How to return the result of a dialog question in a bash function

I tried to return the result of a question asked from the dialog command. But when I tried that, it freeze and when I press an arrow or enter, it clear the screen, and I just see : numerical argument nessecary. I think it's an error throw by return, but I don't no why? That is not an error from Dialog, because the same command without the return work.

function BUL_askYesNo()
{
        return $(dialog --yesno "$1" 0 0)
}

I tried with KDialog, and it work, so I don't know what is the probleme with Dialog...

When you run dialog in command substitution $(), the stdout is not terminal any more.

You need to pass it to dialog :

#!/usr/bin/env bash
function BUL_askYesNo()
{   
    exec 3>&1
    return $(dialog --yesno "$1" 0 0 2>&1 1>&3)
}
BUL_askYesNo Hello

But return is still not working. I think this is much simpler :

#!/usr/bin/env bash
function BUL_askYesNo()
{   
    dialog --yesno "$1" 0 0
}
BUL_askYesNo Hello