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#32: How can I change the default printer in MS Windows?

If you want to change the the default printer in Windows OS, you must change
the device key in the Windows section of the WIN.INI. After that you must
send a WM_WININICHANGE message:

var
  strIni: array[0..MAX_PATH] of Char;
  arrWindows: array[0..64] of Char;
begin
  GetWindowsDirectory(strIni, SizeOf(strIni));
  StrCat(strIni, '\win.ini');
  with TIniFile.Create(strIni) do
    try
      WriteString('windows', 'device', 'HP LaserJet 4 Plus,HPPCL5MS,LPT1:');
    finally
      Free;
    end;

  StrCopy(arrWindows, 'windows');
  SendMessage(HWND_BROADCAST, WM_WININICHANGE, 0, LongInt(@arrWindows));
end;

Published: October 20, 1999

See also

	ABA Picture Convert
	Protected Storage Viewer
	SMMsg suite
	SMReport
	DBISAM Viewer
	SMImport suite
	Paradox Password Recovery
	Fast Document Viewer
	dBase Viewer
	Paradox to MS Access converter

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