Develop Reference

Windows form application to change wallpaper. But it changes to black

public partial class Form1 : Form
{
public string[] allFiles = new string[10];
[DllImport("user32.dll", CharSet =CharSet.Auto)]
private static extern bool SystemParametersInfo(uint uiAction, uint uiParam, string pvParam, uint fWinIni);
const uint SPI_SETDESKWALLPAPER = 0x14;
const uint SPIF_UPDATEINIFILE = 0x01;
const uint SPIF_SENDWININICHANGE = 0x02;
public Form1()
{
InitializeComponent();
SystemEvents.PowerModeChanged += OnPowerChange;
}
private void OnPowerChange(object sender, PowerModeChangedEventArgs e)
{
switch (e.Mode) {
case PowerModes.Resume:
var result = SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, #"F:\abc", SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);
Console.WriteLine(result);
string wp = GetWPPath();
Console.WriteLine(wp);
break;
case PowerModes.Suspend:
var res = SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, #"F:\abc", SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);
break;
}
}
private static string GetWPPath()
{
RegistryKey wallpaper = Registry.CurrentUser.OpenSubKey("Control Panel\\Desktop", false);
string wp_path = wallpaper.GetValue("WallPaper").ToString();
wallpaper.Close();
return wp_path;
}
I want to change the wallpaper when i resume laptop from sleep or hibernate. I also checked the registry key, it shows the wallpaper as the path I've set but the desktop background is just black. Is there some kind of reg keys that I have to change or something?
Edit: I hardcoded the file as #"F:\abc", that's the problem. Changed it by mentioning the extension too like #"F:\abc.jpg" and it works. Anyways, I'm gonna change it to an input so shouldn't be a problem. Thanks to all of you.

I have tried to do it in console. It works for me. And later you can add your app to windows autoload.
You must add using System.Runtime.InteropServices;
class Program
{
[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern int SystemParametersInfo(int uAction,
int uParam, string lpvParam, int fuWinIni);
private static readonly int MAX_PATH = 260;
private static readonly int SPI_GETDESKWALLPAPER = 0x73;
private static readonly int SPI_SETDESKWALLPAPER = 0x14;
private static readonly int SPIF_UPDATEINIFILE = 0x01;
private static readonly int SPIF_SENDWININICHANGE = 0x02;
static string GetDesktopWallpaper()
{
string wallpaper = new string('\0', MAX_PATH);
SystemParametersInfo(SPI_GETDESKWALLPAPER, (int)wallpaper.Length, wallpaper, 0);
return wallpaper.Substring(0, wallpaper.IndexOf('\0'));
}
static void SetDesktopWallpaper(string filename)
{
SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, filename,
SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);
}
static void Main()
{
Console.WriteLine("Enter name:");
//should be like - C:\img.jpg
SetDesktopWallpaper(Console.ReadLine());
}
}

Keeping numlock off in c#

I would like to use the numlock button for something other than numlock. So basically I would like to turn off numlock when it is pressed and keep it off. I can capture the button press but it still toggles on/off. I want it off, always. Any suggestions?
Not sure WHY anyone would like to know WHY I want this to be done but here is the reason: I have a bluetooth numeric keypad that I want to use to control a machine. Does that justify the question?
After a couple hours of research I came across the following code which did the trick:
using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
class SetNumlockKeyOn
{
[StructLayout(LayoutKind.Sequential)]
public struct INPUT
{
internal int type;
internal short wVk;
internal short wScan;
internal int dwFlags;
internal int time;
internal IntPtr dwExtraInfo;
int dummy1;
int dummy2;
internal int type1;
internal short wVk1;
internal short wScan1;
internal int dwFlags1;
internal int time1;
internal IntPtr dwExtraInfo1;
int dummy3;
int dummy4;
}
[DllImport("user32.dll")]
static extern int SendInput(uint nInputs, IntPtr pInputs, int cbSize);
public static void SetNumlockOn()
{
if (Control.IsKeyLocked(Keys.NumLock)) return;
const int mouseInpSize = 28;//Hardcoded size of the MOUSEINPUT tag !!!
INPUT input = new INPUT();
input.type = 0x01; //INPUT_KEYBOARD
input.wVk = 0x90; //VK_NUMLOCK
input.wScan = 0;
input.dwFlags = 0; //key-down
input.time = 0;
input.dwExtraInfo = IntPtr.Zero;
input.type1 = 0x01;
input.wVk1 = 0x90;
input.wScan1 = 0;
input.dwFlags1 = 2; //key-up
input.time1 = 0;
input.dwExtraInfo1 = IntPtr.Zero;
IntPtr pI = Marshal.AllocHGlobal(mouseInpSize * 2);
Marshal.StructureToPtr(input, pI, false);
int result = SendInput(2, pI, mouseInpSize); //Hardcoded size of the MOUSEINPUT tag !!!
//if (result == 0 || Marshal.GetLastWin32Error() != 0)
// Console.WriteLine(Marshal.GetLastWin32Error());
Marshal.FreeHGlobal(pI);
}
}

Here's an example:
public static class NativeMethods
{
public const byte VK_NUMLOCK = 0x90;
public const uint KEYEVENTF_EXTENDEDKEY = 1;
public const int KEYEVENTF_KEYUP = 0x2;
[DllImport("user32.dll")]
public static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, int dwExtraInfo);
public static void SimulateKeyPress(byte keyCode)
{
keybd_event(VK_NUMLOCK, 0x45, KEYEVENTF_EXTENDEDKEY, 0);
keybd_event(VK_NUMLOCK, 0x45, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
}
}
public partial class Form1 : Form
{
private bool protectKeys; // To protect from inifite keypress chain reactions
public Form1()
{
InitializeComponent();
}
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
if (protectKeys)
return;
if (e.KeyCode == Keys.NumLock &&
!(new Microsoft.VisualBasic.Devices.Keyboard().NumLock))
{
protectKeys = true;
NativeMethods.SimulateKeyPress(NativeMethods.VK_NUMLOCK);
protectKeys = false;
}
}
}

How to set advanced printer settings [duplicate]

We have a project of managing printing documents. At first I wonder why printing options couldn't be set up in single place. For example printer tray selection for first page and for other pages can be done using MS Word automation:
var doc = _applicationObject.Documents.OpenNoRepairDialog(FileName: ref sourceFile, ReadOnly: ref readOnly,
AddToRecentFiles: ref addToRecentFiles,
Visible: ref visible);
doc.PageSetup.FirstPageTray = (WdPaperTray) firstPageTrayCode;
doc.PageSetup.OtherPagesTray = (WdPaperTray) otherPagesTrayCode;
_applicationObject.ActivePrinter = printerPath;
doc.Activate();
_applicationObject.PrintOut(Background: ref backgroundPrint, FileName: sourceFile);
doc.Close(ref saveChanges, ref _missing, ref _missing);
In the code above printer tray is specified as integer because some printers have not standart values for trays (we had this issue with HP - it's tray codes described here). So we first retrieve what trays printer have, using code:
var setting = new PrinterSettings();
setting.PrinterName = myPrinterName;
foreach (PaperSource tray in setting.PaperSources)
{
Console.WriteLine("\t{0}: #{1}", tray.SourceName, tray.RawKind);
}
And this code works with no problems.
But there is no way to specify duplex and staple options here. Duplex can be done, using driver functions OpenPrinter and SetPrinter, like described here and recommended by Microsoft as well in this forum thread.
Staple is completely unclear and if somebody knows by the way how to implement this, please let me know. Using Stapling enum, like in this MSDN article is useless as it requires custom rendering of the document to print.
I described the situation and how parts were implemented. That works fine on our environment: Windows Server 2008 R2, MS Office 2010 x32, Printers HP LaserJet P2055 and Ricoh Nashuatec DSm635. Tested with native and universal PCL6/PCL5e drivers: duplex and tray selection works as expected.
But after deployment the application to client, printers (HP LaserJet 4250 and Ricoh Aficio MP C7501) do printing always from default tray and without duplex. Tried few different drivers with exactly the same result.
In both environments printers are network printers. So to make them apply duplex setting, using printer driver, we needed to install local driver on server and make a local printer, as recommended my Microsoft on this support forum thread.
Though environments and printers used looks very similar, one works while other do not. Any help will be highly appreciated.

In case someone else needs it, I came up with a workaround, based on storing printer settings memory block in a binary file and then restoring it. The idea was described in this blog post, but it didn't work for me when simply copy-pasted (it worked only for some drivers and for some settings while other printing options were ignored).
So I remade it a bit so that now it can support all settings I've tried on any printer (with compatible driver) I've tested. Of course if you use driver of another printer for example it won't work.
The disadvantage of thi approach is of course that you should first set default printer preferences (in Control Panel) to what you need. That isn't always possible of course, but at least in some cases it can help.
So the full source code of a test util which is capable to store printer settings into a file, load this file again into printer and print a document using the specified settings file:
using System;
using System.Collections.Generic;
using System.Drawing.Printing;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using Microsoft.Office.Interop.Word;
namespace PrintAdvancedTest
{
[StructLayout(LayoutKind.Sequential)]
public struct PRINTER_DEFAULTS
{
public int pDatatype;
public int pDevMode;
public int DesiredAccess;
}
[StructLayout(LayoutKind.Sequential)]
public struct PRINTER_INFO_2
{
[MarshalAs(UnmanagedType.LPStr)]
public readonly string pServerName;
[MarshalAs(UnmanagedType.LPStr)]
public readonly string pPrinterName;
[MarshalAs(UnmanagedType.LPStr)]
public readonly string pShareName;
[MarshalAs(UnmanagedType.LPStr)]
public readonly string pPortName;
[MarshalAs(UnmanagedType.LPStr)]
public readonly string pDriverName;
[MarshalAs(UnmanagedType.LPStr)]
public readonly string pComment;
[MarshalAs(UnmanagedType.LPStr)]
public readonly string pLocation;
public IntPtr pDevMode;
[MarshalAs(UnmanagedType.LPStr)]
public readonly string pSepFile;
[MarshalAs(UnmanagedType.LPStr)]
public readonly string pPrintProcessor;
[MarshalAs(UnmanagedType.LPStr)]
public readonly string pDatatype;
[MarshalAs(UnmanagedType.LPStr)]
public readonly string pParameters;
public IntPtr pSecurityDescriptor;
public readonly Int32 Attributes;
public readonly Int32 Priority;
public readonly Int32 DefaultPriority;
public readonly Int32 StartTime;
public readonly Int32 UntilTime;
public readonly Int32 Status;
public readonly Int32 cJobs;
public readonly Int32 AveragePPM;
}
public class PrintSettings
{
private const short CCDEVICENAME = 32;
private const short CCFORMNAME = 32;
//Constants for DEVMODE
// Constants for DocumentProperties
private const int DM_MODIFY = 8;
private const int DM_COPY = 2;
private const int DM_IN_BUFFER = DM_MODIFY;
private const int DM_OUT_BUFFER = DM_COPY;
// const intants for dmOrientation
private const int DMORIENT_PORTRAIT = 1;
private const int DMORIENT_LANDSCAPE = 2;
// const intants for dmPrintQuality
private const int DMRES_DRAFT = (-1);
private const int DMRES_HIGH = (-4);
private const int DMRES_LOW = (-2);
private const int DMRES_MEDIUM = (-3);
// const intants for dmTTOption
private const int DMTT_BITMAP = 1;
private const int DMTT_DOWNLOAD = 2;
private const int DMTT_DOWNLOAD_OUTLINE = 4;
private const int DMTT_SUBDEV = 3;
// const intants for dmColor
private const int DMCOLOR_COLOR = 2;
private const int DMCOLOR_MONOCHROME = 1;
// const intants for dmCollate
private const int DMCOLLATE_FALSE = 0;
private const int DMCOLLATE_TRUE = 1;
// const intants for dmDuplex
private const int DMDUP_HORIZONTAL = 3;
private const int DMDUP_SIMPLEX = 1;
private const int DMDUP_VERTICAL = 2;
//const for security access
private const int PRINTER_ACCESS_ADMINISTER = 0x4;
private const int PRINTER_ACCESS_USE = 0x8;
private const int STANDARD_RIGHTS_REQUIRED = 0xF0000;
private const int PRINTER_ALL_ACCESS =
(STANDARD_RIGHTS_REQUIRED | PRINTER_ACCESS_ADMINISTER
| PRINTER_ACCESS_USE);
/* field selection bits */
private const int DM_ORIENTATION = 0x00000001;
private const int DM_PAPERSIZE = 0x00000002;
private const int DM_PAPERLENGTH = 0x00000004;
private const int DM_PAPERWIDTH = 0x00000008;
private const int DM_SCALE = 0x00000010;
private const int DM_POSITION = 0x00000020;
private const int DM_NUP = 0x00000040;
private const int DM_DISPLAYORIENTATION = 0x00000080;
private const int DM_COPIES = 0x00000100;
private const int DM_DEFAULTSOURCE = 0x00000200;
private const int DM_PRINTQUALITY = 0x00000400;
private const int DM_COLOR = 0x00000800;
private const int DM_DUPLEX = 0x00001000;
private const int DM_YRESOLUTION = 0x00002000;
private const int DM_TTOPTION = 0x00004000;
private const int DM_COLLATE = 0x00008000;
private const int DM_FORMNAME = 0x00010000;
private const int DM_LOGPIXELS = 0x00020000;
private const int DM_BITSPERPEL = 0x00040000;
private const int DM_PELSWIDTH = 0x00080000;
private const int DM_PELSHEIGHT = 0x00100000;
private const int DM_DISPLAYFLAGS = 0x00200000;
private const int DM_DISPLAYFREQUENCY = 0x00400000;
private const int DM_ICMMETHOD = 0x00800000;
private const int DM_ICMINTENT = 0x01000000;
private const int DM_MEDIATYPE = 0x02000000;
private const int DM_DITHERTYPE = 0x04000000;
private const int DM_PANNINGWIDTH = 0x08000000;
private const int DM_PANNINGHEIGHT = 0x10000000;
private const int DM_DISPLAYFIXEDOUTPUT = 0x20000000;
[StructLayout(LayoutKind.Sequential)]
public struct DEVMODE
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCDEVICENAME)]
public string dmDeviceName;
public short dmSpecVersion;
public short dmDriverVersion;
public short dmSize;
public short dmDriverExtra;
public int dmFields;
public short dmOrientation;
public short dmPaperSize;
public short dmPaperLength;
public short dmPaperWidth;
public short dmScale;
public short dmCopies;
public short dmDefaultSource;
public short dmPrintQuality;
public short dmColor;
public short dmDuplex;
public short dmYResolution;
public short dmTTOption;
public short dmCollate;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCFORMNAME)]
public string dmFormName;
public short dmUnusedPadding;
public short dmBitsPerPel;
public int dmPelsWidth;
public int dmPelsHeight;
public int dmDisplayFlags;
public int dmDisplayFrequency;
}
static void Main(string[] args)
{
Dictionary<string, Action> commands = new Dictionary<string, Action>
{
{"save", PrinterPreferencesSave},
{"print", PrinterPreferencesPrint},
{"set", PrinterPreferencesSet},
{"info", PrinterInfo}
};
while (true)
{
Console.Write("Command ({0}): ", string.Join(", ", commands.Keys));
string command = Console.ReadLine();
Action action;
if (!commands.TryGetValue(command, out action))
{
Console.WriteLine("Invalid command");
}
else
{
action();
}
}
}
static void PrinterPreferencesSave()
{
Console.Write("Printer name: ");
string printerName = Console.ReadLine();
Console.Write("Settings file path format: ");
string SettingsFileNameFormat = Console.ReadLine();
string testName;
while (true)
{
Console.Write("SAVE: Settings set name: ");
testName = Console.ReadLine();
if (testName == "end")
{
break;
}
getDevMode(printerName, string.Format(SettingsFileNameFormat, testName));
}
}
static void PrinterPreferencesPrint()
{
Console.Write("Printer name: ");
string printerName = Console.ReadLine();
Console.Write("Settings file path format: ");
string SettingsFileNameFormat = Console.ReadLine();
Console.Write("Document to print: ");
string docToPrintPath = Console.ReadLine();
string testName;
while (true)
{
Console.Write("PRINT: Settings set name: ");
testName = Console.ReadLine();
if (testName == "end")
{
break;
}
string filePath = string.Format(SettingsFileNameFormat, testName);
if (!File.Exists(filePath))
{
Console.WriteLine("File {0} not exists", filePath);
return;
}
var success = setDevMode(printerName, filePath);
if (success)
{
PrintWordDocument(docToPrintPath, printerName);
}
}
}
static void PrinterPreferencesSet()
{
Console.Write("Printer name: ");
string printerName = Console.ReadLine();
Console.Write("Settings file path format: ");
string SettingsFileNameFormat = Console.ReadLine();
string testName;
while (true)
{
Console.Write("SET: Settings set name: ");
testName = Console.ReadLine();
if (testName == "end")
{
break;
}
string filePath = string.Format(SettingsFileNameFormat, testName);
if (!File.Exists(filePath))
{
Console.WriteLine("File {0} not exists", filePath);
return;
}
var success = setDevMode(printerName, filePath);
if(!success)
{
Console.WriteLine("Failed");
}
}
}
private static void PrinterInfo()
{
Console.Write("Printer name: ");
string printerName = Console.ReadLine();
IntPtr hDevMode; // handle to the DEVMODE
IntPtr pDevMode; // pointer to the DEVMODE
DEVMODE devMode; // the actual DEVMODE structure
//var printController = new StandardPrintController();
PrinterSettings printerSettings = new PrinterSettings();
printerSettings.PrinterName = printerName;
// Get a handle to a DEVMODE for the default printer settings
hDevMode = printerSettings.GetHdevmode(printerSettings.DefaultPageSettings);
// Obtain a lock on the handle and get an actual pointer so Windows won't
// move it around while we're futzing with it
pDevMode = GlobalLock(hDevMode);
// Marshal the memory at that pointer into our P/Invoke version of DEVMODE
devMode = (DEVMODE)Marshal.PtrToStructure(pDevMode, typeof(DEVMODE));
Dictionary<string, int> dmConstants = new Dictionary<string, int>
{
{"DM_ORIENTATION", 0x00000001},
{"DM_PAPERSIZE", 0x00000002},
{"DM_PAPERLENGTH", 0x00000004},
{"DM_PAPERWIDTH", 0x00000008},
{"DM_SCALE", 0x00000010},
{"DM_POSITION", 0x00000020},
{"DM_NUP", 0x00000040},
{"DM_DISPLAYORIENTATION", 0x00000080},
{"DM_COPIES", 0x00000100},
{"DM_DEFAULTSOURCE", 0x00000200},
{"DM_PRINTQUALITY", 0x00000400},
{"DM_COLOR", 0x00000800},
{"DM_DUPLEX", 0x00001000},
{"DM_YRESOLUTION", 0x00002000},
{"DM_TTOPTION", 0x00004000},
{"DM_COLLATE", 0x00008000},
{"DM_FORMNAME", 0x00010000},
{"DM_LOGPIXELS", 0x00020000},
{"DM_BITSPERPEL", 0x00040000},
{"DM_PELSWIDTH", 0x00080000},
{"DM_PELSHEIGHT", 0x00100000},
{"DM_DISPLAYFLAGS", 0x00200000},
{"DM_DISPLAYFREQUENCY", 0x00400000},
{"DM_ICMMETHOD", 0x00800000},
{"DM_ICMINTENT", 0x01000000},
{"DM_MEDIATYPE", 0x02000000},
{"DM_DITHERTYPE", 0x04000000},
{"DM_PANNINGWIDTH", 0x08000000},
{"DM_PANNINGHEIGHT", 0x10000000},
{"DM_DISPLAYFIXEDOUTPUT", 0x20000000},
};
Console.WriteLine("Allow set: {0}. Details: {1}", Convert.ToString(devMode.dmFields, 16), string.Join(",", dmConstants.Where(c=>(devMode.dmFields & c.Value)==c.Value).Select(c=>c.Key)));
//private const int DM_POSITION = 0x00000020;
//private const int DM_NUP = 0x00000040;
//private const int DM_DISPLAYORIENTATION = 0x00000080;
//private const int DM_DEFAULTSOURCE = 0x00000200;
//private const int DM_PRINTQUALITY = 0x00000400;
//private const int DM_COLOR = 0x00000800;
//private const int DM_YRESOLUTION = 0x00002000;
//private const int DM_TTOPTION = 0x00004000;
//private const int DM_FORMNAME = 0x00010000;
//private const int DM_LOGPIXELS = 0x00020000;
//private const int DM_BITSPERPEL = 0x00040000;
//private const int DM_PELSWIDTH = 0x00080000;
//private const int DM_PELSHEIGHT = 0x00100000;
//private const int DM_DISPLAYFLAGS = 0x00200000;
//private const int DM_DISPLAYFREQUENCY = 0x00400000;
//private const int DM_ICMMETHOD = 0x00800000;
//private const int DM_ICMINTENT = 0x01000000;
//private const int DM_MEDIATYPE = 0x02000000;
//private const int DM_DITHERTYPE = 0x04000000;
//private const int DM_PANNINGWIDTH = 0x08000000;
//private const int DM_PANNINGHEIGHT = 0x10000000;
//private const int DM_DISPLAYFIXEDOUTPUT = 0x20000000;
WriteDevModePropertyInfo("DeviceName", devMode.dmDeviceName, null);
WriteDevModePropertyInfo("SpecVersion", devMode.dmSpecVersion.ToString(), null);
WriteDevModePropertyInfo("DriverVersion", devMode.dmDriverVersion.ToString(), null);
WriteDevModePropertyInfo("Size", devMode.dmSize.ToString(), null);
WriteDevModePropertyInfo("DriverExtra", devMode.dmDriverExtra.ToString(), null);
WriteDevModePropertyInfo("Orientation", devMode.dmOrientation.ToString(), (devMode.dmFields & DM_ORIENTATION) == DM_ORIENTATION);
WriteDevModePropertyInfo("PaperSize", devMode.dmPaperSize.ToString(), (devMode.dmFields & DM_PAPERSIZE) == DM_PAPERSIZE);
WriteDevModePropertyInfo("PaperLength", devMode.dmPaperLength.ToString(), (devMode.dmFields & DM_PAPERLENGTH) == DM_PAPERLENGTH);
WriteDevModePropertyInfo("PaperWidth", devMode.dmPaperWidth.ToString(), (devMode.dmFields & DM_PAPERWIDTH) == DM_PAPERWIDTH);
WriteDevModePropertyInfo("Scale", devMode.dmScale.ToString(), (devMode.dmFields & DM_SCALE) == DM_SCALE);
WriteDevModePropertyInfo("Copies", devMode.dmCopies.ToString(), (devMode.dmFields & DM_COPIES) == DM_COPIES);
WriteDevModePropertyInfo("Duplex", devMode.dmDuplex.ToString(), (devMode.dmFields & DM_DUPLEX) == DM_DUPLEX);
WriteDevModePropertyInfo("YResolution", devMode.dmYResolution.ToString(), null);
WriteDevModePropertyInfo("TTOption", devMode.dmTTOption.ToString(), null);
WriteDevModePropertyInfo("Collate", devMode.dmCollate.ToString(), (devMode.dmFields & DM_COLLATE) == DM_COLLATE);
WriteDevModePropertyInfo("FormName", devMode.dmFormName.ToString(), null);
WriteDevModePropertyInfo("UnusedPadding", devMode.dmUnusedPadding.ToString(), null);
WriteDevModePropertyInfo("BitsPerPel", devMode.dmBitsPerPel.ToString(), null);
WriteDevModePropertyInfo("PelsWidth", devMode.dmPelsWidth.ToString(), null);
WriteDevModePropertyInfo("PelsHeight", devMode.dmPelsHeight.ToString(), null);
WriteDevModePropertyInfo("DisplayFlags", devMode.dmDisplayFlags.ToString(), null);
WriteDevModePropertyInfo("DisplayFrequency", devMode.dmDisplayFlags.ToString(), null);
}
private static void WriteDevModePropertyInfo(string settingName, string value, bool? allowSet)
{
Console.WriteLine("{0} {1} {2}", allowSet.HasValue ? (allowSet.Value ? "+" : "-") : " ", settingName.PadRight(20, '.'), value);
}
[DllImport("kernel32.dll", ExactSpelling = true)]
public static extern IntPtr GlobalFree(IntPtr handle);
[DllImport("kernel32.dll", ExactSpelling = true)]
public static extern IntPtr GlobalLock(IntPtr handle);
[DllImport("kernel32.dll", ExactSpelling = true)]
public static extern IntPtr GlobalUnlock(IntPtr handle);
[DllImport("kernel32.dll", EntryPoint = "GetLastError", SetLastError = false,
ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
private static extern Int32 GetLastError();
[DllImport("winspool.Drv", EntryPoint = "ClosePrinter", SetLastError = true,
ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
private static extern bool ClosePrinter(IntPtr hPrinter);
[DllImport("winspool.Drv", EntryPoint = "DocumentPropertiesA", SetLastError = true,
ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
private static extern int DocumentProperties(IntPtr hwnd, IntPtr hPrinter,
[MarshalAs(UnmanagedType.LPStr)] string pDeviceNameg,
IntPtr pDevModeOutput, ref IntPtr pDevModeInput, int fMode);
[DllImport("winspool.Drv", EntryPoint = "GetPrinterA", SetLastError = true,
CharSet = CharSet.Ansi, ExactSpelling = true,
CallingConvention = CallingConvention.StdCall)]
private static extern bool GetPrinter(IntPtr hPrinter, Int32 dwLevel,
IntPtr pPrinter, Int32 dwBuf, out Int32 dwNeeded);
[DllImport("winspool.Drv", EntryPoint = "OpenPrinterA",
SetLastError = true, CharSet = CharSet.Ansi,
ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
private static extern bool
OpenPrinter([MarshalAs(UnmanagedType.LPStr)] string szPrinter,
out IntPtr hPrinter, ref PRINTER_DEFAULTS pd);
[DllImport("winspool.drv", CharSet = CharSet.Ansi, SetLastError = true)]
private static extern bool SetPrinter(IntPtr hPrinter, int Level, IntPtr
pPrinter, int Command);
[DllImport("kernel32.dll")]
static extern IntPtr GlobalAlloc(uint uFlags, int dwBytes);
public static void getDevMode(string printerName, string filepath)
{
PRINTER_DEFAULTS PrinterValues = new PRINTER_DEFAULTS();
PrinterValues.pDatatype = 0;
PrinterValues.pDevMode = 0;
PrinterValues.DesiredAccess = PRINTER_ALL_ACCESS;
IntPtr ptrZero = IntPtr.Zero;
IntPtr hPrinter;
IntPtr pDevMode = new IntPtr();
//get printer handle
OpenPrinter(printerName, out hPrinter, ref PrinterValues);
//allocate memory for ptr to devmode, 0 argument retrieves bytes required
int bytes = DocumentProperties(new IntPtr(0), hPrinter, printerName, ptrZero, ref pDevMode, 0);
pDevMode = GlobalAlloc(0, bytes);
//set the pointer
DocumentProperties(new IntPtr(0), hPrinter, printerName, pDevMode, ref ptrZero, DM_OUT_BUFFER);
//write the devMode to a file
using (FileStream fs = new FileStream(filepath, FileMode.Create))
{
for (int i = 0; i < bytes; i++)
{
fs.WriteByte(Marshal.ReadByte(pDevMode, i));
}
}
//free resources
GlobalFree(pDevMode);
ClosePrinter(hPrinter);
}
public static bool setDevMode(string printerName, string filepath)
{
if(!File.Exists(filepath))
{
return false;
}
IntPtr hPrinter;
int bytes = 0;
IntPtr pPInfo;
IntPtr pDevMode;
PRINTER_INFO_2 pInfo = new PRINTER_INFO_2();
PRINTER_DEFAULTS PrinterValues = new PRINTER_DEFAULTS();
PrinterValues.pDatatype = 0;
PrinterValues.pDevMode = 0;
PrinterValues.DesiredAccess = PRINTER_ALL_ACCESS;
//retrieve the devmode from file
using (FileStream fs = new FileStream(filepath, FileMode.Open))
{
int length = Convert.ToInt32(fs.Length);
pDevMode = GlobalAlloc(0, length);
for (int i = 0; i < length; i++)
{
Marshal.WriteByte(pDevMode, i, (byte)fs.ReadByte());
}
}
//get printer handle
OpenPrinter(printerName, out hPrinter, ref PrinterValues);
//get bytes for printer info structure and allocate memory
GetPrinter(hPrinter, 2, IntPtr.Zero, 0, out bytes);
if (bytes == 0)
{
throw new Exception("Get Printer Failed");
}
pPInfo = GlobalAlloc(0, bytes);
//set pointer to printer info
GetPrinter(hPrinter, 2, pPInfo, bytes, out bytes);
//place the printer info structure
pInfo = (PRINTER_INFO_2)Marshal.PtrToStructure(pPInfo, typeof(PRINTER_INFO_2));
//insert the new devmode
pInfo.pDevMode = pDevMode;
pInfo.pSecurityDescriptor = IntPtr.Zero;
//set pointer to new printer info
Marshal.StructureToPtr(pInfo, pPInfo, true);
//update
SetPrinter(hPrinter, 2, pPInfo, 0);
//free resources
GlobalFree(pPInfo);
GlobalFree(pDevMode);
ClosePrinter(hPrinter);
return true;
}
private static void PrintWordDocument(string path, string printerName)
{
object readOnly = true;
object addToRecentFiles = false;
object visible = false;
object backgroundPrint = false;
object saveChanges = false;
object sourceFile = path;
var wordApplication = new Application();
var doc = wordApplication.Documents.OpenNoRepairDialog(FileName: ref sourceFile, ReadOnly: ref readOnly,
AddToRecentFiles: ref addToRecentFiles,
Visible: ref visible);
wordApplication.ActivePrinter = printerName;
doc.Activate();
wordApplication.PrintOut(Background: ref backgroundPrint, FileName: sourceFile);
object _missing = Type.Missing;
doc.Close(ref saveChanges, ref _missing, ref _missing);
}
}
}
UPDATE 2018-12-04 (in 5,5 years): There was a nasty rare problem with Marshal.StructureToPtr call in this code and today I finally got an answer to that question (see comment from Hans Passant). I'm not able to verify if that actually works since I no longer work on that project, but it seems you may need to apply that fix if you try using this code.

delete executing file on windows ce

i want to make a uninstaller on windows ce.
The Problem is I want to delete the uninstaller itself after executed everything else.
Is this possible somehow? Or is there someway to make a unistaller in another way?

You can just have the app move itself to the recycle bin. It's a pain because you have to P/Invoke to do this with an unintuative structure. This swatch should help with that.
private bool Recycle(string path)
{
try
{
ShowProgress(string.Format("Moving {0} to Recycle bin.", path));
SHFILEOPSTRUCT sfo = new SHFILEOPSTRUCT();
sfo.hwnd = IntPtr.Zero;
sfo.wFunc = FO_DELETE;
sfo.fFlags = FOF_ALLOWUNDO | FOF_NOCONFIRMATION;
sfo.pFrom = path +'\0' + '\0';
sfo.pTo = null;
sfo.fAnyOperationsAborted = false;
sfo.hNameMappings = IntPtr.Zero;
sfo.lpszProgressTitle = string.Empty;
int ret = SHFileOperation(ref sfo);
return (ret == 0);
}
catch (Exception ex)
{
ShowProgress(string.Format("Failed to move {0} to Recycle bin.", path));
ShowProgress(ex.ToString());
}
return false;
}
// SHFileOperation wFunc and wFunc values
public const uint FO_MOVE = 0x0001;
public const uint FO_COPY = 0x0002;
public const uint FO_DELETE = 0x0003;
public const uint FO_RENAME = 0x0004;
public const ushort FOF_MULTIDESTFILES = 0x0001;
public const ushort FOF_CONFIRMMOUSE = 0x0002;
public const ushort FOF_SILENT = 0x0004; // don't create progress/report
public const ushort FOF_RENAMEONCOLLISION = 0x0008;
public const ushort FOF_NOCONFIRMATION = 0x0010; // Don't prompt the user.
public const ushort FOF_WANTMAPPINGHANDLE = 0x0020;// Fill in SHFILEOPSTRUCT.hNameMappings
// Must be freed using SHFreeNameMappings
public const ushort FOF_ALLOWUNDO = 0x0040;
public const ushort FOF_FILESONLY = 0x0080; // on *.*, do only files
public const ushort FOF_SIMPLEPROGRESS = 0x0100; // means don't show names of files
public const ushort FOF_NOCONFIRMMKDIR = 0x0200; // don't confirm making any needed dirs
public const ushort FOF_NOERRORUI = 0x0400; // don't put up error UI
public const ushort FOF_NOCOPYSECURITYATTRIBS = 0x0800; // dont copy NT file Security Attributes
public const ushort FOF_NORECURSION = 0x1000; // don't recurse ushorto directories.
//[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]
//If you use the above you may encounter an invalid memory access exception (when using ANSI
//or see nothing (when using unicode) when you use FOF_SIMPLEPROGRESS flag.
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct SHFILEOPSTRUCT
{
public IntPtr hwnd;
public uint wFunc;
[MarshalAs(UnmanagedType.LPWStr)]
public string pFrom;
[MarshalAs(UnmanagedType.LPWStr)]
public string pTo;
public ushort fFlags;
[MarshalAs(UnmanagedType.Bool)]
public bool fAnyOperationsAborted;
public IntPtr hNameMappings;
[MarshalAs(UnmanagedType.LPWStr)]
public string lpszProgressTitle;
}
[DllImport("ceshell.dll")]
public static extern int SHFileOperation([In] ref SHFILEOPSTRUCT lpFileOp);

killer.cmd:
:a
del uninstaller.exe
if exist uninstaller.exe goto a
del killer.cmd
Start it before exitting your uninstaller, so uninstaller.exe will be removed as soon as it's possible, and then killer.cmd is also removed.
// Though, not sure if there are .cmds in CE.

Scrollbar flicker when calling EnableScrollBar

I'm using p/invoke to call EnableScrollBar from user32.dll (MSDN reference). I noticed that when the scrollbar is enabled, it seems to draw as though no theme is applied and then re-drawn with the theme applied. I've only tested with Windows 7 so far. Is there
any way to stop this from happening?
EDIT: Here's some code to show what happens (dump into a form with scrollbars):
private class Native
{
[DllImport("user32.dll")]
public static extern bool EnableScrollBar(IntPtr hWnd, uint wSBflags, uint wArrows);
public static class SBArrows
{
public const uint ESB_ENABLE_BOTH = 0;
public const uint ESB_DISABLE_BOTH = 3;
public const uint ESB_DISABLE_LEFT = 1;
public const uint ESB_DISABLE_RIGHT = 2;
public const uint ESB_DISABLE_UP = 1;
public const uint ESB_DISABLE_DOWN = 2;
public const uint ESB_DISABLE_LTUP = 1;
public const uint ESB_DISABLE_RTDN = 2;
}
public static class SBFlags
{
public const uint SB_HORZ = 0;
public const uint SB_VERT = 1;
public const uint SB_CTL = 2;
public const uint SB_BOTH = 3;
}
}
private bool Switch = false;
protected override void OnMouseDown(MouseEventArgs e)
{
Native.EnableScrollBar(this.Handle, Native.SBFlags.SB_HORZ, this.Switch ? Native.SBArrows.ESB_DISABLE_BOTH : Native.SBArrows.ESB_ENABLE_BOTH);
this.Switch = !this.Switch;
}
Final Solution
Native.SendMessage(this.Handle, Native.WindowMessages.WM_SETREDRAW, new IntPtr(0), IntPtr.Zero);
Native.EnableScrollBar(this.Handle, Native.SBFlags.SB_HORZ, Native.SBArrows.ESB_ENABLE_BOTH);
Native.SendMessage(this.Handle, Native.WindowMessages.WM_SETREDRAW, new IntPtr(1), IntPtr.Zero);

I don't like this solution much. It does however work:
protected override void OnMouseDown(MouseEventArgs e) {
Native.LockWindowUpdate(this.Handle);
Native.EnableScrollBar(this.Handle, Native.SBFlags.SB_HORZ, this.Switch ? Native.SBArrows.ESB_DISABLE_BOTH : Native.SBArrows.ESB_ENABLE_BOTH);
//this.Invalidate();
Native.LockWindowUpdate(IntPtr.Zero);
this.Switch = !this.Switch;
}