protected static void SetDeviceInfo4(string name, PRINTER_INFO_4 newInfo)
{
IntPtr printerHandle;
PrinterDefaults defaults = new PrinterDefaults {
DesiredAccess = PRINTER_ACCESS.PrinterAllAccess
};
if (!PrintPort.OpenPrinter(name, out printerHandle, ref defaults))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
try
{
IntPtr infoHandle = Marshal.AllocHGlobal(Marshal.SizeOf(newInfo));
Marshal.StructureToPtr(newInfo, infoHandle, false);
try
{
if (!SetPrinter(printerHandle, 4, infoHandle, 0))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
catch { throw; }
finally { Marshal.FreeHGlobal(infoHandle); }
}
catch { throw; }
finally { PrintPort.ClosePrinter(printerHandle); }
}
protected static PRINTER_INFO_4[] enumDeviceInfos4(PRINTER_ENUM_FLAGS flags)
{
uint cbNeeded = 0;
uint cReturned = 0;
if (EnumPrinters(flags, null, 4, IntPtr.Zero, 0, ref cbNeeded, ref cReturned))
{
return(null);
}
int lastWin32Error = Marshal.GetLastWin32Error();
if (lastWin32Error == ERROR_INSUFFICIENT_BUFFER)
{
IntPtr pAddr = Marshal.AllocHGlobal((int)cbNeeded);
if (EnumPrinters(flags, null, 4, pAddr, cbNeeded, ref cbNeeded, ref cReturned))
{
PRINTER_INFO_4[] printerInfo4 = new PRINTER_INFO_4[cReturned];
int offset = pAddr.ToInt32();
Type type = typeof(PRINTER_INFO_4);
int increment = Marshal.SizeOf(type);
for (int i = 0; i < cReturned; i++)
{
printerInfo4[i] = (PRINTER_INFO_4)Marshal.PtrToStructure(new IntPtr(offset), type);
offset += increment;
}
return(printerInfo4);
}
Marshal.FreeHGlobal(pAddr);
lastWin32Error = Marshal.GetLastWin32Error();
}
throw new Win32Exception(lastWin32Error);
}
protected PRINTER_INFO_4 ToInfo4()
{
PRINTER_INFO_4 info = new PRINTER_INFO_4();
info.pPrinterName = Name;
info.pServerName = ServerName;
info.Attributes = Attributes;
return(info);
}
protected static void RenameDevice4(string oldName, string newName)
{
try
{
PRINTER_INFO_4 pi = GetDeviceInfo4(oldName);
pi.pPrinterName = newName;
PrintDevice.SetDeviceInfo4(oldName, pi);
}
catch { throw; }
}
protected virtual void FromInfo4(PRINTER_INFO_4 info)
{
Name = info.pPrinterName;
ServerName = info.pServerName;
Attributes = info.Attributes;
}
