TranslatingDLLsfromC

=ABCs of APIs 11 - <span style="background-color: #ffffff;"> Translating documentation for DLLs in MS "C" into Liberty BASIC </span>= 
//Petermat//
[[toc|flat]]
----
=Introduction= 
I am afraid this note is not by your friendly expert <span style="background-color: #ffffff;">Alyce Watson, but by ignoramus Petermat. Why? Because Alyce did not write this, I needed it, and all I can do is to try to find my way. If I fail maybe someone will be encouraged to pick up and correct the note.</span>
<span style="background-color: #ffffff;">Why is the note necessary? Because Microsoft documents it's API's using C / C++ examples</span>

<span style="font-size: 1.4em;">**The example I am going to use.**</span>
The following LB code is due to "MKnarr" on 
http://libertybasic.conforums.com/index.cgi?board=api&num=1175176417&action=display&start=15
If you run this it will open a window showing a folder tree headed by "My computor". If you select a folder then this will be returned in sPath$<span style="background-color: #ffffff;">Alyce Watson at </span>http://libertybasicuniversity.com/lbnews/nl109/browse.htm.
[[code]]
<span style="font-size: 1.1em;">BIF.RETURNONLYFSDIRS = 1
    MAX.PATH = 260
    STRUCT BrowseInfo,_
    hWndOwner As uLong,_
    pIDLRoot As Long,_
    pszDisplayName As Long,_
    lpszTitle$ As ptr,_
    ulFlags As Long,_
    lpfnCallback As Long,_
    lParam As Long,_
    iImage As Long
    'Set the owner window, optional
    BrowseInfo.hWndOwner.struct = 0
    BrowseInfo.lpszTitle$.struct = text$
    'Return only if the user selected a directory
    BrowseInfo.ulFlags.struct = BIF.RETURNONLYFSDIRS
    'Show the 'Browse for folder dialog
    calldll #shell32, "SHBrowseForFolder",_
    BrowseInfo as struct,_
    lpIDList as long
    If lpIDList>0 Then
        sPath$ = space$(MAX.PATH) + chr$(0)
        'Get the path from the IDList
        calldll #shell32, "SHGetPathFromIDList",lpIDList as long,sPath$ as ptr,r as long
        openstyle="color: darkblue;">open "ole32" for dll as #ole
        'Free
        'free the block of memory
        calldll #ole, "CoTaskMemFree",_
        lpIDList    lpIDList as long,_
        r
            r as long
        close #ole
        iNull = InStr(sPath$, chr$(0))
        If iNull Then sPath$ = Left$(sPath$, iNull - 1)
    End If
    print sPath$

</span>
[[code]]

=Third Part Title= 
Text here.
[[code format="lb"]]
'code hereThe MS definition at https://msdn.microsoft.com/en-us/library/windows/desktop/bb762194(v=vs.85).aspx
[[code]]
<span style="font-family: Consolas,Courier,monospace; font-size: 14px;">BOOL SHGetPathFromIDList(
  _In_  PCIDLIST_ABSOLUTE pidl,
  _Out_ LPTSTR            pszPath
);
</span>
[[code]]
----
[[toc|flat]]This is C++ code. SHGetPathFromIDList is the name of a function - just like LB - and the comma delimited items inside the () are the two function parameters. A C++ function returns a value just like an LB function