Response windows request information from the user. They are always opened from within another window (its parent). Typically, a response window is opened after some event occurs in the parent window.
Response windows are application modal. That is, when a response window displays, it is the active window (it has focus) and no other window in the application is accessible until the user responds to the response window. The user can go to other applications, but when the user returns to the application, the response window is still active. Response windows act like modal pop-up windows.
For example, if you want to display a confirmation window when a user tries to close a window with unsaved changes, use a response window. The user is not allowed to proceed until the response window is closed.
PowerBuilder also provides message boxes, which are predefined windows that act like response windows in that they are application modal. You open message boxes using the PowerScript MessageBox function.
For more information, see MessageBox in the PowerScript Reference.