Know clicked button
i'm making a license key checker in my installer, and it's doing something like :
!insertmacro MUI_INSTALLOPTIONS_READ $R7 "PASSWORD.ini" "Field 5" "State"
!insertmacro MUI_INSTALLOPTIONS_READ $R8 "PASSWORD.ini" "Field 6" "State"
System::Call '$TEMP\KeyCheck.dll::CheckKey(t R7) i .R9'
StrCmp $R8 $R9 continue
MessageBox MB_OK|MB_ICONSTOP "Wrong user name and password, try again"
But I have a problem, i don't want to check the key if the user click on Cancel or on Back button. Because it gives him the messagebox if he clicks on them... Not very cool. So I want only the key to be check if the user clicks on Next button.
I think there's a way to know on which button the user clicks.
Thanks for your help