Merge two TIFF files to one file

VFP show from multi page tiff first page only. If you want extract some page to independently files, you can use class _XFRX_TIFF_WRITER.

This example is for XFRX 21.0.
Parameter tuAppendToFile is equal to parameter tuAppend in SetParams() method.

Append source file to end destination file

LOCAL m.lcSource, m.lcDestination, m.tuAppendToFile, m.loTIFF
m.lcSource="input.tiff"         && Input file
m.lcDestination="output_.tiff"  && Destination file
m.tuAppendToFile=.T.            && Append to end

SET PROCEDURE TO xfrx.prg
m.loTIFF=CREATEOBJECT("_XFRX_TIFF_WRITER")
?m.loTIFF.AppendPages(m.lcSource, m.lcDestination, m.tuAppendToFile)

Append source file begin first page of destination file

LOCAL m.lcSource, m.lcDestination, m.tuAppendToFile, m.loTIFF
m.lcSource="input.tiff"       && Input file
m.lcDestination="output.tiff" && Destination file
m.tuAppendToFile=1            && Append before first page

SET PROCEDURE TO xfrx.prg
m.loTIFF=CREATEOBJECT("_XFRX_TIFF_WRITER")
?m.loTIFF.AppendPages(m.lcSource, m.lcDestination, m.tuAppendToFile)

Replace third page in destination file

LOCAL m.lcSource, m.lcDestination, m.tuAppendToFile, m.loTIFF
m.lcSource="input.tiff"         && Input file
m.lcDestination="output_.tiff"  && Destination file
m.tuAppendToFile="R3"           && Replace third page

SET PROCEDURE TO xfrx.prg
m.loTIFF=CREATEOBJECT("_XFRX_TIFF_WRITER")
?m.loTIFF.AppendPages(m.lcSource, m.lcDestination, m.tuAppendToFile)