Mega Code Archive
Get the printer driver version
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Title: get the printer driver version?
{1.}
uses
Printers, Winspool;
procedure TForm1.FormCreate(Sender: TObject);
begin
ComboBox1.Items.Assign(Printer.Printers);
end;
procedure TForm1.ComboBox1Change(Sender: TObject);
var
hPrinter: THandle;
PrtName: string;
DriverInfo: PDriverInfo2;
dwNeeded: DWORD;
begin
Memo1.Clear;
PrtName := Combobox1.Text;
OpenPrinter(PChar(PrtName), hPrinter, nil);
GetPrinterDriver(hPrinter, nil, 2, DriverInfo, 0, dwNeeded);
GetMem(DriverInfo, dwNeeded);
if GetPrinterDriver(hPrinter, nil, 2, DriverInfo, dwNeeded, dwNeeded) then
begin
// Add infos to Memo1
Memo1.Lines.Add('Version: ' + IntToStr(DriverInfo.cVersion));
Memo1.Lines.Add(StrPas(DriverInfo.pName));
Memo1.Lines.Add(StrPas(DriverInfo.pEnvironment));
Memo1.Lines.Add(StrPas(DriverInfo.pDriverPath));
Memo1.Lines.Add(StrPas(DriverInfo.pDataFile));
Memo1.Lines.Add(StrPas(DriverInfo.pConfigFile));
end
else
Memo1.Lines.Add('No Info needed = ' + IntToStr(dwNeeded));
ClosePrinter(hPrinter);
FreeMem(DriverInfo);
end;
{2.}
{****************************}
{ Another Code by P. Below }
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, WinSpool;
type
TForm1 = class(TForm)
Button1: TButton;
ListBox1: TListBox;
Memo1: TMemo;
procedure Button1Click(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure ListBox1Click(Sender: TObject);
private
{ Private-Deklarationen }
pEnumDriversData: PDriverInfo2;
public
{ Public-Deklarationen }
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.ListBox1Click(Sender: TObject);
var
pTemp: PDriverInfo2;
begin
with Sender as TListbox do
begin
if ItemIndex = 0 then
begin
memo1.Clear;
pTemp := PDriverInfo2(Items.Objects[ItemIndex]);
with memo1.Lines, pTemp^ do
begin
Add(Format('cVersion:'#9#9'%d', [cVersion]));
Add(Format('pName:'#9#9'%s', [pName]));
Add(Format('pEnvironment:'#9'%s', [pEnvironment]));
Add(Format('pDriverPath:'#9'%s', [pDriverPath]));
Add(Format('pDataFile:'#9#9'%s', [pDataFile]));
Add(Format('pConfigFile:'#9'%s', [pConfigFile]));
end;
end;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
var
i, bytesNeeded: DWORD;
pTemp: PDriverInfo2;
NumDrivers: DWORD;
begin
listbox1.Clear;
if Assigned(pEnumDriversData) then
FreeMem(pEnumDriversData);
// get number of installed drivers
Numdrivers := 0;
bytesNeeded := 0;
EnumPrinterDrivers(nil, nil, 2, nil, 0, bytesNeeded, NumDrivers);
if bytesNeeded = 0 then
begin
ShowMessage('No printer drivers installed!');
Exit;
end;
// allocate memory for the driver data
GetMem(pEnumDriversData, bytesNeeded);
// fetch driver data
if EnumPrinterDrivers(nil, nil, 2, pEnumDriversData, bytesNeeded,
bytesNeeded, NumDrivers) then
begin
// add drivers to listbox1
pTemp := pEnumDriversData;
for i := 1 to Numdrivers do
begin
listbox1.Items.AddObject(pTemp^.pName, TObject(pTemp));
Inc(pTemp);
// Note: Inc increments a pointer by the size of its base type!
end;
listbox1.ItemIndex := 0;
listbox1Click(listbox1);
end
else
RaiseLastWin32Error;
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
if Assigned(pEnumDriversData) then
FreeMem(pEnumDriversData);
end;
end.
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