/** @file * VBox Remote Desktop Protocol: * Public APIs. */ /* * Copyright (C) 2006-2007 innotek GmbH * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License as published by the Free Software Foundation, * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE * distribution. VirtualBox OSE is distributed in the hope that it will * be useful, but WITHOUT ANY WARRANTY of any kind. * * If you received this file as part of a commercial VirtualBox * distribution, then only the terms of your commercial VirtualBox * license agreement apply instead of the previous paragraph. */ #ifndef __VBox_vrdpapi_h__ #define __VBox_vrdpapi_h__ #include #include #ifdef IN_RING0 # error "There are no VRDP APIs available in Ring-0 Host Context!" #endif #ifdef IN_GC # error "There are no VRDP APIs available Guest Context!" #endif /** @defgroup grp_vrdp VRDP * VirtualBox Remote Desktop Protocol (VRDP) interface that lets to use * the VRDP server. * @{ */ /** Default port that VRDP binds to. */ #define VRDP_DEFAULT_PORT (3389) __BEGIN_DECLS /* Forward declaration of the VRDP server instance handle. */ #ifdef __cplusplus class VRDPServer; typedef class VRDPServer *HVRDPSERVER; #else struct VRDPServer; typedef struct VRDPServer *HVRDPSERVER; #endif /* __cplusplus */ /** * Start server for the specified IConsole. * * @return VBox status code * @param pconsole Pointer to IConsole instance to fetch display, mouse and keyboard interfaces. * @param pvrdpserver Pointer to IVRDPServer instance to fetch configuration. * @param phserver Pointer to server instance handle, * created by the function. */ VRDPR3DECL(int) VRDPStartServer (IConsole *pconsole, IVRDPServer *pvrdpserver, HVRDPSERVER *phserver); /** * Shutdown server. * * @param hserver Handle of VRDP server instance to be stopped. */ VRDPR3DECL(void) VRDPShutdownServer (HVRDPSERVER hserver); /** * Send framebuffer bitmap to client. * * @param hserver Handle of VRDP server instance. * @param x top left horizontal coordinate in framebuffer. * @param y top left vertical coordinate in framebuffer. * @param w width of rectangle. * @param h height of rectangle. */ VRDPR3DECL(void) VRDPSendUpdateBitmap (HVRDPSERVER hserver, unsigned uScreenId, unsigned x, unsigned y, unsigned w, unsigned h); /** * Inform client that display was resized. * New width and height are taken from the current framebuffer. * * @param hserver Handle of VRDP server instance. */ VRDPR3DECL(void) VRDPSendResize (HVRDPSERVER hserver); /** * Send an update in accelerated mode. * * @param hserver Handle of VRDP server instance. * @param pvUpdate The update information. Actually pointer to VBoxGuest.h::VBVACMDHDR structure with extra data. * @param cbUpdate Size of the update data. */ VRDPR3DECL(void) VRDPSendUpdate (HVRDPSERVER hserver, unsigned uScreenId, void *pvUpdate, uint32_t cbUpdate); /** @todo comment the structure. */ typedef struct _VRDPCOLORPOINTER { uint16_t xHot; uint16_t yHot; uint16_t width; uint16_t height; uint16_t masklen; uint16_t datalen; uint32_t vrdpInternal; } VRDPCOLORPOINTER; typedef VRDPCOLORPOINTER *PVRDPCOLORPOINTER; /** * Set mouse pointer shape. * * @param hserver Handle of VRDP server instance. * @param porder The pointer shape information. */ VRDPR3DECL(void) VRDPSendColorPointer (HVRDPSERVER hserver, PVRDPCOLORPOINTER pdata); /** * Hide mouse pointer. * * @param hserver Handle of VRDP server instance. */ VRDPR3DECL(void) VRDPSendHidePointer (HVRDPSERVER hserver); /** Audio format information packed in a 32 bit value. */ typedef uint32_t VRDPAUDIOFORMAT; /** Constructs 32 bit value for given frequency, number of channel and bits per sample. */ #define VRDP_AUDIO_FMT_MAKE(freq, c, bps, s) ((((s) & 0x1) << 28) + (((bps) & 0xFF) << 20) + (((c) & 0xF) << 16) + ((freq) & 0xFFFF)) /** Decode frequency. */ #define VRDP_AUDIO_FMT_SAMPLE_FREQ(a) ((a) & 0xFFFF) /** Decode number of channels. */ #define VRDP_AUDIO_FMT_CHANNELS(a) (((a) >> 16) & 0xF) /** Decode number signess. */ #define VRDP_AUDIO_FMT_SIGNED(a) (((a) >> 28) & 0x1) /** Decode number of bits per sample. */ #define VRDP_AUDIO_FMT_BITS_PER_SAMPLE(a) (((a) >> 20) & 0xFF) /** Decode number of bytes per sample. */ #define VRDP_AUDIO_FMT_BYTES_PER_SAMPLE(a) ((VRDP_AUDIO_FMT_BITS_PER_SAMPLE(a) + 7) / 8) /** * Queues the samples to be sent to client. * * @param hserver Handle of VRDP server instance. * @param pvSamples Address of samples to be sent. * @param cSamples Number of samples. * @param format Encoded audio format for these samples. */ VRDPR3DECL(void) VRDPSendAudioSamples (HVRDPSERVER hserver, void *pvSamples, uint32_t cSamples, VRDPAUDIOFORMAT format); /** * Sets sound volume on client. * * @param hserver Handle of VRDP server instance. * @param left 0..0xFFFF volume level for left channel. * @param right 0..0xFFFF volume level for right channel. */ VRDPR3DECL(void) VRDPSendAudioVolume (HVRDPSERVER hserver, uint16_t left, uint16_t right); /* * Remote USB backend protocol. */ /* The version of Remote USB Protocol. */ #define VRDP_USB_VERSION (1) /** USB backend operations. */ #define VRDP_USB_REQ_OPEN (0) #define VRDP_USB_REQ_CLOSE (1) #define VRDP_USB_REQ_RESET (2) #define VRDP_USB_REQ_SET_CONFIG (3) #define VRDP_USB_REQ_CLAIM_INTERFACE (4) #define VRDP_USB_REQ_RELEASE_INTERFACE (5) #define VRDP_USB_REQ_INTERFACE_SETTING (6) #define VRDP_USB_REQ_QUEUE_URB (7) #define VRDP_USB_REQ_REAP_URB (8) #define VRDP_USB_REQ_CLEAR_HALTED_EP (9) #define VRDP_USB_REQ_CANCEL_URB (10) /** USB service operations. */ #define VRDP_USB_REQ_DEVICE_LIST (11) #define VRDP_USB_REQ_NEGOTIATE (12) /** An operation completion status is a byte. */ typedef uint8_t VRDPUSBSTATUS; /** USB device identifier is an 32 bit value. */ typedef uint32_t VRDPUSBDEVID; /** Status codes. */ #define VRDP_USB_STATUS_SUCCESS ((VRDPUSBSTATUS)0) #define VRDP_USB_STATUS_ACCESS_DENIED ((VRDPUSBSTATUS)1) #define VRDP_USB_STATUS_DEVICE_REMOVED ((VRDPUSBSTATUS)2) /* * Data structures to use with VRDPSendUSBRequest. * The *RET* structures always represent the layout of VRDP data. * The *PARM* structures normally the same as VRDP layout. * However the VRDP_USB_REQ_QUEUE_URB_PARM has a pointer to * URB data in place where actual data will be in VRDP layout. * * Since replies (*RET*) are asynchronous, the 'success' * replies are not required for operations which return * only the status code (VRDPUSBREQRETHDR only): * VRDP_USB_REQ_OPEN * VRDP_USB_REQ_RESET * VRDP_USB_REQ_SET_CONFIG * VRDP_USB_REQ_CLAIM_INTERFACE * VRDP_USB_REQ_RELEASE_INTERFACE * VRDP_USB_REQ_INTERFACE_SETTING * VRDP_USB_REQ_CLEAR_HALTED_EP * */ /* VRDP layout has no aligments. */ #pragma pack(1) /* Common header for all VRDP USB packets. After the reply hdr follows *PARM* or *RET* data. */ typedef struct _VRDPUSBPKTHDR { /* Total length of the reply NOT including the 'length' field. */ uint32_t length; /* The operation code for which the reply was sent by the client. */ uint8_t code; } VRDPUSBPKTHDR; /* Common header for all return structures. */ typedef struct _VRDPUSBREQRETHDR { /* Device status. */ VRDPUSBSTATUS status; /* Device id. */ VRDPUSBDEVID id; } VRDPUSBREQRETHDR; /* VRDP_USB_REQ_OPEN */ typedef struct _VRDP_USB_REQ_OPEN_PARM { uint8_t code; VRDPUSBDEVID id; } VRDP_USB_REQ_OPEN_PARM; typedef struct _VRDP_USB_REQ_OPEN_RET { VRDPUSBREQRETHDR hdr; } VRDP_USB_REQ_OPEN_RET; /* VRDP_USB_REQ_CLOSE */ typedef struct _VRDP_USB_REQ_CLOSE_PARM { uint8_t code; VRDPUSBDEVID id; } VRDP_USB_REQ_CLOSE_PARM; /* The close request has no returned data. */ /* VRDP_USB_REQ_RESET */ typedef struct _VRDP_USB_REQ_RESET_PARM { uint8_t code; VRDPUSBDEVID id; } VRDP_USB_REQ_RESET_PARM; typedef struct _VRDP_USB_REQ_RESET_RET { VRDPUSBREQRETHDR hdr; } VRDP_USB_REQ_RESET_RET; /* VRDP_USB_REQ_SET_CONFIG */ typedef struct _VRDP_USB_REQ_SET_CONFIG_PARM { uint8_t code; VRDPUSBDEVID id; uint8_t configuration; } VRDP_USB_REQ_SET_CONFIG_PARM; typedef struct _VRDP_USB_REQ_SET_CONFIG_RET { VRDPUSBREQRETHDR hdr; } VRDP_USB_REQ_SET_CONFIG_RET; /* VRDP_USB_REQ_CLAIM_INTERFACE */ typedef struct _VRDP_USB_REQ_CLAIM_INTERFACE_PARM { uint8_t code; VRDPUSBDEVID id; uint8_t iface; } VRDP_USB_REQ_CLAIM_INTERFACE_PARM; typedef struct _VRDP_USB_REQ_CLAIM_INTERFACE_RET { VRDPUSBREQRETHDR hdr; } VRDP_USB_REQ_CLAIM_INTERFACE_RET; /* VRDP_USB_REQ_RELEASE_INTERFACE */ typedef struct _VRDP_USB_REQ_RELEASE_INTERFACE_PARM { uint8_t code; VRDPUSBDEVID id; uint8_t iface; } VRDP_USB_REQ_RELEASE_INTERFACE_PARM; typedef struct _VRDP_USB_REQ_RELEASE_INTERFACE_RET { VRDPUSBREQRETHDR hdr; } VRDP_USB_REQ_RELEASE_INTERFACE_RET; /* VRDP_USB_REQ_INTERFACE_SETTING */ typedef struct _VRDP_USB_REQ_INTERFACE_SETTING_PARM { uint8_t code; VRDPUSBDEVID id; uint8_t iface; uint8_t setting; } VRDP_USB_REQ_INTERFACE_SETTING_PARM; typedef struct _VRDP_USB_REQ_INTERFACE_SETTING_RET { VRDPUSBREQRETHDR hdr; } VRDP_USB_REQ_INTERFACE_SETTING_RET; /* VRDP_USB_REQ_QUEUE_URB */ #define VRDP_USB_TRANSFER_TYPE_CTRL (0) #define VRDP_USB_TRANSFER_TYPE_ISOC (1) #define VRDP_USB_TRANSFER_TYPE_BULK (2) #define VRDP_USB_TRANSFER_TYPE_INTR (3) #define VRDP_USB_TRANSFER_TYPE_MSG (4) #define VRDP_USB_DIRECTION_SETUP (0) #define VRDP_USB_DIRECTION_IN (1) #define VRDP_USB_DIRECTION_OUT (2) typedef struct _VRDP_USB_REQ_QUEUE_URB_PARM { uint8_t code; VRDPUSBDEVID id; uint32_t handle; /* Distinguishes that particular URB. Later used in CancelURB and returned by ReapURB */ uint8_t type; uint8_t ep; uint8_t direction; uint32_t urblen; /* Length of the URB. */ uint32_t datalen; /* Length of the data. */ void *data; /* In RDP layout the data follow. */ } VRDP_USB_REQ_QUEUE_URB_PARM; /* The queue URB has no explicit return. The reap URB reply will be * eventually the indirect result. */ /* VRDP_USB_REQ_REAP_URB * Notificationg from server to client that server expects an URB * from any device. * Only sent if negotiated URB return method is polling. * Normally, the client will send URBs back as soon as they are ready. */ typedef struct _VRDP_USB_REQ_REAP_URB_PARM { uint8_t code; } VRDP_USB_REQ_REAP_URB_PARM; #define VRDP_USB_XFER_OK (0) #define VRDP_USB_XFER_STALL (1) #define VRDP_USB_XFER_DNR (2) #define VRDP_USB_XFER_CRC (3) #define VRDP_USB_REAP_FLAG_CONTINUED (0x0) #define VRDP_USB_REAP_FLAG_LAST (0x1) #define VRDP_USB_REAP_VALID_FLAGS (VRDP_USB_REAP_FLAG_LAST) typedef struct _VRDPUSBREQREAPURBBODY { VRDPUSBDEVID id; /* From which device the URB arrives. */ uint8_t flags; /* VRDP_USB_REAP_FLAG_* */ uint8_t error; /* VRDP_USB_XFER_* */ uint32_t handle; /* Handle of returned URB. Not 0. */ uint32_t len; /* Length of data actually transferred. */ /* Data follow. */ } VRDPUSBREQREAPURBBODY; typedef struct _VRDP_USB_REQ_REAP_URB_RET { /* The REAP URB has no header, only completed URBs are returned. */ VRDPUSBREQREAPURBBODY body; /* Another body may follow, depending on flags. */ } VRDP_USB_REQ_REAP_URB_RET; /* VRDP_USB_REQ_CLEAR_HALTED_EP */ typedef struct _VRDP_USB_REQ_CLEAR_HALTED_EP_PARM { uint8_t code; VRDPUSBDEVID id; uint8_t ep; } VRDP_USB_REQ_CLEAR_HALTED_EP_PARM; typedef struct _VRDP_USB_REQ_CLEAR_HALTED_EP_RET { VRDPUSBREQRETHDR hdr; } VRDP_USB_REQ_CLEAR_HALTED_EP_RET; /* VRDP_USB_REQ_CANCEL_URB */ typedef struct _VRDP_USB_REQ_CANCEL_URB_PARM { uint8_t code; VRDPUSBDEVID id; uint32_t handle; } VRDP_USB_REQ_CANCEL_URB_PARM; /* The cancel URB request has no return. */ /* VRDP_USB_REQ_DEVICE_LIST * * Server polls USB devices on client by sending this request * periodically. Client sends back a list of all devices * connected to it. Each device is assigned with an identifier, * that is used to distinguish the particular device. */ typedef struct _VRDP_USB_REQ_DEVICE_LIST_PARM { uint8_t code; } VRDP_USB_REQ_DEVICE_LIST_PARM; /* Data is a list of the following variable length structures. */ typedef struct _VRDPUSBDEVICEDESC { /* Offset of the next structure. 0 if last. */ uint16_t oNext; /* Identifier of the device assigned by client. */ VRDPUSBDEVID id; /** USB version number. */ uint16_t bcdUSB; /** Device class. */ uint8_t bDeviceClass; /** Device subclass. */ uint8_t bDeviceSubClass; /** Device protocol */ uint8_t bDeviceProtocol; /** Vendor ID. */ uint16_t idVendor; /** Product ID. */ uint16_t idProduct; /** Revision, integer part. */ uint16_t bcdRev; /** Manufacturer string. */ uint16_t oManufacturer; /** Product string. */ uint16_t oProduct; /** Serial number string. */ uint16_t oSerialNumber; /** Physical USB port the device is connected to. */ uint16_t idPort; } VRDPUSBDEVICEDESC; typedef struct _VRDP_USB_REQ_DEVICE_LIST_RET { VRDPUSBDEVICEDESC body; /* Other devices may follow. * The list ends with (uint16_t)0, * which means that an empty list consists of 2 zero bytes. */ } VRDP_USB_REQ_DEVICE_LIST_RET; typedef struct _VRDPUSBREQNEGOTIATEPARM { uint8_t code; /* Remote USB Protocol version. */ uint32_t version; } VRDPUSBREQNEGOTIATEPARM; #define VRDP_USB_CAPS_FLAG_ASYNC (0x0) #define VRDP_USB_CAPS_FLAG_POLL (0x1) #define VRDP_USB_CAPS_VALID_FLAGS (VRDP_USB_CAPS_FLAG_POLL) typedef struct _VRDPUSBREQNEGOTIATERET { uint8_t flags; } VRDPUSBREQNEGOTIATERET; #pragma pack() #define VRDP_CLIPBOARD_FORMAT_NULL (0x0) #define VRDP_CLIPBOARD_FORMAT_UNICODE_TEXT (0x1) #define VRDP_CLIPBOARD_FORMAT_BITMAP (0x2) #define VRDP_CLIPBOARD_FORMAT_HTML (0x4) #define VRDP_CLIPBOARD_FUNCTION_FORMAT_ANNOUNCE (0) #define VRDP_CLIPBOARD_FUNCTION_DATA_READ (1) #define VRDP_CLIPBOARD_FUNCTION_DATA_WRITE (2) /** * Called by the host when (VRDP_CLIPBOARD_FUNCTION_*): * - (0) guest announces available clipboard formats; * - (1) guest requests clipboard data; * - (2) guest responds to the client's request for clipboard data. * * @param hserver The VRDP server handle. * @param u32Function The cause of the call. * @param u32Format Bitmask of announced formats or the format of data. * @param pvData Points to: (1) buffer to be filled with clients data; * (2) data from the host. * @param cbData Size of 'pvData' buffer in bytes. * @param pcbActualRead Size of the copied data in bytes. * */ VRDPR3DECL(void) VRDPClipboard (HVRDPSERVER hserver, uint32_t u32Function, uint32_t u32Format, void *pvData, uint32_t cbData, uint32_t *pcbActualRead); /** * Sends a USB request. * * @param hserver Handle of VRDP server instance. * @param u32ClientId An identifier that allows the server to find the corresponding client. * The identifier is always passed by the server as a parameter * of the FNVRDPUSBCALLBACK. Note that the value is the same as * in the VRDPSERVERCALLBACK functions. * @param pvParm Function specific parameters buffer. * @param cbParm Size of the buffer. */ VRDPR3DECL(void) VRDPSendUSBRequest (HVRDPSERVER hserver, uint32_t u32ClientId, void *pvParm, uint32_t cbRarm); /** * Called by the server when a reply is received from a client. * * @param pvCallback Callback specific value returned by VRDPSERVERCALLBACK::pfnInterceptUSB. * @param u32ClientId Identifies the client that sent the reply. * @param u8Code The operation code VRDP_USB_REQ_*. * @param pvRet Points to data received from the client. * @param cbRet Size of the data in bytes. * * @return VBox error code. */ typedef DECLCALLBACK(int) FNVRDPUSBCALLBACK (void *pvCallback, uint32_t u32ClientId, uint8_t u8Code, const void *pvRet, uint32_t cbRet); typedef FNVRDPUSBCALLBACK *PFNVRDPUSBCALLBACK; /** * Called by the server when (VRDP_CLIPBOARD_FUNCTION_*): * - (0) client announces available clipboard formats; * - (1) client requests clipboard data. * * @param pvCallback Callback specific value returned by VRDPSERVERCALLBACK::pfnInterceptClipboard. * @param u32ClientId Identifies the RDP client that sent the reply. * @param u32Function The cause of the callback. * @param u32Format Bitmask of reported formats or the format of received data. * @param pvData Reserved. * @param cbData Reserved. * * @return VBox error code. */ typedef DECLCALLBACK(int) FNVRDPCLIPBOARDCALLBACK (void *pvCallback, uint32_t u32ClientId, uint32_t u32Function, uint32_t u32Format, const void *pvData, uint32_t cbData); typedef FNVRDPCLIPBOARDCALLBACK *PFNVRDPCLIPBOARDCALLBACK; #define VRDP_CLIENT_INTERCEPT_AUDIO (0x1) #define VRDP_CLIENT_INTERCEPT_USB (0x2) #define VRDP_CLIENT_INTERCEPT_CLIPBOARD (0x4) typedef struct _VRDPSERVERCALLBACK { /* A client is logging in. * * @param pvUser The callback specific pointer. * @param u32ClientId An unique client identifier generated by the server. * @param pszUser The username. * @param pszPassword The password. * @param pszDomain The domain. * * @return VBox error code. */ DECLCALLBACKMEMBER(int, pfnClientLogon) (void *pvUser, uint32_t u32ClientId, const char *pszUser, const char *pszPassword, const char *pszDomain); /* The client has connected. * * @param pvUser The callback specific pointer. * @param u32ClientId An unique client identifier generated by the server. */ DECLCALLBACKMEMBER(void, pfnClientConnect) (void *pvUser, uint32_t u32ClientId); /* The client has been disconnected. * * @param pvUser The callback specific pointer. * @param u32ClientId An unique client identifier generated by the server. * @param fu32Intercepted What was intercepted by the client (VRDP_CLIENT_INTERCEPT_*). */ DECLCALLBACKMEMBER(void, pfnClientDisconnect) (void *pvUser, uint32_t u32ClientId, uint32_t fu32Intercepted); /* The client supports audio channel. */ DECLCALLBACKMEMBER(void, pfnInterceptAudio) (void *pvUser, uint32_t u32ClientId); /* The client supports USB channel. */ DECLCALLBACKMEMBER(void, pfnInterceptUSB) (void *pvUser, uint32_t u32ClientId, PFNVRDPUSBCALLBACK *ppfn, void **ppv); /* The client supports clipboard channel. */ DECLCALLBACKMEMBER(void, pfnInterceptClipboard) (void *pvUser, uint32_t u32ClientId, PFNVRDPCLIPBOARDCALLBACK *ppfn, void **ppv); } VRDPSERVERCALLBACK; /** * Set a callback pointers table that will be called by the server in certain situations. * * @param hserver Handle of VRDP server instance. * @param pCallback Pointer to VRDPSERVERCALLBACK structure with function pointers. * @param pvUser An pointer to be passed to the callback functions. */ VRDPR3DECL(void) VRDPSetCallback (HVRDPSERVER hserver, VRDPSERVERCALLBACK *pCallback, void *pvUser); /** Indexes of information values. */ /** Whether a client is connected at the moment. * uint32_t */ #define VRDP_QI_ACTIVE (0) /** How many times a client connected up to current moment. * uint32_t */ #define VRDP_QI_NUMBER_OF_CLIENTS (1) /** When last connection was established. * int64_t time in milliseconds since 1970-01-01 00:00:00 UTC */ #define VRDP_QI_BEGIN_TIME (2) /** When last connection was terminated or current time if connection still active. * int64_t time in milliseconds since 1970-01-01 00:00:00 UTC */ #define VRDP_QI_END_TIME (3) /** How many bytes were sent in last (current) connection. * uint64_t */ #define VRDP_QI_BYTES_SENT (4) /** How many bytes were sent in all connections. * uint64_t */ #define VRDP_QI_BYTES_SENT_TOTAL (5) /** How many bytes were received in last (current) connection. * uint64_t */ #define VRDP_QI_BYTES_RECEIVED (6) /** How many bytes were received in all connections. * uint64_t */ #define VRDP_QI_BYTES_RECEIVED_TOTAL (7) /** Login user name supplied by the client. * UTF8 nul terminated string. */ #define VRDP_QI_USER (8) /** Login domain supplied by the client. * UTF8 nul terminated string. */ #define VRDP_QI_DOMAIN (9) /** The client name supplied by the client. * UTF8 nul terminated string. */ #define VRDP_QI_CLIENT_NAME (10) /** IP address of the client. * UTF8 nul terminated string. */ #define VRDP_QI_CLIENT_IP (11) /** The client software version number. * uint32_t. */ #define VRDP_QI_CLIENT_VERSION (12) /** Public key exchange method used when connection was established. * Values: 0 - RDP4 public key exchange scheme. * 1 - X509 sertificates were sent to client. * uint32_t. */ #define VRDP_QI_ENCRYPTION_STYLE (13) /** * Query various information from the VRDP server. * * @param index VRDP_QI_* identifier of information to be returned. * @param pvBuffer Address of memory buffer to which the information must be written. * @param cbBuffer Size of the memory buffer in bytes. * @param pcbOut Size in bytes of returned information value. * * @remark The caller must check the *pcbOut. 0 there means no information was returned. * A value greater than cbBuffer means that information is too big to fit in the * buffer, in that case no information was placed to the buffer. */ VRDPR3DECL(void) VRDPQueryInfo (HVRDPSERVER hserver, uint32_t index, void *pvBuffer, uint32_t cbBuffer, uint32_t *pcbOut); __END_DECLS /** @} */ #endif /* __VBox_vrdpapi_h__ */