How do you pass a function as a parameter in vc++?

I have a dll(xyz.dll).
In xyz.h,I have two functions given below

typedef void DRMAPI  abc_t (int nPercentCompleted, void *const pUserData)
 
ErrorCode_t DRMAPI abc (const FC3Encode_t hEncodeHandle,abc_t *const fpCallBack, void *const pUserData)

 

I want to create application in vc++ with mfc.
My appliction header file code is

class MatchDynamicLibrary
{
private:
    typedef void (DRMAPI *Mabc_t)(int nPercentCompleted, void* const pUserData);
    typedef DrmErrorCode_t (DRMAPI *Mabc)(const FC3Encode_t hEncodeHandle, abc_t *const fpCallBack, void *const pUserData); 
 
public:
    void abc_t(int nPercentCompleted, void* const pUserData);
    DrmErrorCode_t abc(const FC3Encode_t hEncodeHandle, abc_t *const fpCallBack, void *const pUserData);
 
public:
    Mabc_t    m_fpabc_t;
    Mabc      m_fpabc; 
};

vc++ code file is

void MatchDynamicLibrary::Initialize()
{
    using std::swap;
    //
    PDynLib plibrary(new Drm::CXDynamicLibrary);
    #ifdef WIN32
    const char* szName="xyz.dll";
    #endif
 
    plibrary->Load(szName);
    
    Mabc_t fpabc_t=reinterpret_cast<Mabc_t>(plibrary->GetSymbol("abc_t"));
    Mabc fpabc=reinterpret_cast<Mabc>(plibrary->GetSymbol("abc"));
    swap(m_plib,plibrary);
    
    m_fpabc_t_t = fpabc_t;
    m_fpabc = fpabc;
    
}
 
DrmErrorCode_t MatchDynamicLibrary::abc(const FC3Encode_t hEncodeHandle, abc_t *const fpCallBack, void *const pUserData)
{
    return m_fpabc(hEncodeHandle, fpCallBack, pUserData);
}
 
DrmErrorCode_t MatchDynamicLibrary::abc_t(int nPercentCompleted, void *const pUserData)
{
    m_fpabc_t(nPercentCompleted, pUserData);
}

 
When I run , it gives error

error C206 1: syntax error : identifier 'abc_t'
error C2065: 'fpCallBack' : undelared identifier
error C2065: 'pUserData' : undelared identifier