Gecko SDK and clipboard

Clipboard operations using Gecko SDK:

nsCOMPtr<nsIWebBrowser> webBrowser;

...

nsCOMPtr<nsIClipboardCommands> clipCmds = do_GetInterface(webBrowser);
clipCmds->CanCutSelection(&canCutSelection);
clipCmds->CanCopySelection(&canCopySelection);
clipCmds->CanPaste(&canPaste);

...

See code: xulrunner-1.9.1.3-source\mozilla-1.9.1\embedding\tests\winEmbed\winEmbed.cpp, function UpdateUI()