Question : How to access functions from dll without a header file or lib file

I have a third party dll that im tring to access its functions but with no luck I can load the dll fine using loadlibary but when I try and load the functions into memory using GetProcAddress I get nothing the functions wont load. I have all the functions from the DLL by using dumpbin.exe I also used the tool called dllexp which returned the functions of the dll as well as there paramater. example two of the paramaters are void __cdecl cv20_clear(void) and void __cdecl cv20_receive(void (__cdecl*)(char *,int)) hopfully someone can show me how to access these function from my application
Thanks

Answer : How to access functions from dll without a header file or lib file

I think this program is free: http://www.ucware.com/apev/index.htm