GetLastError and FormatMessage and NewLine

When we use FormatMessage to get the system error message by the DWORD(from GetLastError), we will get a LPTSTR that end with NewLine (CRLF). How to convert to be NULL end string? It’s a very easy way to do it:

 

Code Snippet

1. CString CGetInfo::GetError(void){
2.     LPVOID lpMsgBuf;
3.     DWORD dw = GetLastError();
4.  
5.     FormatMessage(
6.         FORMAT_MESSAGE_ALLOCATE_BUFFER |
7.         FORMAT_MESSAGE_FROM_SYSTEM |
8.         FORMAT_MESSAGE_IGNORE_INSERTS,
9.         NULL,
10.         dw,
11.         MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
12.         (LPTSTR) &lpMsgBuf,
13.         0, NULL );
14.     CString s = (LPTSTR)lpMsgBuf;
15.     s.Remove('\r');
16.     s.Remove('\n');
17.     return s;
18. }

當我們在用win32 API裡面的FormatMessage去處理GetLastError傳出來的DWORD 錯誤碼的時候, FormatMessage會回傳一個LPTSTR, 以\r\n結尾的字串, 那怎麼把那個\r\n去掉呢? 其實很簡單, 用CString.Rmove() 兩行輕鬆解決.