> For the complete documentation index, see [llms.txt](https://nviasoft.gitbook.io/nviasoft-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nviasoft.gitbook.io/nviasoft-docs/api-reference/item-parsing/getmsginfo.md).

# GetMsgInfo

### int GetMsgInfo(int lMsgId, ref short nStream, ref short nFunction, ref short nWait, ref int nLength)

GetMsgInfo 함수는 **수신된** SECS 메시지의 헤더 정보를 추출할 때 사용합니다. 메시지의 Stream(S), Function(F), Wait Bit(W) 그리고 \*\*전체 메시지 길이(Length)\*\*를 한 번에 확인할 수 있어, 메시지 수신 후 어떤 로직으로 분기할지 결정하는 가장 기초적이면서도 중요한 함수입니다.

{% hint style="info" %}
OnMsgReceived() 함수에서 Stream,Function 별로 처리할 때 사용합니다.
{% endhint %}

Parameters

<table data-header-hidden><thead><tr><th width="149" valign="top"></th><th width="122" valign="top"></th><th valign="top"></th></tr></thead><tbody><tr><td valign="top">Name</td><td valign="top">Type</td><td valign="top">Description</td></tr><tr><td valign="top">lMsgId</td><td valign="top">int</td><td valign="top">수신한 Message의 ID</td></tr><tr><td valign="top">nStream</td><td valign="top">ref short</td><td valign="top">수신한 SECS 메시지의 Stream</td></tr><tr><td valign="top">nFunction</td><td valign="top">ref short</td><td valign="top">수신한 SECS 메시지의 Function</td></tr><tr><td valign="top">nWait</td><td valign="top">ref short</td><td valign="top">수신한 SECS 메시지의 Wbit</td></tr><tr><td valign="top">nLength</td><td valign="top">ref int</td><td valign="top">수신한 SECS 메시지의 length</td></tr></tbody></table>

```csharp
short nStream = 0;
    short nFunction = 0;
    short nWait = 0;
    int nLength = 0;

    // 1. 메시지 정보 추출
int nResult = m_gem.GetMsgInfo(lMsgId, ref nStream, ref nFunction, ref nWait, ref nLength);

if (nResult >= 0)
{
Console.WriteLine($"메시지 정보 - S{nStream}F{nFunction}, Wait:{nWait}, Length:{nLength}");

// 2. Stream/Function에 따른 로직 분기
if (nStream == 1 && nFunction == 1)
{
    // S1F1 (Are You There?) 처리
   ProcessS1F1(lMsgId);
}
else if (nStream == 2 && nFunction == 41)
{
    // S2F41 (Remote Command) 처리
    ProcessS2F41(lMsgId);
}
}
```


---

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