Getting album name in C# with IPC_GET_EXTENDED_FILE_INFO

[ThePike]

Hi,

I need a way to retrieve the album name for the currently playing track in winamp...

I've been trying the whole day to convert the samples I've found on IPC_GET_EXTENDED_FILE_INFO into C# code but without much luck.

Here's what I have:

PHP Code:

[DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern int SendMessage(IntPtr hWnd, [MarshalAs(UnmanagedType.U4)] int Msg, ref extendedFileInfoStruct wParam, IntPtr lParam);

const int WM_COMMAND = 0x111;
const int WM_WA_IPC = 0x0400;
const int IPC_GET_EXTENDED_FILE_INFO = 290;
const int IPC_GET_EXTENDED_FILE_INFO_HOOKABLE = 296;

//The structure
[StructLayout(LayoutKind.Sequential)]
public struct extendedFileInfoStruct
{
  public string filename;
  public string metadata;
  public uint retlen;
  [MarshalAs(UnmanagedType.LPStr, SizeConst = 256)]
  public string ret;
} 

//The code

extendedFileInfoStruct efi = new extendedFileInfoStruct();

efi.filename = "c:\\track.mp3";
efi.ret = "";
efi.retlen = 256;
efi.metadata = "ALBUM";

int i = SendMessage(hwnd, WM_WA_IPC, ref efi, (IntPtr)IPC_GET_EXTENDED_FILE_INFO); 


Well, the API call returns 0 and winamp crashes...
Anyone know anything on how to properly set up and allocate the extendedFileInfoStruct structure in c#?

Does the song have to be added to the media library?
Are there better ways to get the album name of current track?

[Joel]

Search for WinampMagic, maybe you can reproduce the api convection into c#... that's why I still prefer plugins in C++

[ThePike]

Thank you that really helped. Took a while but now its working...

[shao]

Did you manage to get this to work in your c# code? Is there any chance you could post the updated code?

Thanks in advance!

[ChaosBlade]

I'm also interested in this. Please post any working C# samples you have for us to mess around with