clipboard.settext = text2.textrtf, [rtfformat....don't know by heart...]

if the app, where i paste the text supports rtf then it worx..... but if i want to paste the text to an textbox in the browser then it doesn't work.....
i have to select the text and press ctrl + c instead, to fix that problem.....

but (and that's the clue) why are other programms able to copy the text in a way, that it can be pastet ev'rywhere????????????