我們已經收到了一些舊版打印機「設置」代碼的應用程序，我們仍在使用PrintDlg。我們使用自定義模板，允許用戶選擇使用哪種打印機進行各種類型的打印任務（例如報告或圖紙）以及方向和紙張尺寸/來源。在Vista x64上使用PrintDlg無法正常工作，在32位和XP上正常工作
它適用於XP和32位Vista，但在Vista x64上它通過CommDlgExtendedError()得到CDERR_MEMLOCKFAILURE。我試過用PRINTDLG結構中的裸機輸入來運行它，但是如果參數包括PD_PRINTSETUP或PD_RETURNDEFAULT，我會得到該錯誤。
由於打印機選擇/頁面設置已拆分爲PageSetupDlg和PrintDlgEx，因此如果不更改相當數量的代碼和/或完全更改我們向用戶提供打印和打印機設置的方式，則不會出現明顯的輕鬆轉換。
有沒有人在64位Vista上看到過這個問題，並且你找到了解決辦法？
注：
應用程序作爲管理員由於其他方面的限制
我發現在微軟論壇相關帖子：On Vista x64, DocumentProperties fails from UAC-elevated process
我與PRINTDLG運行以非管理員工作的一個範例程序驗證。
我發現一個帖子在加快社區論壇：Solution to Printing Problems Vista 64 Quicken 2008，以及相關的常見問題解答：What if I'm unable to print, or receive "Error communicating with printer"?，並使用仿真打印機的建議。
我剛剛遇到了這個問題，因爲我正在向我的應用程序添加打印。我使用的是PrintDialog類，它在編譯爲32位應用程序時效果很好，但在64位模式下編譯時甚至不會彈出。沒有錯誤信息，沒有任何東西。對ShowDialog的調用只是立即返回。 （請注意，我正在運行64位Vista。）
我試過使用PrintDlg，但是它有同樣的問題。我在網上查找，發現很多人都遇到了類似的問題，但顯然不是每個擁有64位Vista的人都會看到這一點。無論如何，我終於決定編寫我自己版本的PrintDialog（從在線借用代碼），但這有點棘手（因爲一些在線代碼存在缺陷），並且因爲我從未在網上找到完整的示例，所以我想我會在這裏發佈我的解決方案。
請注意，我的版本在對話框外留下了一些內容，如「打印範圍」，「副本」和「打印到文件」。這應該很容易添加，但我的應用程序不需要它們。我也無法弄清楚「Type：」字段顯示的是什麼，所以我也把它丟掉了。
這裏的對話框是什麼樣子：
alt text http://www.geocities.com/deancooper2000/PrintDialog64.jpg
這裏是我的代碼（我已經離開了設計師的代碼了，因爲它應該是很容易重新）：
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Printing;
using System.Printing;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using Zemetrics.Diagnostics;
namespace Utils
{
/// <summary>
/// The PrintDialog64 class replaces the standard PrintDialog with one that works in Vista x64
/// </summary>
public partial class PrintDialog64 : Form
{
#region Private members
[DllImport("winspool.drv", EntryPoint="DocumentPropertiesW")]
private static extern int DocumentProperties(IntPtr hWnd,IntPtr hPrinter,[MarshalAs(UnmanagedType.LPWStr)] string pDeviceName,IntPtr pDevMode,IntPtr devModeIn,int fMode);
[DllImport("winspool.drv")] private static extern int OpenPrinter(string pPrinterName,out IntPtr hPrinter,IntPtr pDefault);
[DllImport("winspool.drv")] private static extern int ClosePrinter(IntPtr phPrinter);
[DllImport("kernel32.dll")] private static extern IntPtr GlobalLock(IntPtr hMem);
[DllImport("kernel32.dll")] private static extern int GlobalUnlock(IntPtr hMem);
[DllImport("kernel32.dll")] private static extern int GlobalFree(IntPtr hMem);
private const int DM_PROMPT = 4;
private const int DM_OUT_BUFFER = 2;
private const int DM_IN_BUFFER = 8;
private List<PrinterItem> printers;
private string printerName;
private string originalName;
private IntPtr hDevMode = IntPtr.Zero;
#endregion
/// <summary>
/// Gets or sets the printer that prints the document
/// </summary>
public PrinterSettings PrinterSettings { get; set; }
/// <summary>
/// Gets or sets a value indicating the PrintDocument used to obtain PrinterSettings.
/// </summary>
public PrintDocument Document { get; set; }
/// <summary>
/// Constructs a replacement for the standard PrintDialog with one that works in Vista x64
/// </summary>
public PrintDialog64()
{
InitializeComponent();
}
#region PrinterItem class
/// <summary>
/// The PrinterItem class holds a reference to a PrintQueue and allows us to sort a list based on printer name
/// </summary>
private class PrinterItem : IComparable<PrinterItem>
{
#region Private members
private PrinterItem() {}
#endregion
/// <summary>
/// Construct a PrinterItem by supplying a reference to the printer's PrintQueue class
/// </summary>
///
/// \param[in] printer Reference to PrintQueue class for this printer
public PrinterItem(PrintQueue printer)
{
Printer = printer;
}
/// <summary>
/// Reference to PrintQueue class for this printer
/// </summary>
public PrintQueue Printer { get; set; }
/// <summary>
/// The string for this class is simply the FullName of the printer
/// </summary>
public override string ToString()
{
return Printer.FullName;
}
#region IComparable<PrinterItem> Members
/// <summary>
/// Implements IComparable interface to allow sorting of PrinterItem classes (based on printer name)
/// </summary>
///
/// \param[in] other The other PrinterItem class that we are to compare this one to
public int CompareTo(PrinterItem other)
{
return other.Printer.FullName.CompareTo(this.Printer.FullName);
}
#endregion
}
#endregion
private List<PrinterItem> GetPrinters()
{
List<PrinterItem> printers = new List<PrinterItem>();
EnumeratedPrintQueueTypes[] Queue_types = {EnumeratedPrintQueueTypes.Local,EnumeratedPrintQueueTypes.Connections};
try {
using (LocalPrintServer server = new LocalPrintServer())
foreach (PrintQueue printer in server.GetPrintQueues(Queue_types))
printers.Add(new PrinterItem(printer));
} catch {}
printers.Sort();
return printers;
}
private void PrintDialog64_Shown(object sender, EventArgs e)
{
originalName = Document.PrinterSettings.PrinterName;
printers = GetPrinters();
int index=0, i=0;
foreach(PrinterItem printer in printers) {
nameComboBox.Items.Add(printer.ToString());
if (printer.ToString() == originalName) index = i;
i++;
}
nameComboBox.SelectedIndex = index;
}
private void nameComboBox_Leave(object sender, EventArgs e)
{
string text = nameComboBox.Text;
foreach(Object field in nameComboBox.Items)
if (((string) field).ToLower().StartsWith(text.ToLower())) nameComboBox.SelectedItem = field;
if (nameComboBox.SelectedIndex < 0)
nameComboBox.SelectedIndex = 0;
}
private void nameComboBox_SelectedIndexChanged(object sender, EventArgs e)
{
PrintQueue printer = printers[nameComboBox.SelectedIndex].Printer;
if (hDevMode!=IntPtr.Zero) GlobalFree(hDevMode);
PrinterSettings.PrinterName = printerName = printer.FullName;
hDevMode = PrinterSettings.GetHdevmode(Document.DefaultPageSettings);
statusValue .Text = printer.QueueStatus.ToString()=="None" ? "Ready" : printer.QueueStatus.ToString();
whereValue .Text = printer.Location=="" ? printer.QueuePort.Name : printer.Location;
commentValue.Text = printer.Comment;
}
private void propertiesButton_Click(object sender, EventArgs e)
{
IntPtr handle;
OpenPrinter(printerName, out handle, IntPtr.Zero);
IntPtr pDevMode = GlobalLock(hDevMode);
DocumentProperties(this.Handle, handle, printerName, pDevMode, pDevMode, DM_IN_BUFFER | DM_PROMPT | DM_OUT_BUFFER);
GlobalUnlock(hDevMode);
PrinterSettings.SetHdevmode(hDevMode);
PrinterSettings.DefaultPageSettings.SetHdevmode(hDevMode);
ClosePrinter(handle);
}
private void pageDefaultsButton_Click(object sender, EventArgs e)
{
PageSetupDialog setup = new PageSetupDialog();
setup.PageSettings = Document.DefaultPageSettings;
if (setup.ShowDialog() == DialogResult.OK) {
if (hDevMode!=IntPtr.Zero) GlobalFree(hDevMode);
hDevMode = PrinterSettings.GetHdevmode(Document.DefaultPageSettings = setup.PageSettings);
}
}
private void okButton_Click(object sender, EventArgs e)
{
if (hDevMode!=IntPtr.Zero) GlobalFree(hDevMode);
}
private void cancelButton_Click(object sender, EventArgs e)
{
if (hDevMode!=IntPtr.Zero) GlobalFree(hDevMode);
PrinterSettings.PrinterName = originalName;
}
}
}