I have some funds on My Wallet account (Blockchain.info) and I'd like to have a possibility to use them with my bitcoin-qt client. Is there a possibility to do that? Please give short description. I get many "Yes" answears on some forum but still can not do that.
Yes, export the private key(s) of the addresses that have funds on blockchain.info using the settings/advanced section and then import them into the bitcoin-qt software. You will then have full access to the address(es) in both wallets.
in the bitcoin-qt debug console..
Edit: Don't forget change from transactions may not go back into the original address - so once you've made a transaction it may be that you have to repeat the export & import private key process to have the funds available on both wallets.