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RasEnumDevices info  Overview  Group

The RasEnumDevices function returns the name and type of all available RAS-capable devices.

DWORD RasEnumDevices(

    LPRASDEVINFO lpRasDevInfo,

// buffer to receive information about RAS devices

    LPDWORD lpcb,

// size, in bytes, of the buffer

    LPDWORD lpcDevices

// receives the number of entries written to the buffer



Pointer to a buffer that receives an array of RASDEVINFO structures, one for each RAS-capable device. Before calling the function, set the dwSize member of the first RASDEVINFO structure in the buffer to sizeof(RASDEVINFO) to identify the version of the structure.
Pointer to a variable that contains the size, in bytes, of the lpRasDevInfo buffer. On return, the function sets this variable to the number of bytes required to enumerate the devices.

To determine the required buffer size, call RasEnumDevices with the lpRasDevInfo parameter set to NULL and the variable pointed to by lpcb set to zero. The function returns the required buffer size in the variable pointed to by lpcb.

Pointer to a variable that the function sets to the number of RASDEVINFO structures written to the lpRasDevInfo buffer.

Return Values

If the function succeeds, the return value is zero.

If the function fails, the return value is a nonzero RAS error value or one of following error codes.




The lpRasDevInfo buffer is not large enough. The function returns the required buffer size in the variable pointed to by lpcb.


Indicates insufficient memory.


Indicates an invalid parameter value.


The address or buffer specified by lpRasDevInfo is invalid.

See Also


file: /Techref/os/win/api/win32/func/src/f70_8.htm, 4KB, , updated: 2000/4/7 12:19, local time: 2024/5/27 03:43,

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