diff --git a/channels/audin/server/audin.c b/channels/audin/server/audin.c
index 564630d8c..bc74c1f63 100644
--- a/channels/audin/server/audin.c
+++ b/channels/audin/server/audin.c
@@ -78,7 +78,7 @@ static void audin_server_send_version(audin_server* audin, wStream* s)
 {
 	Stream_Write_UINT8(s, MSG_SNDIN_VERSION);
 	Stream_Write_UINT32(s, 1); /* Version (4 bytes) */
-	WTSVirtualChannelWrite(audin->audin_channel, Stream_Buffer(s), Stream_GetPosition(s), NULL);
+	WTSVirtualChannelWrite(audin->audin_channel, (PCHAR) Stream_Buffer(s), Stream_GetPosition(s), NULL);
 }
 
 static BOOL audin_server_recv_version(audin_server* audin, wStream* s, UINT32 length)
@@ -130,7 +130,7 @@ static void audin_server_send_formats(audin_server* audin, wStream* s)
 		}
 	}
 
-	WTSVirtualChannelWrite(audin->audin_channel, Stream_Buffer(s), Stream_GetPosition(s), NULL);
+	WTSVirtualChannelWrite(audin->audin_channel, (PCHAR) Stream_Buffer(s), Stream_GetPosition(s), NULL);
 }
 
 static BOOL audin_server_recv_formats(audin_server* audin, wStream* s, UINT32 length)
@@ -166,6 +166,7 @@ static BOOL audin_server_recv_formats(audin_server* audin, wStream* s, UINT32 le
 		Stream_Read_UINT16(s, audin->context.client_formats[i].nBlockAlign);
 		Stream_Read_UINT16(s, audin->context.client_formats[i].wBitsPerSample);
 		Stream_Read_UINT16(s, audin->context.client_formats[i].cbSize);
+
 		if (audin->context.client_formats[i].cbSize > 0)
 		{
 			Stream_Seek(s, audin->context.client_formats[i].cbSize);
@@ -201,7 +202,7 @@ static void audin_server_send_open(audin_server* audin, wStream* s)
 	Stream_Write_UINT16(s, 16); /* wBitsPerSample */
 	Stream_Write_UINT16(s, 0); /* cbSize */
 
-	WTSVirtualChannelWrite(audin->audin_channel, Stream_Buffer(s), Stream_GetPosition(s), NULL);
+	WTSVirtualChannelWrite(audin->audin_channel, (PCHAR) Stream_Buffer(s), Stream_GetPosition(s), NULL);
 }
 
 static BOOL audin_server_recv_open_reply(audin_server* audin, wStream* s, UINT32 length)
@@ -283,10 +284,10 @@ static void* audin_server_thread_func(void* arg)
 	void* buffer;
 	BYTE MessageId;
 	BOOL ready = FALSE;
-	UINT32 bytes_returned = 0;
+	DWORD BytesReturned = 0;
 	audin_server* audin = (audin_server*) arg;
 
-	if (WTSVirtualChannelQuery(audin->audin_channel, WTSVirtualFileHandle, &buffer, &bytes_returned) == TRUE)
+	if (WTSVirtualChannelQuery(audin->audin_channel, WTSVirtualFileHandle, &buffer, &BytesReturned) == TRUE)
 	{
 		fd = *((void**) buffer);
 		WTSFreeMemory(buffer);
@@ -303,7 +304,7 @@ static void* audin_server_thread_func(void* arg)
 		if (WaitForSingleObject(audin->stopEvent, 0) == WAIT_OBJECT_0)
 			break;
 
-		if (WTSVirtualChannelQuery(audin->audin_channel, WTSVirtualChannelReady, &buffer, &bytes_returned) == FALSE)
+		if (WTSVirtualChannelQuery(audin->audin_channel, WTSVirtualChannelReady, &buffer, &BytesReturned) == FALSE)
 			break;
 
 		ready = *((BOOL*) buffer);
@@ -330,46 +331,48 @@ static void* audin_server_thread_func(void* arg)
 
 		Stream_SetPosition(s, 0);
 
-		if (WTSVirtualChannelRead(audin->audin_channel, 0, Stream_Buffer(s),
-			Stream_Capacity(s), &bytes_returned) == FALSE)
+		if (WTSVirtualChannelRead(audin->audin_channel, 0, (PCHAR) Stream_Buffer(s),
+			Stream_Capacity(s), &BytesReturned) == FALSE)
 		{
-			if (bytes_returned == 0)
+			if (BytesReturned == 0)
 				break;
 			
-			Stream_EnsureRemainingCapacity(s, (int) bytes_returned);
+			Stream_EnsureRemainingCapacity(s, BytesReturned);
 
-			if (WTSVirtualChannelRead(audin->audin_channel, 0, Stream_Buffer(s),
-				Stream_Capacity(s), &bytes_returned) == FALSE)
+			if (WTSVirtualChannelRead(audin->audin_channel, 0, (PCHAR) Stream_Buffer(s),
+				Stream_Capacity(s), &BytesReturned) == FALSE)
+			{
 				break;
+			}
 		}
 
-		if (bytes_returned < 1)
+		if (BytesReturned < 1)
 			continue;
 
 		Stream_Read_UINT8(s, MessageId);
-		bytes_returned--;
+		BytesReturned--;
 
 		switch (MessageId)
 		{
 			case MSG_SNDIN_VERSION:
-				if (audin_server_recv_version(audin, s, bytes_returned))
+				if (audin_server_recv_version(audin, s, BytesReturned))
 					audin_server_send_formats(audin, s);
 				break;
 
 			case MSG_SNDIN_FORMATS:
-				if (audin_server_recv_formats(audin, s, bytes_returned))
+				if (audin_server_recv_formats(audin, s, BytesReturned))
 					audin_server_send_open(audin, s);
 				break;
 
 			case MSG_SNDIN_OPEN_REPLY:
-				audin_server_recv_open_reply(audin, s, bytes_returned);
+				audin_server_recv_open_reply(audin, s, BytesReturned);
 				break;
 
 			case MSG_SNDIN_DATA_INCOMING:
 				break;
 
 			case MSG_SNDIN_DATA:
-				audin_server_recv_data(audin, s, bytes_returned);
+				audin_server_recv_data(audin, s, BytesReturned);
 				break;
 
 			case MSG_SNDIN_FORMATCHANGE:
diff --git a/channels/cliprdr/server/cliprdr_main.c b/channels/cliprdr/server/cliprdr_main.c
index 6744748c5..c3c35c669 100644
--- a/channels/cliprdr/server/cliprdr_main.c
+++ b/channels/cliprdr/server/cliprdr_main.c
@@ -96,7 +96,7 @@ static int cliprdr_server_send_capabilities(CliprdrServerContext* context)
 
 	Stream_SealLength(s);
 
-	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, Stream_Buffer(s), Stream_Length(s), NULL);
+	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, (PCHAR) Stream_Buffer(s), Stream_Length(s), NULL);
 
 	Stream_Free(s, TRUE);
 
@@ -123,7 +123,7 @@ static int cliprdr_server_send_monitor_ready(CliprdrServerContext* context)
 
 	Stream_SealLength(s);
 
-	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, Stream_Buffer(s), Stream_Length(s), NULL);
+	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, (PCHAR) Stream_Buffer(s), Stream_Length(s), NULL);
 
 	Stream_Free(s, TRUE);
 
@@ -150,7 +150,7 @@ static int cliprdr_server_send_format_list_response(CliprdrServerContext* contex
 
 	Stream_SealLength(s);
 
-	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, Stream_Buffer(s), Stream_Length(s), NULL);
+	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, (PCHAR) Stream_Buffer(s), Stream_Length(s), NULL);
 
 	Stream_Free(s, TRUE);
 
@@ -392,7 +392,7 @@ static void* cliprdr_server_thread(void* arg)
 	int position;
 	HANDLE events[8];
 	HANDLE ChannelEvent;
-	UINT32 BytesReturned;
+	DWORD BytesReturned;
 	CLIPRDR_HEADER header;
 	CliprdrServerContext* context;
 
@@ -429,7 +429,7 @@ static void* cliprdr_server_thread(void* arg)
 		}
 
 		if (WTSVirtualChannelRead(context->priv->ChannelHandle, 0,
-				Stream_Buffer(s), Stream_Capacity(s), &BytesReturned))
+				(PCHAR) Stream_Buffer(s), Stream_Capacity(s), &BytesReturned))
 		{
 			if (BytesReturned)
 				Stream_Seek(s, BytesReturned);
diff --git a/channels/drdynvc/server/drdynvc_main.c b/channels/drdynvc/server/drdynvc_main.c
index 2897023d4..ecca8e587 100644
--- a/channels/drdynvc/server/drdynvc_main.c
+++ b/channels/drdynvc/server/drdynvc_main.c
@@ -35,7 +35,7 @@ static void* drdynvc_server_thread(void* arg)
 	void* buffer;
 	HANDLE events[8];
 	HANDLE ChannelEvent;
-	UINT32 BytesReturned;
+	DWORD BytesReturned;
 	DrdynvcServerContext* context;
 
 	context = (DrdynvcServerContext*) arg;
diff --git a/channels/rdpdr/server/rdpdr_main.c b/channels/rdpdr/server/rdpdr_main.c
index c55b6ec1b..58f057bac 100644
--- a/channels/rdpdr/server/rdpdr_main.c
+++ b/channels/rdpdr/server/rdpdr_main.c
@@ -51,7 +51,7 @@ static int rdpdr_server_send_announce_request(RdpdrServerContext* context)
 
 	Stream_SealLength(s);
 
-	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, Stream_Buffer(s), Stream_Length(s), NULL);
+	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, (PCHAR) Stream_Buffer(s), Stream_Length(s), NULL);
 
 	Stream_Free(s, TRUE);
 
@@ -319,7 +319,7 @@ static int rdpdr_server_send_core_capability_request(RdpdrServerContext* context
 
 	Stream_SealLength(s);
 
-	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, Stream_Buffer(s), Stream_Length(s), NULL);
+	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, (PCHAR) Stream_Buffer(s), Stream_Length(s), NULL);
 
 	Stream_Free(s, TRUE);
 
@@ -393,7 +393,7 @@ static int rdpdr_server_send_client_id_confirm(RdpdrServerContext* context)
 
 	Stream_SealLength(s);
 
-	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, Stream_Buffer(s), Stream_Length(s), NULL);
+	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, (PCHAR) Stream_Buffer(s), Stream_Length(s), NULL);
 
 	Stream_Free(s, TRUE);
 
@@ -470,7 +470,7 @@ static int rdpdr_server_send_user_logged_on(RdpdrServerContext* context)
 
 	Stream_SealLength(s);
 
-	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, Stream_Buffer(s), Stream_Length(s), NULL);
+	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, (PCHAR) Stream_Buffer(s), Stream_Length(s), NULL);
 
 	Stream_Free(s, TRUE);
 
@@ -558,7 +558,7 @@ static void* rdpdr_server_thread(void* arg)
 	HANDLE events[8];
 	RDPDR_HEADER header;
 	HANDLE ChannelEvent;
-	UINT32 BytesReturned;
+	DWORD BytesReturned;
 	RdpdrServerContext* context;
 
 	context = (RdpdrServerContext*) arg;
@@ -594,7 +594,7 @@ static void* rdpdr_server_thread(void* arg)
 			break;
 		}
 
-		if (WTSVirtualChannelRead(context->priv->ChannelHandle, 0, Stream_Pointer(s),
+		if (WTSVirtualChannelRead(context->priv->ChannelHandle, 0, (PCHAR) Stream_Pointer(s),
 				Stream_Capacity(s) - Stream_GetPosition(s), &BytesReturned))
 		{
 			if (BytesReturned)
diff --git a/channels/rdpsnd/server/rdpsnd_main.c b/channels/rdpsnd/server/rdpsnd_main.c
index d56de7fee..070958088 100644
--- a/channels/rdpsnd/server/rdpsnd_main.c
+++ b/channels/rdpsnd/server/rdpsnd_main.c
@@ -74,7 +74,7 @@ static BOOL rdpsnd_server_send_formats(RdpsndServerContext* context, wStream* s)
 	Stream_SetPosition(s, 2);
 	Stream_Write_UINT16(s, pos - 4);
 	Stream_SetPosition(s, pos);
-	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, Stream_Buffer(s), Stream_GetPosition(s), NULL);
+	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, (PCHAR) Stream_Buffer(s), Stream_GetPosition(s), NULL);
 	Stream_SetPosition(s, 0);
 
 	return status;
@@ -163,7 +163,7 @@ static void* rdpsnd_server_thread(void* arg)
 	UINT16 BodySize;
 	HANDLE events[8];
 	HANDLE ChannelEvent;
-	UINT32 BytesReturned;
+	DWORD BytesReturned;
 	RdpsndServerContext* context;
 
 	context = (RdpsndServerContext*) arg;
@@ -201,7 +201,7 @@ static void* rdpsnd_server_thread(void* arg)
 		Stream_SetPosition(s, 0);
 
 		if (WTSVirtualChannelRead(context->priv->ChannelHandle, 0,
-				Stream_Buffer(s), Stream_Capacity(s), &BytesReturned))
+				(PCHAR) Stream_Buffer(s), Stream_Capacity(s), &BytesReturned))
 		{
 			if (BytesReturned)
 				Stream_Seek(s, BytesReturned);
@@ -214,7 +214,7 @@ static void* rdpsnd_server_thread(void* arg)
 			Stream_EnsureRemainingCapacity(s, BytesReturned);
 
 			if (WTSVirtualChannelRead(context->priv->ChannelHandle, 0,
-					Stream_Buffer(s), Stream_Capacity(s), &BytesReturned) == FALSE)
+					(PCHAR) Stream_Buffer(s), Stream_Capacity(s), &BytesReturned) == FALSE)
 			{
 				break;
 			}
@@ -384,7 +384,7 @@ static BOOL rdpsnd_server_send_audio_pdu(RdpsndServerContext* context)
 	Stream_Seek(s, 3); /* bPad */
 	Stream_Write(s, src, 4);
 
-	WTSVirtualChannelWrite(context->priv->ChannelHandle, Stream_Buffer(s), Stream_GetPosition(s), NULL);
+	WTSVirtualChannelWrite(context->priv->ChannelHandle, (PCHAR) Stream_Buffer(s), Stream_GetPosition(s), NULL);
 	Stream_SetPosition(s, 0);
 
 	/* Wave PDU */
@@ -395,7 +395,7 @@ static BOOL rdpsnd_server_send_audio_pdu(RdpsndServerContext* context)
 	if (fill_size > 0)
 		Stream_Zero(s, fill_size);
 
-	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, Stream_Buffer(s), Stream_GetPosition(s), NULL);
+	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, (PCHAR) Stream_Buffer(s), Stream_GetPosition(s), NULL);
 	Stream_SetPosition(s, 0);
 
 	context->priv->out_pending_frames = 0;
@@ -449,7 +449,7 @@ static BOOL rdpsnd_server_set_volume(RdpsndServerContext* context, int left, int
 	Stream_SetPosition(s, 2);
 	Stream_Write_UINT16(s, pos - 4);
 	Stream_SetPosition(s, pos);
-	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, Stream_Buffer(s), Stream_GetPosition(s), NULL);
+	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, (PCHAR) Stream_Buffer(s), Stream_GetPosition(s), NULL);
 	Stream_SetPosition(s, 0);
 
 	return status;
@@ -480,7 +480,7 @@ static BOOL rdpsnd_server_close(RdpsndServerContext* context)
 	Stream_SetPosition(s, 2);
 	Stream_Write_UINT16(s, pos - 4);
 	Stream_SetPosition(s, pos);
-	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, Stream_Buffer(s), Stream_GetPosition(s), NULL);
+	status = WTSVirtualChannelWrite(context->priv->ChannelHandle, (PCHAR) Stream_Buffer(s), Stream_GetPosition(s), NULL);
 	Stream_SetPosition(s, 0);
 
 	return status;
diff --git a/channels/server/channels.c b/channels/server/channels.c
index a4c9bdc0b..53d474eba 100644
--- a/channels/server/channels.c
+++ b/channels/server/channels.c
@@ -662,11 +662,7 @@ void* WTSVirtualChannelOpenEx(
 	return channel;
 }
 
-BOOL WTSVirtualChannelQuery(
-	/* __in */  void* hChannelHandle,
-	/* __in */  WTS_VIRTUAL_CLASS WtsVirtualClass,
-	/* __out */ void** ppBuffer,
-	/* __out */ UINT32* pBytesReturned)
+BOOL WTSVirtualChannelQuery(HANDLE hChannelHandle, WTS_VIRTUAL_CLASS WtsVirtualClass, PVOID* ppBuffer, DWORD* pBytesReturned)
 {
 	void* pfd;
 	BOOL bval;
@@ -739,18 +735,12 @@ BOOL WTSVirtualChannelQuery(
 	return result;
 }
 
-void WTSFreeMemory(
-	/* __in */ void* pMemory)
+VOID WTSFreeMemory(PVOID pMemory)
 {
 	free(pMemory);
 }
 
-BOOL WTSVirtualChannelRead(
-	/* __in */  void* hChannelHandle,
-	/* __in */  UINT32 TimeOut,
-	/* __out */ BYTE* Buffer,
-	/* __in */  UINT32 BufferSize,
-	/* __out */ UINT32* pBytesRead)
+BOOL WTSVirtualChannelRead(HANDLE hChannelHandle, ULONG TimeOut, PCHAR Buffer, ULONG BufferSize, PULONG pBytesRead)
 {
 	wts_data_item* item;
 	rdpPeerChannel* channel = (rdpPeerChannel*) hChannelHandle;
@@ -784,11 +774,7 @@ BOOL WTSVirtualChannelRead(
 	return TRUE;
 }
 
-BOOL WTSVirtualChannelWrite(
-	/* __in */  void* hChannelHandle,
-	/* __in */  BYTE* Buffer,
-	/* __in */  UINT32 Length,
-	/* __out */ UINT32* pBytesWritten)
+BOOL WTSVirtualChannelWrite(HANDLE hChannelHandle, PCHAR Buffer, ULONG Length, PULONG pBytesWritten)
 {
 	rdpPeerChannel* channel = (rdpPeerChannel*) hChannelHandle;
 	wts_data_item* item;
diff --git a/include/freerdp/channels/wtsvc.h b/include/freerdp/channels/wtsvc.h
index 118cfdaa8..b1191f177 100644
--- a/include/freerdp/channels/wtsvc.h
+++ b/include/freerdp/channels/wtsvc.h
@@ -35,18 +35,27 @@
 #include <freerdp/types.h>
 #include <freerdp/peer.h>
 
-typedef struct WTSVirtualChannelManager WTSVirtualChannelManager;
-
-#define WTS_CHANNEL_OPTION_DYNAMIC 0x00000001
+#include <winpr/winpr.h>
+#include <winpr/wtypes.h>
+//#include <winpr/wtsapi.h>
 
 typedef enum _WTS_VIRTUAL_CLASS
 {
 	WTSVirtualClientData,
 	WTSVirtualFileHandle,
-	WTSVirtualEventHandle,
-	WTSVirtualChannelReady
+	WTSVirtualEventHandle, /* Extended */
+	WTSVirtualChannelReady /* Extended */
 } WTS_VIRTUAL_CLASS;
 
+#define WTS_CHANNEL_OPTION_DYNAMIC			0x00000001
+#define WTS_CHANNEL_OPTION_DYNAMIC_PRI_LOW		0x00000000
+#define WTS_CHANNEL_OPTION_DYNAMIC_PRI_MED		0x00000002
+#define WTS_CHANNEL_OPTION_DYNAMIC_PRI_HIGH		0x00000004
+#define WTS_CHANNEL_OPTION_DYNAMIC_PRI_REAL		0x00000006
+#define WTS_CHANNEL_OPTION_DYNAMIC_NO_COMPRESS		0x00000008
+
+typedef struct WTSVirtualChannelManager WTSVirtualChannelManager;
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -72,6 +81,9 @@ FREERDP_API HANDLE WTSVirtualChannelManagerGetEventHandle(WTSVirtualChannelManag
  * Static virtual channels must be opened from the main thread. Dynamic virtual channels
  * can be opened from any thread.
  */
+
+// WINPR_API HANDLE WTSVirtualChannelOpenEx(DWORD SessionId, LPSTR pVirtualName, DWORD flags);
+
 FREERDP_API void* WTSVirtualChannelOpenEx(
 	/* __in */ WTSVirtualChannelManager* vcm,
 	/* __in */ const char* pVirtualName,
@@ -83,17 +95,14 @@ FREERDP_API void* WTSVirtualChannelOpenEx(
  * Servers use this function to gain access to a virtual channel file handle
  * that can be used for asynchronous I/O.
  */
-FREERDP_API BOOL WTSVirtualChannelQuery(
-	/* __in */  void* hChannelHandle,
-	/* __in */  WTS_VIRTUAL_CLASS WtsVirtualClass,
-	/* __out */ void** ppBuffer,
-	/* __out */ UINT32* pBytesReturned);
+
+WINPR_API BOOL WTSVirtualChannelQuery(HANDLE hChannelHandle, WTS_VIRTUAL_CLASS WtsVirtualClass, PVOID* ppBuffer, DWORD* pBytesReturned);
 
 /**
  * Frees memory allocated by WTSVirtualChannelQuery
  */
-FREERDP_API void WTSFreeMemory(
-	/* __in */ void* pMemory);
+
+WINPR_API VOID WTSFreeMemory(PVOID pMemory);
 
 /**
  * Reads data from the server end of a virtual channel.
@@ -112,25 +121,21 @@ FREERDP_API void WTSFreeMemory(
  * The caller should use the file handle returned by WTSVirtualChannelQuery to
  * determine whether a packet has arrived.
  */
-FREERDP_API BOOL WTSVirtualChannelRead(
-	/* __in */  void* hChannelHandle,
-	/* __in */  UINT32 TimeOut,
-	/* __out */ BYTE* Buffer,
-	/* __in */  UINT32 BufferSize,
-	/* __out */ UINT32* pBytesRead);
+
+WINPR_API BOOL WTSVirtualChannelRead(HANDLE hChannelHandle, ULONG TimeOut, PCHAR Buffer, ULONG BufferSize, PULONG pBytesRead);
 
 /**
  * Writes data to the server end of a virtual channel.
  */
-FREERDP_API BOOL WTSVirtualChannelWrite(
-	/* __in */  void* hChannelHandle,
-	/* __in */  BYTE* Buffer,
-	/* __in */  UINT32 Length,
-	/* __out */ UINT32* pBytesWritten);
+
+WINPR_API BOOL WTSVirtualChannelWrite(HANDLE hChannelHandle, PCHAR Buffer, ULONG Length, PULONG pBytesWritten);
 
 /**
  * Closes an open virtual channel handle.
  */
+
+// WINPR_API BOOL WTSVirtualChannelClose(HANDLE hChannelHandle);
+
 FREERDP_API BOOL WTSVirtualChannelClose(
 	/* __in */ void* hChannelHandle);
 
diff --git a/winpr/include/winpr/wtsapi.h b/winpr/include/winpr/wtsapi.h
index d675255c3..099fc3b2f 100644
--- a/winpr/include/winpr/wtsapi.h
+++ b/winpr/include/winpr/wtsapi.h
@@ -717,7 +717,9 @@ typedef struct _WTSUSERCONFIGW
 typedef enum _WTS_VIRTUAL_CLASS
 {
 	WTSVirtualClientData,
-	WTSVirtualFileHandle
+	WTSVirtualFileHandle,
+	WTSVirtualEventHandle, /* Extended */
+	WTSVirtualChannelReady /* Extended */
 } WTS_VIRTUAL_CLASS;
 
 typedef struct _WTS_SESSION_ADDRESS