Reading Jpeg and Converting to HBITMAP - Help

Hi,

I have this project which I did some time ago in Dev C++ , Now I have to include some image processing in it mainly bitmap , gif and jpeg .
Until now I was using a masm code(dll) which is something like this :

<code>
LOCAL pwszFileName : DWORD, dwLength : DWORD, pPicture : DWORD, hNewBmp : DWORD

invoke CoTaskMemAlloc, eax
mov pwszFileName, eax
invoke MultiByteToWideChar, CP_ACP, 0, pszFileName, -1, pwszFileName, dwLength
..........
..........
..........
<code>

Which worked fine until it had to read a jpeg image taken from a nokia mobile.
It returned null for these particular files.
Why ?
What other options do I have to solve this problem? Since the project is too big and complicated,
porting it to vs is not possible.

Can somebody help me with it please?

sounds like an API issue and not a c++ issue. Go back to the .dll vendor and ask for support is my best suggestion. Secondly, why not convert the jpg to a gif or bitmap?