Whan drawing bitmap text on screen: 1.How to change from lower left Origin to lower right origin. 2.How to check "X,Y" size of the texte? Thanks.

what method exactly are you using?
when in ortho, change location simply by setting the proper screen coordinate.
change the origin per font, is trickier, dont know bout that. (could simply flip the letters, but i doubt that is what you want)

you should be responsible for setting the dimensions somewhere yourself(in font pixels, or scale in cause of 3d fonts, from which you should be able to distill the sizes)
when you have the sizes, you can calculate your origin per letter, of course, as you want.