Help with cracing Trymedia Activemark app

[jonwil]

I have a "fake dinput8.dll" with code like this

typedef HANDLE (WINAPI *cf) (LPCSTR lpFileName,DWORD dwDesiredAccess,DWORD dwShareMode,LPSECURITY_ATTRIBUTES lpSecurityAttributes,DWORD dwCreationDisposition,DWORD dwFlagsAndAttributes,HANDLE hTemplateFile);
cf Create_File;
typedef BOOL (WINAPI *rf) (HANDLE hFile,LPVOID lpBuffer,DWORD nNumberOfBytesToRead,LPDWORD lpNumberOfBytesRead,LPOVERLAPPED lpOverlapped);
rf Read_File;

HRESULT WINAPI DirectInput8Create(HINSTANCE hinst, DWORD dwVersion, REFIID riidltf, LPVOID *ppvOut, LPUNKNOWN punkOuter)
{
Create_File = (cf)0x11DC317;
Read_File = (rf)0x11EC5CC;
HANDLE hfile = Create_File("main.common.ovl",0x80000000,2,0,3,0,0);
void *x = malloc(100000000);
DWORD b;
Read_File(hfile,x,100000000,&b,0);
FILE *f = fopen("main.out","wb");
fwrite(x,b,1,f);
fclose(f);
HMODULE h = LoadLibrary("c:\\windows\\system\\dinput8.dll");
Create = (di8c)GetProcAddress(h,"DirectInput8Create");
return Create(hinst,dwVersion,riidltf,ppvOut,punkOuter);
}

This is then being placed in the game folder on a machine with a fully unlocked target.
The game is then run and promptly crashes.
With the addition of debugging output statements (snipped for clarity) I have established that the crash happens right when the call to Create_File is made.
When I run IDA on my dump without the "nop call" fixups, I can identify that 11DC317 is the redirected createfile.
And 11EC5CC is the redirected readfile.
Although when I did this code
FILE *cf = fopen("fopen.bin","wb");
fwrite(Create_File,30,1,cf);
fclose(cf);
to see what was at that memory location, the values in fopen.bin didnt match with what IDA says is at 11DC317

So obviously something somewhere means that the functions I need are not at the addresses I think they are.
Running a debugger on this machine is not an option, is there some other way I could obtain the right addresses to call for the redirected Create_File and Read_File?