C / C++ / MFC

DWORD WINAPI ChildThreadProc( HWND hWnd )
{
	TCHAR szBuffer[256];          // buffer
	DWORD dwSemCount = 0;         // printing semaphore count
	HANDLE hSemaphore = OpenSemaphore( SYNCHRONIZE, FALSE, "TEST SEMAPHORE");
	wsprintf(szBuffer, "Thread %x waiting for semaphore %x", GetCurrentThreadId(), hSemaphore );
	SendMessage(hWnd, WM_USER, 0, (LPARAM)szBuffer);
	// Check for signaled semaphore
	WaitForSingleObject( hSemaphore, INFINITE );
	wsprintf(szBuffer, "Thread %x got semaphore", GetCurrentThreadId() );
	SendMessage(hWnd, WM_USER, 0, (LPARAM)szBuffer);
	Sleep(5000);
	//dwSCount = dwSemCount;
	//Release semaphore
	ReleaseSemaphore( hSemaphore, 1, (LPLONG)&dwSCount );
	wsprintf( szBuffer, "Thread %x is done with semaphore. Its count was %ld.", GetCurrentThreadId(), dwSemCount );
	SendMessage( hWnd, WM_USER, 0, (LPARAM)szBuffer );
	CloseHandle( hSemaphore );
	ExitThread ( TRUE );
}

CMystatic::CMystatic()
{
    width = 0;
    mod = LoadLibrary(TEXT("C:\\SYSADATA\\SYSADATA\\x64\\Debug\\SYSADATA.DLL"));
    drawptr = (fownerdraw)GetProcAddress(mod, "ownerdraw");
    strsize.cx = 0;
    strsize.cy = 0;
    myexitparm = &exitparm;
}

void CMystatic::DrawItem(LPDRAWITEMSTRUCT pdi)
{
    
    exitparm.pdi = pdi;
    exitparm.sizeptr = &strsize;
    
    (drawptr)(myexitparm);
    
}

 typedef struct EXITPARM
{
    LPDRAWITEMSTRUCT pdi;
    SIZE* sizeptr;

};
// void  ownerdraw(exitparmptr);
typedef struct EXITPARM* exitparmptr;
__declspec(dllexport) void ownerdraw(exitparmptr parmptr);

void  ownerdraw(exitparmptr parmptr)
{
    
    LPDRAWITEMSTRUCT pdi = parmptr->pdi;
   // (char*)myexit += 8;
    SIZE* mysize = parmptr->sizeptr;