C / C++ / MFC

BOOL DlgMain::InstallDLL()
{
	LPTHREAD_START_ROUTINE lpRemoteThreadStartAddress
		=(LPTHREAD_START_ROUTINE)::GetProcAddress(m_hDllInstance_Kernel32,"LoadLibraryW");

	LPVOID pRemoteFunctionParam=
		::VirtualAllocEx(m_hProcess,NULL,MAX_PATH,MEM_COMMIT,PAGE_READWRITE);
	if (!pRemoteFunctionParam)
		return FALSE;
	if (!::WriteProcessMemory(m_hProcess,pRemoteFunctionParam,m_aChar_DllFullPath,MAX_PATH, NULL))
		return FALSE;
	HANDLE hThread=::CreateRemoteThread
		(m_hProcess,0,0,
		lpRemoteThreadStartAddress,
		pRemoteFunctionParam,
		0, 0);
	if (!hThread)
		return FALSE;
	::WaitForSingleObject(hThread,INFINITE);
	::GetExitCodeThread(hThread,(LPDWORD)&m_hModule_Dll);
	::CloseHandle(hThread);
	::VirtualFreeEx(m_hProcess, pRemoteFunctionParam,MAX_PATH,MEM_RELEASE);
	return TRUE;
}

BOOL DlgMain::UninstallDLL()
{
	LPTHREAD_START_ROUTINE lpRemoteThreadStartAddress
		=(LPTHREAD_START_ROUTINE)::GetProcAddress(m_hDllInstance_Kernel32,"FreeLibrary");
	
HANDLE hThread=CreateRemoteThread
		(m_hProcess,0,0,
		lpRemoteThreadStartAddress,
		(PVOID)m_hModule_Dll,
		0, 0);

	if (!hThread)
		return FALSE;

	::WaitForSingleObject(hThread,INFINITE);

	CloseHandle(hThread);
	return TRUE;
}

void CALLBACK ReceiveMidi(HMIDIIN hMidiIn, UINT wMsg, DWORD<br />
 dwInstance, <br />
DWORD wParam, DWORD lParam)

mReturnCode = <br />
midiInOpen(&hdlMidiIn,uhInID,(DWORD)ReceiveMidi,(DWORD)NULL,CALLBACK_FUNCTION);