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With the kind assistance Auge Ohr I learned about the existence of a single undocumented function Alaska: GraGradient (), which is very useful to me. This raises the question of how many more undocumented functions have in Alaska and what kind of functions. For example, I can not imagine that in a programming language with the graphics subsystem was not the function of reading the pixel values in the image file. Because of what our dear Mahaguru Roger (which we heartily wish you health and success) had to write special feature: GetPixel(). Who can say about it?

Eugene Lutsenko wrote:This raises the question of how many more undocumented functions have in Alaska and what kind of functions.

1.) use a HEX Editor or Dependency Walker*** to "look" into DLL
2.) there are some know "undocumented" Class

XbpColodialog (XppUi2.dll) working
XbpSplitbar (XppUi3.dll) working
XbpNotebook (XppUi3.dll) hm ... no Statusbar
Layoutmanager (XppUi3.dll) working

you can try to create a Object an use o:classDescribe()
Express++ does have Function DC_InspectObject()

Eugene Lutsenko wrote:For example, I can not imagine that in a programming language with the graphics subsystem was not the function of reading the pixel values in the image file. Because of what our dear Mahaguru Roger (which we heartily wish you health and success) had to write special feature: GetPixel(). Who can say about it?

Xbase (all Version) Language are based on Dbase ][ using for Database with ANSI/ASCII Sign.
Windows does have GDI32.DLL which Xbase++ use with GRA Function ... but not all.

if you want to enhance Xbase++ you can use 3-PP LIB or learn how to use Windows DLL with Xbase++ and DllCall() ...

*** http://www.dependencywalker.com/