GetFileAttributes with environment variables

Question

I am trying to have a file exist or not in a path using vc++.

if (INVALID_FILE_ATTRIBUTES != GetFileAttributes(L"%windir%\Myfile.exe"))
        printf("\n %ws", sPath);

I've put Myfile.exe in windows directory. Still it is not giving me right output.

Please help me.

Answer 1

I've found that

CString GetEnvironmentVarValue(CString strEnvVarName)
{
    TCHAR szVarValue[MAX_PATH] = "" ;
    GetEnvironmentVariable(strEnvVarName.GetBuffer(0), szVarValue, sizeof(szVarValue)) ;
    GetLongPathName(szVarValue, szVarValue, sizeof(szVarValue)) ;
    return CString(szVarValue) ;
}