Get invoice numbers of selected client in invoice combobox

i have attached a sample file below what i want is when i exit the client combobox of userform1 , my invoice combobox should get populated based on selection in client combobox. ALSO I WAS JUST CURIOUS IF SOMEHOW WE COULD USE TOGGLE BUTTON TO MOVE UP AND DOWN OF INVOICE BOX VALUES (NOT NECESSARILY A TOGGLE BUTTON EVEN ARROW KEY DOWN AND UP WILL DO) AND USE THE INVOICEBOX CHANGE EVENT TO GET THE REST OF VALUES OF THAT PARTICULAR INVOICE Basically i want to filter out invoice numbers of selected client without using filter

the new code is working perfect and almost exactly what I WANTED ..JUST A SMALL AMENDMENT

This method does not exclude duplicates....

CAN WE STILL USE THAT CODE WHICH DOESNT EXCLUDES DUPLICATES (REASON : I HAVE A MASTERSHEET OF ALL MY CLIENTS IN ANOTHER SHEET ,THIS LIST IS SORTED AND IS UNIQUE , WHENEVER I INITIALIZE THIS USERFORM REC1 GETS POPULATED FROM THIS MASTERLIST , BASICALLY I DONT WANT TO DISTURB THE SOURCE OF REC1 WANT TO KEEP IT WITH THE PREVIOUS CODE ITSELF)
IS THIS ACHIEVABLE ? OR DO I HAVE TO EDIT MY DATA ACCORDING TO THIS CODE ITSELF

lol :D not even in my dreams i would ever even think of "shouting" on you genius or anyone on this forum.. i was not aware of it..will keep it in my mind henceforth , thankyou for the code its working like i want to will update you once i compile things here

the code is working like a charm just cant thankyou enough mate !