Question

typedef struct
{
    // The contents of this struct are platform-dependent and subject to
    // change. You should not manipulate the contents of this struct directly.

    /*New stuff*/
//  HWND            m_hWnd;
//  HDEVNOTIFY      m_hDevNotify;

} fdGlove;


FGLOVEAPI fdGlove *fdOpen(char *pPort, bool bOnlyAllowSingleConnection = false);    
FGLOVEAPI int   fdClose(fdGlove *pFG);
FGLOVEAPI int   fdGetGloveHand(fdGlove *pFG);
FGLOVEAPI int   fdGetGloveType(fdGlove *pFG);

I have a DLL file called fglove.dll and I need using C# to call it.
I have written code like this:

    [StructLayout(LayoutKind.Sequential)]
    public class fdGlove
    { 

    }
    [DllImport("fglove.dll")]
    public static extern fdGlove fdOpen(string pPort, bool bOnlyAllowSingleConnection);

but when I debug the program it is has an error (Unable to find an entry point named ‘fdOpen’ in DLL ‘fglove.dll’.)

Can someone point out what I have done wrong?

Answer 1

look at the name of the exported symbol in Dependency Walker. More than likely it will be _fdImport or something similar and you will need to update your DLLImportAttribute to match the exported name.