include: Add some type aliases in dsound.h.

include/dsound.h

@@ -81,12 +81,17 @@ typedef struct IDirectSoundBuffer8 *LPDIRECTSOUNDBUFFER8,**LPLPDIRECTSOUNDBUFFER
 DEFINE_GUID(IID_IDirectSoundNotify,	0xB0210783,0x89cd,0x11d0,0xAF,0x08,0x00,0xA0,0xC9,0x25,0xCD,0x16);
 typedef struct IDirectSoundNotify *LPDIRECTSOUNDNOTIFY,**LPLPDIRECTSOUNDNOTIFY;
 #define	IID_IDirectSoundNotify8		IID_IDirectSoundNotify
+typedef struct IDirectSoundNotify IDirectSoundNotify8,*LPDIRECTSOUNDNOTIFY8;
 
 DEFINE_GUID(IID_IDirectSound3DListener,	0x279AFA84,0x4981,0x11CE,0xA5,0x21,0x00,0x20,0xAF,0x0B,0xE5,0x60);
 typedef struct IDirectSound3DListener *LPDIRECTSOUND3DLISTENER,**LPLPDIRECTSOUND3DLISTENER;
+#define IID_IDirectSound3DListener8 IID_IDirectSound3DListener
+typedef struct IDirectSound3DListener IDirectSound3DListener8,*LPDIRECTSOUND3DLISTENER8;
 
 DEFINE_GUID(IID_IDirectSound3DBuffer,	0x279AFA86,0x4981,0x11CE,0xA5,0x21,0x00,0x20,0xAF,0x0B,0xE5,0x60);
 typedef struct IDirectSound3DBuffer *LPDIRECTSOUND3DBUFFER,**LPLPDIRECTSOUND3DBUFFER;
+#define IID_IDirectSound3DBuffer8 IID_IDirectSound3DBuffer
+typedef struct IDirectSound3DBuffer IDirectSound3DBuffer8,*LPDIRECTSOUND3DBUFFER8;
 
 DEFINE_GUID(IID_IDirectSoundCapture,	0xB0210781,0x89CD,0x11D0,0xAF,0x08,0x00,0xA0,0xC9,0x25,0xCD,0x16);
 typedef struct IDirectSoundCapture *LPDIRECTSOUNDCAPTURE,**LPLPDIRECTSOUNDCAPTURE;
@@ -102,6 +107,7 @@ typedef struct IDirectSoundCaptureBuffer8 *LPDIRECTSOUNDCAPTUREBUFFER8,**LPLPDIR
 DEFINE_GUID(IID_IDirectSoundFullDuplex,	0xEDCB4C7A,0xDAAB,0x4216,0xA4,0x2E,0x6C,0x50,0x59,0x6D,0xDC,0x1D);
 typedef struct IDirectSoundFullDuplex *LPDIRECTSOUNDFULLDUPLEX,**LPLPDIRECTSOUNDFULLDUPLEX;
 #define	IID_IDirectSoundFullDuplex8	IID_IDirectSoundFullDuplex
+typedef struct IDirectSoundFullDuplex IDirectSoundFullDuplex8,*LPDIRECTSOUNDFULLDUPLEX8;
 
 DEFINE_GUID(IID_IDirectSoundFXI3DL2Reverb, 0x4b166a6a, 0x0d66, 0x43f3, 0x80, 0xe3, 0xee, 0x62, 0x80, 0xde, 0xe1, 0xa4);
 typedef struct IDirectSoundFXI3DL2Reverb  *LPDIRECTSOUNDFXI3DL2REVERB;