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CM_Get_Res_Des_Data_Size_Ex function

The CM_Get_Res_Des_Data_Size_Ex function obtains the buffer size required to hold the information contained in a specified resource descriptor on a local or a remote machine.


WINAPI CM_Get_Res_Des_Data_Size_Ex(
  _Out_     PULONG pulSize,
  _In_      RES_DES rdResDes,
  _In_      ULONG ulFlags,
  _In_opt_  HMACHINE hMachine


pulSize [out]

Caller-supplied address of a location to receive the required buffer size.

rdResDes [in]

Caller-supplied handle to a resource descriptor, obtained by a previous call to CM_Get_Next_Res_Des_Ex.

ulFlags [in]

Not used, must be zero.

hMachine [in, optional]

Caller-supplied machine handle, obtained from a previous call to CM_Connect_Machine.

Note  Using this function to access remote machines is not supported beginning with Windows 8 and Windows Server 2012, as this functionality has been removed.

Return value

If the operation succeeds, the function returns CR_SUCCESS. Otherwise, it returns one of the CR_-prefixed error codes defined in Cfgmgr32.h.

Note  Starting with Windows 8, CM_Get_Res_Des_Data_Size_Ex returns CR_CALL_NOT_IMPLEMENTED when used in a Wow64 scenario. To request information about the hardware resources on a local machine it is necessary implement an architecture-native version of the application using the hardware resource APIs. For example: An AMD64 application for AMD64 systems.


The returned size value represents the size of the appropriate resource structure (see CM_Add_Res_Des_Ex). If the resource descriptor resides in a resource requirements list, the returned size includes both the size of the resource structure and the space allocated for associated range arrays.

Functionality to access remote machines has been removed in Windows 8 and Windows Server 2012 and later operating systems thus you cannot access remote machines when running on these versions of Windows.



Available in Microsoft Windows 2000 and later versions of Windows.


Cfgmgr32.h (include Cfgmgr32.h)



See also




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