Insert Textbox.text Into Messagebox?

I have two textbox's, these textbox's are used for player1 and player 2 to submit there names, once submitted the players may then click the play button and the game of tic tac toe commences, my problem is, i would like to insert a nifty little winning messagebox displaying the winner as there name in the textbox, for example; player 1s name in the textbox is bob and he is playing as 0's player 2s name in the textbox is john and he is playing as X's

if player 1 wins, at the moment i have a messagebox like this one messagebox.show("well done player 0 you won!")

this works fine so i tried to do what i thought was the simple answer to get my desired outcome which i thought was messagebox.show ("well done you won", TextBox1.Text ) when i do this however, i get an error when i run the program which is "Conversion from string "well done you won" to type 'Integer' is not valid."

i just want it to say "well done you won <player name>"