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CM_Modify_Res_Des_Ex function

The CM_Modify_Res_Des_Ex function modifies a specified resource descriptor on a local or a remote machine.


WINAPI CM_Modify_Res_Des_Ex(
  _Out_     PRES_DES prdResDes,
  _In_      RES_DES rdResDes,
  _In_      RESOURCEID ResourceID,
  _In_      PCVOID ResourceData,
  _In_      ULONG ResourceLen,
  _In_      ULONG ulFlags,
  _In_opt_  HMACHINE hMachine


prdResDes [out]

Pointer to a location to receive a handle to the modified resource descriptor.

rdResDes [in]

Caller-supplied handle to the resource descriptor to be modified. This handle must have been previously obtained by calling one of the following functions:







ResourceID [in]

Caller-supplied resource type identifier. This must be one of the ResType_-prefixed constants defined in Cfgmgr32.h.

ResourceData [in]

Caller-supplied pointer to a resource descriptor, which can be one of the structures listed under the CM_Add_Res_Des_Ex function's description of ResourceData.

ResourceLen [in]

Caller-supplied length of the structure pointed to by ResourceData.

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_Modify_Res_Des_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 caller-supplied resource descriptor data replaces the existing data. The values specified for ResourceID and ResourceLen do not have to match the existing resource descriptor.

If the value specified for ResourceID is ResType_ClassSpecific, then the specified resource descriptor must be the last one associated with the logical configuration.

Callers of CM_Modify_Res_Des_Ex must call CM_Free_Res_Des_Handle to deallocate the resource descriptor handle, after it is no longer needed.

Callers of this function must have SeLoadDriverPrivilege. (Privileges are described in the Microsoft Windows SDK documentation.)

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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