CM_Get_Res_Des_Data_Size function (cfgmgr32.h)

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


  [out] PULONG  pulSize,
  [in]  RES_DES rdResDes,
  [in]  ULONG   ulFlags


[out] pulSize

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

[in] rdResDes

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

[in] ulFlags

Not used, must be zero.

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 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). 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.


Requirement Value
Minimum supported client Available in Microsoft Windows 2000 and later versions of Windows.
Target Platform Desktop
Header cfgmgr32.h (include Cfgmgr32.h)
Library Cfgmgr32.lib
DLL Cfgmgr32.dll

See also