Making a structure with ot4xb

[rdonnay]

I have a customer who needs to add custom forms to printers via code.

Windows has an API call named AddForm() under Printer Spooler functions.

This requires a structure.

I understand that ot4xb has features that are supposed to make it easier to create structures rather than using BAP.
I don't see any examples of this.

Does anyone have a sample?

[Auge_Ohr]

Does anyone have a sample?

i guess you have download Source of ot4xb too.
in \Source\winapi_CommonStructures.cpp you will find a lot of Structure ready to use.
as Attachment Sample EnumPrinters.zip which also show how to write own Structure.

EnumPrinters.zip

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[Tom]

You don't need any source. What you need is a correct description of the structure. Structures in OT4XB are class objects, created this way:

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BEGIN STRUCTURE oMyStructureName
  MEMBER UNIT _FirstPara
  MEMBER HWND _hWnd
  MEMBER BOOL _lWhatever
END STRUCTURE

This code should be at the end of the PRG. The structure object itself is created this way:

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oStruct := oMyStructureName():New()

All elements can be populated after that:

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oStruct:_FirstPara := 15
oStruct:_lWhatever := .T.

If you get a pointer to an existing structure of that kind somewhere, like in a callback, do this:

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FUNCTION MyCallBack(nStructPtr)
LOCAL oStruct := oMyStructureNAme():New():_link_(nStructPtr,.T.)

The last parameter (.T.) means that a copy of the structure is used here.