Sample

CConvertOption option = CPDF_DefaultConvertOption();

option.page_layout_mode = e_PageLayoutModeFlow;
CPDF_StartPDFToWord(CPDF_TEXT("input.pdf"), CPDF_TEXT("password"), CPDF_TEXT("path/flow.docx"), option, NULL);

option.page_layout_mode = e_PageLayoutModeBox;
CPDF_StartPDFToWord(CPDF_TEXT("input.pdf"), CPDF_TEXT("password"), CPDF_TEXT("path/box.docx"), option, NULL);