Hello everybody, I'm making a little program where the user must remember numbers (for example 20 numbers between 1 an 100). I've done a first "for" loop to print the 20 numbers to remember. The I make a second "for" loop, where the user must fill in a textbox with his answer for each number he tries. When the user has filled the textbox, he clicks on a "ok" button. My problem is that the sub "buttonok_click" is not the same sub as the sub where is the loop. How can I do in the loop to wait for the ok click without blocking completely the program ? Thank you for your help. Pascal.