cmd popup message

msg * /time:0 /w Hello there

start "" cmd /c "echo(&echo(&echo              Hello world!     &echo(&pause>nul"

mshta "javascript:alert('message');close()"
mshta.exe vbscript:Execute("msgbox ""message"",0,""title"":close")
mshta "about:<script>alert('Hello, world!');close()</script>"


mshta javascript:alert("Message\n\nMultiple\nLines\ntoo!");close();

or

if 1 == 1 (
   mshta javascript:alert^("1 is equal to 1, amazing."^);close^(^);
)



mshta "javascript:var sh=new ActiveXObject( 'WScript.Shell' ); sh.Popup( 'Message!', 10, 'Title!', 64 );close()"


powershell (New-Object -ComObject Wscript.Shell).Popup("""Operation Completed""",0,"""Done""",0x0)

powershell [Reflection.Assembly]::LoadWithPartialName("""System.Windows.Forms""");[Windows.Forms.MessageBox]::show("""Hello World""", """My PopUp Message Box""")




SOURCE:
https://stackoverflow.com/questions/774175/show-a-popup-message-box-from-a-windows-batch-file