UsbQueryDeviceReport

Obtains the Compound Descriptor of a specific USB device.

Syntax
For access by Device Handle use: ulrc = UsbQueryDeviceReport(Handle,pulBufLen,pucData) For access by Device Number: ulrc = UsbQueryDeviceReport(ulDevNumber,pulBufLen,pucData)

Parameters

 * Handle : the Device Handle received from the previous UsbOpen.
 * ulDevNumber : the Device Number from 1 up to the Total Number from UsbQueryNumberDevices.
 * pulBufLen : the address of the variable to specify/receive the number of bytes.
 * pucData : the address of the buffer to receive the Compound Descriptor.

Return Code
0x0000 - NO_ERROR

0x0057 - ERROR_INVALID_PARAMETER 0x1B58 - USB_NOT_INIT 0xFF13 - ERROR_I24_INVALID_PARAMETER 0xFF1F - ERROR_GEN_FAILURE 0xFF37 - ERROR_DEV_NOT_EXIST 0xFF57 - ERROR_INVALID_PARAMETER 0xFF6F - ERROR_BUFFER_OVERFLOW 0xFFEA - ERROR_MORE_DATA
 * Errors

Remarks
The Compound Descriptor is the concatenation of Device Descriptor and Configuration Descriptor.

Example Code
//Code Snippet - UsbQueryDeviceReport { APIRET ulrc; PUCHAR pucReport; PULONG pulBufLen; UCHAR ucReport[4096]; ULONG ulBufLen = sizeof(ucReport); ULONG ulDevNumber = ulNumDev;

pucReport = &ucReport[0]; pulBufLen = &ulBufLen; ulrc = UsbQueryDeviceReport(ulDevNumber,pulBufLen,pucReport); printf("\nUsbQueryDeviceReport - ulrc: 0x%04X (%hu)",ulrc,ulrc); if (!ulrc) //success {   int i; printf(" - DeviceReport:\n"); for (i=0;i<ulBufLen;i++) printf("%02X",ucReport[i]); } }

Related Functions

 * UsbQueryDeviceInfo
 * UsbQueryNumberDevices
 * UsbOpen