
for (int i=0; i<28; i++)
{       
    szAnswer = GetAnswer(szId);
    if (szAnswer && szAnswer[0])
        break;
    Sleep(1000);
}

if (!szAnswer || !szAnswer[0])
    OutputDebugInfo("Get answer timeout");
else if (szAnswer[0] == '#')
    OutputDebugInfo("获取验证码识别结果出错: %s", szAnswer);
else
    bResult = TRUE;
TRYBLOCK_END
FreeLibrary(hMod);
return bResult;

}

static BOOL ChooseAnswer(LPCSTR szAnswer)
{
switch (szAnswer[0])
{
case '1':
CGameCall::FightChooseOption("Ａ");
break;
case '2':
CGameCall::FightChooseOption("Ｂ");
break;
case '3':
CGameCall::FightChooseOption("Ｃ");
break;
case '4':
CGameCall::FightChooseOption("Ｄ");
break;
case '5':
CGameCall::FightChooseOption("Ｅ");
break;
default:
return FALSE;
}
return TRUE;
}

static BOOL CaptrueAndAnswer(VOID)
{
CImage image;
// 窗口截图
RECT rect = {220, 120, 620, 480};
if (!CaptureWindow(CGameWind::Instance().GetHandle(), rect, image))
return FALSE;

// 添加文本
if (!AddTextInfo(image))
    return FALSE;

// 保存文件
CHAR szJpgFile[MAX_PATH] = {0};
wsprintfA(szJpgFile, "%s\\%d.jpg", GetAppPath(GAME_REG_APPPATH), GetCurrentProcessId());
DeleteFileA(szJpgFile);
image.Save(szJpgFile, Gdiplus::ImageFormatJPEG);

// 发送答题
LPCSTR szAnswer = NULL;
if (!SyncGetAnswer(szJpgFile, szAnswer))

{
    return FALSE;

}else 
{
    OutputDebugInfo("Answer: %s", szAnswer);
    return ChooseAnswer(szAnswer);
}

}