how to read Workspace model

Use the url you see in the Browser, afik

wtws://

extern ProError ProFilesList (ProPath directory_path,
ProLine filter,
ProFileListOpt listing_option,
ProPath **p_file_name_array,
ProPath **p_subdir_name_array);
/*
Purpose: Lists the files in the specified directory. You can pass specific
filters to get files with those extensions only.

Input Arguments:

directory_path - The directory in which to look for
the files to be listed. If this is NULL,
the files from the current directory will be
listed.

filter - The user-supplied filter string for file
extensions. Each filter must be separated
by a comma. For example, "*.prt,*.txt"
(converted to a wide-character string).
Each individual element in the filter must
be less than PRO_NAME_SIZE characters.

listing_option - Specifies whether all versions or only the
latest versions are being requested, and whether or
not the list should be sorted alphabetically.

<b>Note: </b>Passing any of _INST options
in Wildfire 4.0 M100 and earlier will have the same
effect as passing PRO_FILE_LIST_LATEST.

Output Arguments:

p_file_name_array - The array of files found. You must preallocate
this array using <b>ProArrayAlloc()</b>; if you
reuse the array, new elements will be appended to
the existing elements unless you reset the array
size to 0 with ProArraySizeSet.

p_subdir_name_array - The array of all subdirectories found,
regardless of whether they match the filter.
You must preallocate this array using
<b>ProArrayAlloc()</b>; if you reuse the array,
new elements will be appended to the existing
elements unless you reset the array size to 0 with
ProArraySizeSet.

Return Values:

PRO_TK_NO_ERROR - The function successfully returned the files.
PRO_TK_BAD_INPUTS - One or more of the input arguments are invalid.
PRO_TK_INVALID_DIR - Invalid directory.

See Also:
ProArrayAlloc()

to read 

extern ProError ProMdlFiletypeLoad (ProPath full_path,
ProMdlfileType type,
ProBoolean ask_user_about_reps,
ProMdl *p_handle);
/*
Purpose: Retrieves the specified model and initializes the handle.
<p>
The function retrieves the model
into memory, but neither displays the model nor
makes it the current model. Differs from ProMdlnameRetrieve
in that the caller can specify the location of the model
in addition to its name.
<p>
If retrieving an assembly, and errors occur in regeneration,
the assembly will include suppressed features. The function
ProSolidRetrievalErrorsGet identifies if errors occurred.

Input Arguments:
full_path - The full path of the model to be retrieved,
including the name, and optionally the location
and extension.
type - The type of the model to retrieve, or PRO_MDLFILE_UNUSED
if full_path includes an extension.
ask_user_about_reps - If TRUE, the Open Rep dialog may be presented,
allowing the user to specify which simplified
representation of the model should be retrieved.

Output Arguments:
p_handle - The handle to the retrieved model