Returns some 32-bit integer that is unique for all Layer objects.

Declaration:

IG_PDF_layer_get_unique_id(
        HIG_PDF_LAYER hLayer,
        LPUINT lpnUniqueId
);

Arguments:

Return Value:

A unique identifier of this Layer Object.

Supported Raster Image Formats:

This function does not process image pixels.

Remarks:

It is guaranteed that there cannot be two Layer objects with the same UniqueIds. This can be used for Layer objects' identification.