#ifndef _INC_MMSYSTEM
#include "mmsystem.h"
#endif

BOOL MyFunction(DWORD someparam) 
{
BOOL result=false;
HMODULE hWinMM=LoadLibrary("winmm.dll");
if (hWinMM) 
{
	typedef MMRESULT (WINAPI*midiOutPrepareHeader_Type)(HMIDIOUT hmo,LPMIDIHDR lpMidiOutHdr,UINT cbMidiOutHdr);
	typedef MMRESULT (WINAPI*midiOutLongMsg_Type)(HMIDIOUT hmo,LPMIDIHDR lpMidiOutHdr,UINT cbMidiOutHdr);
	typedef MMRESULT (WINAPI*midiOutUnprepareHeader_Type)(HMIDIOUT hmo,LPMIDIHDR lpMidiOutHdr,UINT cbMidiOutHdr);
	
	midiOutPrepareHeader_Type pmidiOutPrepareHeader=(midiOutPrepareHeader_Type)GetProcAddress(hWinMM,"midiOutPrepareHeader");
	midiOutLongMsg_Type pmidiOutLongMsg=(midiOutLongMsg_Type)GetProcAddress(hWinMM,"midiOutLongMsg");
	midiOutUnprepareHeader_Type pmidiOutUnprepareHeader=(midiOutUnprepareHeader_Type)GetProcAddress(hWinMM,"midiOutUnprepareHeader");
	
	if (pmidiOutPrepareHeader && pmidiOutLongMsg && pmidiOutUnprepareHeader 
	{
		//we now have all 3 function pointers and can call those functions...
		MMRESULT ret=pmidiOutPrepareHeader(something);
		if (ret==something) 
		{
			ret=pmidiOutLongMsg(something);
			pmidiOutUnprepareHeader(something);
		}
		result=(ret==0);
	}
	
	FreeLibrary(hWinMM);
}

return result;
}