62 lines
1.2 KiB
C++
62 lines
1.2 KiB
C++
|
// Copyright (c) 1998 Microsoft Corporation
|
||
|
|
#include <windows.h>
|
||
|
|
|
||
|
|
#include <objbase.h>
|
||
|
|
#include <assert.h>
|
||
|
|
#include <mmsystem.h>
|
||
|
|
#include <dsoundp.h>
|
||
|
|
|
||
|
|
#include "mmdevldr.h"
|
||
|
|
|
||
|
|
#include "dmusicc.h"
|
||
|
|
#include "..\dmusic\dmusicp.h"
|
||
|
|
#include "dmusic32.h"
|
||
|
|
#include "dm32p.h"
|
||
|
|
|
||
|
|
static CONST TCHAR cszMMDEVLDR[] = "\\\\.\\MMDEVLDR.VXD";
|
||
|
|
|
||
|
|
static HANDLE ghMMDEVLDR = INVALID_HANDLE_VALUE;
|
||
|
|
|
||
|
|
BOOL WINAPI OpenMMDEVLDR(
|
||
|
|
void)
|
||
|
|
{
|
||
|
|
ghMMDEVLDR = CreateFile(
|
||
|
|
cszMMDEVLDR,
|
||
|
|
GENERIC_WRITE,
|
||
|
|
FILE_SHARE_WRITE,
|
||
|
|
NULL,
|
||
|
|
OPEN_ALWAYS,
|
||
|
|
FILE_ATTRIBUTE_NORMAL,
|
||
|
|
NULL);
|
||
|
|
|
||
|
|
return ghMMDEVLDR != INVALID_HANDLE_VALUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
VOID WINAPI CloseMMDEVLDR(
|
||
|
|
void)
|
||
|
|
{
|
||
|
|
if (ghMMDEVLDR != INVALID_HANDLE_VALUE)
|
||
|
|
{
|
||
|
|
CloseHandle(ghMMDEVLDR);
|
||
|
|
ghMMDEVLDR = INVALID_HANDLE_VALUE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
VOID WINAPI CloseVxDHandle(
|
||
|
|
DWORD hVxDHandle)
|
||
|
|
{
|
||
|
|
DWORD cb;
|
||
|
|
|
||
|
|
DeviceIoControl(ghMMDEVLDR,
|
||
|
|
MMDEVLDR_IOCTL_CLOSEVXDHANDLE,
|
||
|
|
NULL,
|
||
|
|
0,
|
||
|
|
&hVxDHandle,
|
||
|
|
sizeof(hVxDHandle),
|
||
|
|
&cb,
|
||
|
|
NULL);
|
||
|
|
}
|