Interface Generator - How to use?!

[kawawong]

Hi,

I have used Interface Generator to generate the interface from a dll as follows.

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; Interface generated by Interface Generator 1.0, Date 08/02/2005 

; HbDAO, HB++ Data Access Objects

; Enumerations

Enumeration ; HB_DeleteMode
  #hbRecordDelete = 0
  #hbRecordArchive = 1
  #hbRecordRemove = 2
EndEnumeration

; DispInterfaces

Interface IHB_Recordset Extends IDispatch
  OpenTable(a,b)
  Close()
  AddNew()
  CancelUpdate()
  Delete(a)
  Edit()
  LookupUniqueID(a)
  MoveFirst()
  MoveLast()
  MoveNext()
  MovePrevious()
  Update()
  Blank()
  CreateTable(a,b,c,d,e)
  get_CreateOlePicture(a,b,c,d,e)
  get_CreateHBBitmap(a,b,c,d,e)
  get_AbsolutePosition(a)
  put_AbsolutePosition(a)
  get_BOF(a)
  get_EOF(a)
  get_RecordCount(a)
  get_AppInfoBlock(a)
  put_AppInfoBlock(a,b,c,d)
  get_SortInfoBlock(a)
  put_SortInfoBlock(a,b,c,d)
  get_FieldByIndex(a,b)
  put_FieldByIndex(a,b,c,d,e)
  get_FieldCount(a)
  get_FieldName(a,b)
  get_Field(a,b)
  put_Field(a,b,c,d,e)
EndInterface

Interface IHB_RawDB Extends IDispatch
  OpenTable(a)
  Close()
  AddNew()
  CancelUpdate()
  Delete(a)
  Edit()
  LookupUniqueID(a)
  MoveFirst()
  MoveLast()
  MoveNext()
  MovePrevious()
  Update()
  Blank()
  CreateTable(a,b,c,d)
  Truncate(a)
  get_AbsolutePosition(a)
  put_AbsolutePosition(a)
  get_BOF(a)
  get_EOF(a)
  get_RecordCount(a)
  get_AppInfoBlock(a)
  put_AppInfoBlock(a,b,c,d)
  get_SortInfoBlock(a)
  put_SortInfoBlock(a,b,c,d)
  get_RecordData(a)
  put_RecordData(a,b,c,d)
  get_Int8At(a,b)
  put_Int8At(a,b)
  get_UInt8At(a,b)
  put_UInt8At(a,b)
  get_Int16At(a,b)
  put_Int16At(a,b)
  get_UInt16At(a,b)
  put_UInt16At(a,b)
  get_Int32At(a,b)
  put_Int32At(a,b)
  get_UInt32At(a,b)
  put_UInt32At(a,b)
  get_DoubleAt(a,b)
  put_DoubleAt(a,b)
  get_SingleAt(a,b)
  put_SingleAt(a,b)
  get_DateAt(a,b)
  put_DateAt(a,b,c,d,e)
  get_BooleanAt(a,b)
  put_BooleanAt(a,b)
  get_StringAt(a,b)
  put_StringAt(a,b)
  get_FixedLengthStringAt(a,b,c)
  put_FixedLengthStringAt(a,b,c)
  get_UniqueID(a)
  put_UniqueID(a)
  get_Category(a)
  put_Category(a)
  get_Dirty(a)
  get_Secret(a)
  put_Secret(a)
EndInterface

Now, I want to use IHB_Recordset\OpenTable(a,b) , i.e.

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[VOffset($1C)] HRESULT OpenTable([in] BSTR PdbFile,
     [in] BSTR HbxFile)

and I try

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Global HbDao.IHB_Recordset
result.l = HbDao\OpenTable(PdbFile.s,HbxFile.s)

(PdbFile.s and HbxFile.s are the path and filename I want to pass into it)

and it generates error:

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Bad parameter type, number expected instead of string

Any idea?! Thanks a lot.

[DarkDragon]

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result.l = HbDao\OpenTable(@PdbFile.s,@HbxFile.s)

[traumatic]

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result.l = HbDao\OpenTable(@PdbFile.s,@HbxFile.s)

Guess that won't work, BSTR is widechar so you'll need to convert
the string using MultiByteToWideChar() beforehand.

[DarkDragon]

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result.l = HbDao\OpenTable(@PdbFile.s,@HbxFile.s)

Guess that won't work, BSTR is widechar so you'll need to convert
the string using MultiByteToWideChar() beforehand.

Well, I just combined what's aviable for me:

Bad parameter type, number expected instead of string

And he wants to send a string to the function, so I've choosen that method.

[traumatic]

Yes but he wrote:

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[VOffset($1C)] HRESULT OpenTable([in] BSTR PdbFile,
     [in] BSTR HbxFile) 

[kawawong]

Hi, thanks all.

I use the following function and there is no error now.

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Procedure BSTR(st$) 
   wst = WCHAR(st$) 
   bstr = SysAllocString_(wst) 
   FreeMemory(wst) 
   ProcedureReturn  bstr    
EndProcedure 

Still some problem, but your help is much useful to me. Thanks in advance.