EVarUsage TFormer_ProjectVarItGetUsage ( HTFORM  pInstance,
HPROJECTVAR_ITERATOR  hProjectVarIt,
ERRCODE *  peCode 
)

Returns the usage of the DataField specified with the iterator.

Remarks:
A FormLayout utilizes user- or system DataField as place-holders for dynamic data. Values for such DataFields are usually provided by the user (entered manually in TFORMer Designer) or imported from a DataSource. Each DataField can be used on its own, as part of expressions (e.g. in a text- or bar-code element) or it may be computed within the FormLayout itself (e.g. pre- and post-expressions). This method queries the FormLayout and returns an enumeration (see EVarUsage) regarding the use of a specific DataField in the FormLayout.
Returns:
- The usage of the DataField in the current FormLayout. This value is only valid if peCode is ErrOk (0).
Parameters:
[in] pInstance The TFORMer-Instance provided by a previous call to TFormer_Init.
[in] hProjectVarIt DataField iterator (see TFormer_GetFirstProjectVarIt)
[out] peCode Error Code (ErrOk (0) in case of success)
See also:
TFormer_GetFirstProjectVarIt, TFormer_GetNextProjectVarIt


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