Craig,

Thank you so much for the comprehensive list on your blog!

I've saved the list in a header file named gdiplusx.h.

I'm still running into problems with creating TIFF with parameter set:

#include gdiplusx.h 

PUBLIC obmp,og,obrush,ocolor,ofontfamily,ofont,opoint,ostringformat
STORE null TO obmp,og,obrush,ocolor,ofontfamily,ofont,opoint,ostringformat
SET CLASSLIB TO (HOME()+"ffc\_gdiplus.vcx")
obmp = CREATEOBJECT("gpbitmap",SYSMETRIC(1),SYSMETRIC(2),0x0026200A)
og = CREATEOBJECT("gpgraphics")
m.og.CreateFromImage(m.obmp)
ocolor = CREATEOBJECT("gpcolor",200,56,153,255)
obrush = CREATEOBJECT("gpsolidbrush",ocolor)
ofontfamily = CREATEOBJECT("gpfontfamily","Verdana")
ofont = CREATEOBJECT("gpfont",m.ofontfamily,72)
m.opoint = CREATEOBJECT("gppoint",0,0)
m.ostringformat = CREATEOBJECT("gpstringformat",0)
?m.og.DrawStringA("Hello, World!",m.ofont,m.opoint,m.ostringformat,m.obrush)
*!* Save to gif
CLEAR 
?m.obmp.SaveToFile("c:\example.bmp","image/bmp") && Works 
?m.obmp.SaveToFile("c:\example.gif","image/gif") && Works 
?m.obmp.SaveToFile("c:\example.jpeg","image/jpeg") && Works 
?m.obmp.SaveToFile("c:\example.jpg","image/jpeg") && Doesn't Works 
?m.obmp.SaveToFile("c:\example.jpeg","image/jpeg","quality=100") && Works 
?m.obmp.SaveToFile("c:\example.tif","image/tiff") && Works 
?m.obmp.SaveToFile("c:\example1.tif","image/tiff","Compression=3,ColorDepth=1,SaveFlag=18") && Does not work
?m.obmp.SaveToFile("c:\example1.bmp",ImageFormatBMP) && Errors on StringToGUID method
?m.obmp.SaveToFile("c:\example1.gif",ImageFormatGIF) && Errors on StringToGUID method
?m.obmp.SaveToFile("c:\example1.jpg",ImageFormatJPEG,) && Errors on StringToGUID method
?m.obmp.SaveToFile("c:\example1.tif",ImageFormatTIFF,"Compression=3,ColorDepth=1,SaveFlag=18") && Errors on StringToGUID method

Do you see what I'm doing wrong?