I am not sure that this is relevant but here is an extract from the current ClearWin+ enhancements file. It applies to version 7.1 of FTN95 and after.
GET_DIB_SIZE@, GET_DIB_BLOCK@ and IMPORT_IMAGE@ have been extended in order to provide access to a wider range of image files via the Microsoft GDI+ library. This change removes current restrictions on the type of JPEG files that can be accessed and extends the access to image files of other types in addition to the existing access to JPEG and BMP files.
Users can activate the extended features via a prior call to USE_GDIPLUS_IMAGE_FILES@
INTEGER USE_GDIPLUS_IMAGE_FILES@(state)
INTEGER state
A positive value for 'state' enables GDI+ in this context.
A zero value for 'state' disables GDI+ in this context.
The function returns the former 'state' before the call.
The default 'state' is zero (OFF).