handle initiated MsgBox

Hi,

 

What conditions do i need to set to an initiated MsgBox command so I can close it when something changes via $WM_COMMAND like for instance when WM_DEVICECHANGE sees a different drive (while MsgBox is still showing)

 

so I can close the MsgBox from there ($WM-Function) with auto answering "no" to it

 

I see there is a command like _GUICtrlButton_Click that may be used for this

but I'm guessing I need the MsgBox's win-handle for this to work  or can the win-handle be retrieved as soon as the MsgBox is launched

 

What would be the right way to handle this Msgbox

TIA for any idea's on this