Issue with GetProcAddress need input

[funkmonkey]

Hi,

I'm working on a VBA project for work, and I'm having issues with GetProcAddress and LoadLibrary (But this works in a few directories, not where I need it from)

Below is the code, and just a simple call to get the address of a function, but I keep getting a return of (0).

Any input would be greatly appreciated.

This is the header of the C file.

#ifdef EPIQUTIL_EXPORTS
#define EPIQUTIL_API __declspec(dllexport)
#else
#define EPIQUTIL_API __declspec(dllimport)
#endif

// The functions needed to interface with VBA EPIQ Utils

// This function must be called before any other function.
extern "C" EPIQUTIL_API void EPIQ_init(const long MyWaitTime);


_________________________________________
This is the calls in VBA

    Dim hinstLib As LongPtr
    Dim hFreeLib As LongPtr
    Dim szFunc As String
    
    hinstLib = 0
    ProcAdd = 0
    hFreeLib = 0
    ' Get a handle to the DLL module.


        hinstLib = LoadLibrary("C:\Users\epperbx\source\repos\EPIQ Util DLL\Debug\EPIQ Util.dll")
 
        ' If the handle is valid, try to get the function address.
    
            ProcAdd = GetProcAddress(hinstLib, "EPIQ_Init")
            
            hFreeLib = FreeLibrary(hinstLib)

Am I missing a pointer to the function like in C/C++ in front of GetProcAddress? In any case, what ever input you can provide would be greatly appreciated.


I realized I had an UPPER CASE for EPIQ_init. Corrected that but still have the same issue.

[funkmonkey]

Hi,

I'm working on a VBA project for work, and I'm having issues with GetProcAddress and LoadLibrary (But this works in a few directories, not where I need it from)

Below is the code, and just a simple call to get the address of a function, but I keep getting a return of (0).

Any input would be greatly appreciated.

This is the header of the C file.

#ifdef EPIQUTIL_EXPORTS
#define EPIQUTIL_API __declspec(dllexport)
#else
#define EPIQUTIL_API __declspec(dllimport)
#endif

// The functions needed to interface with VBA EPIQ Utils

// This function must be called before any other function.
extern "C" EPIQUTIL_API void EPIQ_init(const long MyWaitTime);


_________________________________________
This is the calls in VBA

    Dim hinstLib As LongPtr
    Dim hFreeLib As LongPtr
    Dim szFunc As String
    
    hinstLib = 0
    ProcAdd = 0
    hFreeLib = 0
    ' Get a handle to the DLL module.


        hinstLib = LoadLibrary("C:\Users\epperbx\source\repos\EPIQ Util DLL\Debug\EPIQ Util.dll")
 
        ' If the handle is valid, try to get the function address.
    
            ProcAdd = GetProcAddress(hinstLib, "EPIQ_Init")
            
            hFreeLib = FreeLibrary(hinstLib)

Am I missing a pointer to the function like in C/C++ in front of GetProcAddress? In any case, what ever input you can provide would be greatly appreciated.


I realized I had an UPPER CASE for EPIQ_init. Corrected that but still have the same issue.

UPDATE: I setup loadlibrary and getprocaddress to obtain a messageboxW and a pointer from getprocaddress was accomplished. So I thought it was the DLL proc issue, but now I'm sure. Can someone review my DLL code and enlighten me as to what could be wrong?

#ifdef EPIQUTIL_EXPORTS
#define EPIQUTIL_API __declspec(dllexport)
#else
#define EPIQUTIL_API __declspec(dllimport)
#endif

// The functions needed to interface with VBA EPIQ Utils

// This function must be called before any other function.
extern "C" EPIQUTIL_API void EPIQ_init(const long MyWaitTime);

[salem_c]

> I realized I had an UPPER CASE for EPIQ_init. Corrected that but still have the same issue.
Are you sure?

Because both your posts show the case to be still a mix of lower and upper.

And start calling GetLastError every time something doesn't work, so you can find out more information.