Add MB_DEFBUTTON* specifies a specific button as the default button, for example:

MessageBox (NULL，"……"，" "，MB _ yes no | MB _ def button 1)；

Then, after pressing Enter, the first button will be selected. Similarly:

MessageBox (NULL，"……"，" "，MB _ yes no | MB _ def button 2)；

After pressing the Enter key, the second button will be selected.

MessageBox can only hold up to 4 buttons.