xprop

WM_STATE(WM_STATE):
		window state: Normal
		icon window: 0x0
WM_PROTOCOLS(ATOM): protocols  WM_DELETE_WINDOW
WM_TRANSIENT_FOR(WINDOW): window id # 0x1e0000c
WM_LOCALE_NAME(STRING) = "C"
WM_CLASS(STRING) = "x11-ssh-askpass", "SshAskpass"
WM_HINTS(WM_HINTS):
		Client accepts input or input focus: True
		Initial state is Normal State.
WM_NORMAL_HINTS(WM_SIZE_HINTS):
		program specified location: 0, 0
		program specified size: 0 by 0
		program specified minimum size: 426 by 94
		program specified maximum size: 426 by 94
		program specified base size: 426 by 94
WM_CLIENT_MACHINE(STRING) = "dieter-m6800"
WM_COMMAND(STRING) = { "/usr/lib/ssh/x11-ssh-askpass", "Enter passphrase for /home/dieter/.ssh/id_rsa_dieter-ws-a7n8x-arch: " }
WM_NAME(STRING) = "OpenSSH Authentication Passphrase Request"

xwininfo-all

xwininfo: Please select the window about which you
          would like information by clicking the
          mouse in that window.

xwininfo: Window id: 0x1e0000c "OpenSSH Authentication Passphrase Request"

  Root window id: 0x10c (the root window) "i3"
  Parent window id: 0x6000c5 "[i3 con] container around 0x1c82f30"
     0 children.

  Absolute upper-left X:  922
  Absolute upper-left Y:  513
  Relative upper-left X:  2
  Relative upper-left Y:  0
  Width: 75
  Height: 50
  Depth: 24
  Visual: 0x57
  Visual Class: TrueColor
  Border width: 1
  Class: InputOutput
  Colormap: 0x59 (installed)
  Bit Gravity State: ForgetGravity
  Window Gravity State: NorthWestGravity
  Backing Store State: NotUseful
  Save Under State: no
  Map State: IsViewable
  Override Redirect State: no
  Corners:  +922+513  -921+513  -921-515  +922-515
  -geometry 75x50+920+513

  Bit gravity: ForgetGravity
  Window gravity: NorthWestGravity
  Backing-store hint: NotUseful
  Backing-planes to be preserved: 0xffffffff
  Backing pixel: 0
  Save-unders: No

  Someone wants these events:
      KeyPress
      ButtonPress
      ButtonRelease
      Button1Motion
      Exposure
      StructureNotify
      FocusChange
      PropertyChange
  Do not propagate these events:
  Override redirection?: No

  Window manager hints:
      Client accepts input or input focus: Yes
      Initial state is Normal State
      Process id: (unknown) on host dieter-m6800

  Normal window size hints:
      Program supplied location: 0, 0
      Program supplied size: 0 by 0
      Program supplied minimum size: 426 by 94
      Program supplied maximum size: 426 by 94
      Program supplied base size: 426 by 94
  No zoom window size hints defined

  No window shape defined
  No border shape defined