WTSSendMessageW

function WTSSendMessageW(

  hServer: HANDLE;

  SessionId: DWORD;

  pTitle: LPWSTR;

  TitleLength: DWORD;

  pMessage: LPWSTR;

  MessageLength: DWORD;

  Style: DWORD;

  Timeout: DWORD;

  var pResponse: DWORD;

  bWait: BOOL

):BOOL;