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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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