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delphi 设置系统默认打印机

作者:admin 来源:未知 日期:2010/5/22 20:20:56 人气: 标签:

unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls,Inifiles,Printers;

type
TForm1 = class(TForm)
ComboBox1: TComboBox;
Button1: TButton;
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
{ tell printer to go to the default by setting
the PrinterIndex value to -1 }
Printer.PrinterIndex := -1;

{ make our combobox non-editable }
ComboBox1.Style := csDropDownList;

{ set our combobox items to the printer printers }
ComboBox1.Items := Printer.Printers;

{ set combobox to view the default printer
according to printer printerindex as set above }
ComboBox1.ItemIndex := Printer.PrinterIndex;

end;

procedure TForm1.Button1Click(Sender: TObject);
var
MyHandle : THandle;
MyDevice,
MyDriver,
MyPort: array [0..255] of Char;
begin
{ set printer to the selected according to the
combobox itemendex }
Printer.PrinterIndex := ComboBox1.ItemIndex;

{ get our printer properties }
Printer.GetPrinter(MyDevice,
MyDriver,
MyPort,
MyHandle);

{ create string of exactly what WriteProfileString()
wants to see by concat each of the above received
character arrays }
StrCat( MyDevice, ',');
StrCat( MyDevice, MyDriver );
StrCat( MyDevice, ',');
StrCat( MyDevice, MyPort );

{ copy our new default printer into our windows ini file
to the [WINDOWS] section under DEVICE= }
WriteProfileString('WINDOWS',
'DEVICE',
MyDevice );

{ tell all applications that the windows ini file has
changed, this will cause them all to recheck default
printer }
SendMessage(HWND_BROADCAST,
WM_WININICHANGE,
0,
LongInt(pChar('windows')));
end;


end.

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