CreateFile on Windows set to East Asian Locale

Question

1. I have a legacy application running on Windows with locale set to Korea (Hangul)
2. I created a GDIPLUS C++ wrapper for image compression (png, jpg,etc) to use in the legacy App.
3. The application has 2 processes A and B. Process B is a child of A.
4. Process B generates a bitmap and compresses it via the wrapper: Bitmap->Save(Hangul-file-name.png).
5. Process A attempts to open Hangul-file-name.png and fails with error code 123 (volume, path or filename invalid).
6. What is the WIN API used by Bitmap->Save() that enables it to successfully create Hangul-file-name.png?  I would think
that the Bitmap->Save() must eventually call CreateFile()??
7. Are there any flags I can add to the CreateFile() that would resolve this problem?

// Called from legacy application.
//  pszFileName - contains a DBCS ANSI Hangul path name "자동연결기능수행_(perform_autolink_functions)_ffbd"  volume info left out.
BOOL SavePng(char * pszFileName, HBITMAP bmhandle, HPALETTE palette, int quality)
{
 if(pszFileName == NULL)
  return FALSE;
 // Convert the smalltalk DBCS  ANSI string to unicode.
 int slength = strlen(pszFileName);
 wchar_t *uFilename = new wchar_t[slength + 1];
 uFilename[slength] = L'\0';
 MultiByteToWideChar(CP_ACP, 0, pszFileName, -1, uFilename, slength);

 BOOL result = SaveImage(uFilename, L"image/png", bmhandle, palette, quality);
 delete uFilename;
 return result;
}

// Create a compressed image file
BOOL SaveImage(LPCWSTR pszFileName, LPCWSTR encoding, HBITMAP bmhandle, HPALETTE palette, int quality)
{
 CLSID encoderClsid;
 if( GetEncoderClsid(encoding, &encoderClsid) > 0)
 {
  EncoderParameters encoderParameters;
  encoderParameters.Count = 1;
  encoderParameters.Parameter[0].Guid = EncoderQuality;
  encoderParameters.Parameter[0].Type = EncoderParameterValueTypeLong;
  encoderParameters.Parameter[0].NumberOfValues = 1;
  encoderParameters.Parameter[0].Value = &quality;
  Bitmap* bm = new Bitmap(bmhandle, palette);
  bm->Save(pszFileName,&encoderClsid, &encoderParameters);
  delete bm;
  return TRUE;
 }
 return FALSE;
}

// Attempt to open file for reading
//  pszFileName: "C:\CORE2net80\users\Administrator\자동연결기능수행_(perform_autolink_functions).png" (sample)
HANDLE OpenReadOnly(char * pszFileName)
{
 // Convert the smalltalk DBCS ansi string to unicode.
 int slength = strlen(pszFileName);

 int lenw = MultiByteToWideChar(CP_ACP, 0, pszFileName, slength, 0, 0);
 if(lenw > 0)
 {
  wchar_t *uFilename = new wchar_t[lenw + 1];
  uFilename[lenw] = L'\0';

  MultiByteToWideChar(CP_ACP, 0, pszFileName, slength, uFilename, lenw);

  HANDLE h = CreateFile(uFilename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
  if( h ==  INVALID_HANDLE_VALUE)
  {
   DWORD en = GetLastError(); // Error 123 (volume, path or filename invalid)
   return 0;
  }
  return h;
 }
 return 0;
}

Answer 1

I would suggest you check what is in uFileName after you converted it.

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Any samples given are not meant to have error checking or show best practices. They are meant to just illustrate a point. I may also give inefficient code or introduce some problems to discourage copy/paste coding. This is because the major point of my posts is to aid in the learning process.