IPrintCorePS2::EnumOptions method enumerates the available options of a specific feature.
HRESULT EnumOptions( PDEVOBJ pdevobj, DWORD dwFlags, PCSTR pszFeatureKeyword, PSTR pmszOptionList, DWORD cbSize, PDWORD pcbNeeded );
Pointer to a DEVOBJ structure.
Is reserved and must be set to zero.
Pointer to a caller-supplied buffer containing an ASCII string, specifying a feature keyword whose options are requested.
Pointer to a caller-supplied buffer that receives a null-delimited list, in MULTI_SZ format, containing the option keywords for the feature keyword pointed to by pszFeatureKeyword. This list is terminated with two null characters.
Set this parameter to NULL to simply query for the size (*pcbNeeded) of the option list without having the list filled in.
Specifies the size, in bytes, of the buffer pointed to by pmszOptionList.
Pointer to a memory location that receives the actual size, in bytes, of the requested data.
This method must return one of the following values.
||The method succeeded.|
The value in cbSize was smaller than the number of bytes to be written to the output buffer (the buffer pointed to by pmszOptionList).
The method was called with pmszOptionList set to NULL.
The string pointed to by pszFeatureKeyword is not a recognized feature.
The pdevobj parameter pointed to an invalid driver context object.
The Pscript5 driver feature is not supported under the current configuration.
The Pscript5 driver feature is supported under the current configuration, but the Pscript5 driver feature's options are not enumerable.
||The method failed.|
To reduce the need to make two calls per data access, pass the method an output buffer of a fixed size (1 KB, for example), and then check the function return value. If the method returns S_OK, the buffer already contains the data of interest. If the method returns E_OUTOFMEMORY, the value in *pcbNeeded is the buffer size needed to hold the data of interest. The caller should then allocate a buffer of that larger size and proceed with a second call to the method.
This method is supported for any Pscript5 render plug-in.
For more information, see Using EnumOptions.
|Header||prcomoem.h (include Prcomoem.h)|