iPage
Value that represents a page number in a multi-page MRC file. This parameter is used only if the iModify parameter is SAVE_REPLACE or SAVE_INSERT. If iModify is SAVE_REPLACE, iPage represents the number of the page to be replaced (the first page is page 1). If iModify is SAVE_INSERT, iPage represents the number of the page in front of which the new page will be inserted. For example, if iPage is 1 and iModify is SAVE_INSERT, then the page being saved becomes the first page in the file.