End Google Ads 201810 - BS.net 01 --> Hello

If anyone know, how I can send message eg: "Sell Items", to game: Metin2, when game is minimized?
WIW - What I Want:

1. Click "Y"
2. Write "Sell items"
3. Click Enter
4. Click Mouse on position X, Y

I try with Sendmessage, but it work me only on activate ******** When i minimize game, my program don't work. ;(

Please Examples. )

Thanks, and sorry for my english.