i'm currently trying to get wndproc handling in wpf but without any success..
i need to get the event of window created, window activated and window destroid events.
here's what i tried so far
int uMsgNotify;
public MainWindow()
{
InitializeComponent();
WinApi.SetTaskmanWindow(new WindowInteropHelper(this).Handle);
WinApi.RegisterShellHookWindow(new WindowInteropHelper(this).Handle);
uMsgNotify = WinApi.RegisterWindowMessage("SHELLHOOK");
MainForm.ShowInTaskbar = false;
MainForm.ShowActivated = true;
}
protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
HwndSource source = PresentationSource.FromVisual(this) as HwndSource;
source.AddHook(WndProc);
}
private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
IntPtr handle;
if (msg == uMsgNotify)
{
switch (wParam.ToInt32())
{
case WinApi.HSHELL_WINDOWCREATED:
handle = lParam;
string windowName = GetWindowName(handle);
IntPtr hWnd = WinApi.FindWindow(null, windowName);
add_icon(windowName, handle);// add new task's icon in taskbar
break;
case WinApi.HSHELL_WINDOWACTIVATED:
handle = lParam;
break;
case WinApi.HSHELL_WINDOWDESTROYED:
handle = lParam;
del_icon(handle); //remove icon from taskbar
break;
}
}
return IntPtr.Zero;
}
private static string GetWindowName(IntPtr hWnd)
{
// Allocate correct string length first
int length = WinApi.GetWindowTextLength(hWnd);
StringBuilder sb = new StringBuilder(length + 1);
WinApi.GetWindowText(hWnd, sb, sb.Capacity);
return sb.ToString();
}
code doesn't give any kind of runtime error whatsoever.... but it wont work..
to make more sense i'm developing an alternate shell for windows for my gaming cafe... where it needs to have a kind of taskbar..
any help?
I don't know if you still need it but : If you use ShowInTaskbar = false, it won't be able to catch any message with WndProc.
Related
I created a library which lets you move any window behind the desktop icons using the user32.dll, but the problem is that the window doesn't react neither to clicks or key presses (even KeyboardDevice didn't seem to capture anything)'
One thing to note though is that after I make any window run on that wallpaper layer, it disappears from the task bar.
This is the code:
public static void MoveBehindIcons(IntPtr windowHandle)
{
IntPtr window = W32.FindWindow("Progman", (string) null);
IntPtr result = IntPtr.Zero;
int num1 = 1324;
IntPtr wParam = new IntPtr(0);
IntPtr zero = IntPtr.Zero;
int num2 = 0;
int num3 = 1000;
W32.SendMessageTimeout(window, (uint) num1, wParam, zero, (W32.SendMessageTimeoutFlags) num2, (uint) num3, out result);
IntPtr workerw = IntPtr.Zero;
W32.EnumWindows((W32.EnumWindowsProc) ((tophandle, topparamhandle) =>
{
if (W32.FindWindowEx(tophandle, IntPtr.Zero, "SHELLDLL_DefView", IntPtr.Zero) != IntPtr.Zero)
workerw = W32.FindWindowEx(IntPtr.Zero, tophandle, "WorkerW", IntPtr.Zero);
return true;
}), IntPtr.Zero);
W32.SetParent(windowHandle, workerw);
}
the W32 class: https://pastebin.com/Tw72Lbw6
WallpaperEngine can do it somehow..
Is it possible to make it work?
I have a Windows 8.1 wpf application that can change its mode: kiosk or maintenance. For the kiosk mode I have a code:
window.WindowStyle = WindowStyle.None;
window.WindowState = WindowState.Maximized;
window.Topmost = true;
It work very good, but when I change the mode from the maintenance to the kiosk mode I have a problem: if window was maximized before (window.WindowState == WindowState.Maximized) a taskbar stay visible.
I tried resolve this problem: I calculated monitor width and height using User32.dll:
public MainWindow()
{
InitializeComponent();
this.SourceInitialized += new EventHandler(win_SourceInitialized);
}
void win_SourceInitialized(object sender, EventArgs e)
{
System.IntPtr handle = (new WindowInteropHelper(this)).Handle;
HwndSource.FromHwnd(handle).AddHook(new HwndSourceHook(WindowProc));
}
private static System.IntPtr WindowProc(System.IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
switch (msg)
{
case 0x0024:
WmGetMinMaxInfo(hwnd, lParam);
handled = true;
break;
}
return (IntPtr)0;
}
private static void WmGetMinMaxInfo(System.IntPtr hwnd, System.IntPtr lParam)
{
MINMAXINFO mmi = (MINMAXINFO)Marshal.PtrToStructure(lParam, typeof(MINMAXINFO));
// Adjust the maximized size and position to fit the work area of the correct monitor
int MONITOR_DEFAULTTONEAREST = 0x00000002;
System.IntPtr monitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
if (monitor != System.IntPtr.Zero)
{
MONITORINFO monitorInfo = new MONITORINFO();
GetMonitorInfo(monitor, monitorInfo);
RECT rcMonitorArea = monitorInfo.rcMonitor;
mmi.ptMaxPosition.x = rcMonitorArea.left;
mmi.ptMaxPosition.y = rcMonitorArea.top;
mmi.ptMaxSize.x = Math.Abs(rcMonitorArea.right - rcMonitorArea.left);
mmi.ptMaxSize.y = Math.Abs(rcMonitorArea.bottom - rcMonitorArea.top);
}
Marshal.StructureToPtr(mmi, lParam, true);
}
[DllImport("user32.dll")]
internal static extern bool GetMonitorInfo(IntPtr hMonitor, MONITORINFO lpmi);
[DllImport("user32.dll")]
static extern bool GetCursorPos(ref Point lpPoint);
[DllImport("User32.dll")]
internal static extern IntPtr MonitorFromWindow(IntPtr handle, int flags);
But it don't work after maximizes window in maitenance mode whatever. I understand that WindowState is WindowState.Maximized already and event of change window size do not happen. But I don't know how I can resolve it.
Of course, I can change the size of my window before maximizing:
window.WindowStyle = WindowStyle.None;
window.WindowState = WindowState.Normal;
window.WindowState = WindowState.Maximized;
window.Topmost = true;
It work, but I see flicker of the window. It's very bad for me.
I hope somebody had this bug and he resolved it happily.
I am runnig an external application from my WPF Project and I am putting external app inside my WPF form with using "user32.dll"
External app has an exit button. I would like to remove or hide that button. Can I do that "using user32.dll" or different approach?
Thank you in advance.
The below code finds the button and hides it. It works gracefully on my system. The code searches for the window title and then find the control. You have to provide the window title and button text. You can update the code as per your need.
Note: Below code will hide all the controls with the matching text specified in the constant TEXT_BUTTON.
const string TEXT_TITLE = "My Specific Window";
const string TEXT_BUTTON = "&HideMeButton";
public delegate bool EnumWindowProc(IntPtr hWnd, IntPtr parameter);
[DllImport("user32.dll")]
private static extern bool ShowWindow(IntPtr hwnd, int nCmdShow);
const int SW_HIDE = 0;
[DllImport("user32")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool EnumChildWindows(IntPtr window, EnumWindowProc callback, IntPtr i);
[DllImport("user32.dll", EntryPoint = "GetWindowText", CharSet = CharSet.Auto)]
static extern IntPtr GetWindowCaption(IntPtr hwnd, StringBuilder lpString, int maxCount);
public void HideSpecificButton()
{
//Contains the handle, can be zero if title not found
var handleWindow = WinGetHandle(TEXT_TITLE);
if (GetWindowCaption(handleWindow).Trim() != TEXT_TITLE)
MessageBox.Show("Window is hidden or not running.");
else
GetChildWindows(handleWindow);
}
public IntPtr WinGetHandle(string title)
{
IntPtr hWnd = IntPtr.Zero;
foreach (Process pList in Process.GetProcesses())
{
if (pList.MainWindowTitle.Contains(title))
{
hWnd = pList.MainWindowHandle;
}
}
return hWnd;
}
private string GetWindowCaption(IntPtr hwnd)
{
StringBuilder sb = new StringBuilder(256);
GetWindowCaption(hwnd, sb, 256);
return sb.ToString();
}
public void GetChildWindows(IntPtr parent)
{
List<IntPtr> result = new List<IntPtr>();
GCHandle listHandle = GCHandle.Alloc(result);
try
{
EnumWindowProc childProc = new EnumWindowProc(EnumControls);
EnumChildWindows(parent, childProc, GCHandle.ToIntPtr(listHandle));
}
finally
{
if (listHandle.IsAllocated)
listHandle.Free();
}
}
private bool EnumControls(IntPtr handle, IntPtr pointer)
{
var controlTitle = GetWindowCaption(handle).Trim();
if (string.Equals(controlTitle, TEXT_BUTTON, StringComparison.CurrentCultureIgnoreCase))
{
//hide the control
ShowWindow(handle, SW_HIDE);
}
return true;
}
"using user32.dll"
No you can't use user32.dll for each app is in their own sandbox so to speak and should be impervious to outside unwanted actions.
(Q: Do you have access to build this external app? A: Y ) ...or different approach?
Since you have access to the code of both apps, have them implement an interprocess named pipe. In the receiving app have it monitor the pipe for a message to turn off the button(s) or change its windows frame style.
See
How to: Use Named Pipes for Network Interprocess Communication
Goal: write a C# app that runs in the background, listens for the key combination Win-V, and when that occurs, pastes the clipboard contents into the current active window (some arbitrary app). Essentially I'm trying to mimic PureText, but I'm not bothering to convert the text to plain text first.
Problem: pasting into the currently active windows is not working.
Details: To listen in the background for key presses I'm using the globalKeyboardHook class from A Simple C# Global Low Level Keyboard Hook. I'm able to catch Win-V events, but I'm not able to send the paste command properly. I can send the paste by using the functions SendKeys.Send or keybd_event. However, they send another "V" press down the pipeline which gets caught by the gkh_KeyDown event and causes multiple paste events to fire.
I'm expecting that I need to use SendMessage or PostMessage, but all my attempts to do that have failed so far. Below is the full code with the last function, SendCtrlV, being the one of interest. The comments explain everything I've tried so far. Can you see what I'm missing?
using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using Utilities;
namespace KeyHookTest
{
public partial class Form1 : Form
{
private bool LWin_down;
private bool V_down;
globalKeyboardHook gkh = new globalKeyboardHook();
[DllImport("user32.dll", CharSet = CharSet.Auto)]
static public extern IntPtr GetForegroundWindow();
[DllImport("user32.dll")]
static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, uint dwExtraInfo);
[DllImport("user32.dll")]
private static extern int SendMessage(IntPtr hwnd, int msg, int wParam, int lParam);
[DllImport("user32.dll")]
public static extern IntPtr PostMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
gkh.HookedKeys.Add(Keys.V);
gkh.HookedKeys.Add(Keys.LWin);
gkh.KeyDown += new KeyEventHandler(gkh_KeyDown);
gkh.KeyUp += new KeyEventHandler(gkh_KeyUp);
}
void gkh_KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.LWin)
LWin_down = false;
else
V_down = false;
}
void gkh_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.LWin)
LWin_down = true;
else
V_down = true;
if (LWin_down && V_down)
{
LogDebug("Enter Win+V");
try
{
SendCtrlV();
}
catch { }
}
}
private void SendCtrlV()
{
uint KEYEVENTF_KEYUP = 2;
int KEYDOWN = 0x0100;
int KEYUP = 0x0101;
byte KEY_LCONTROL1 = 0x11;
IntPtr KEY_LCONTROL2 = new IntPtr(0x11);
byte KEY_V1 = 0x56;
IntPtr KEY_V2 = new IntPtr(0x56);
int WM_PASTE1 = 0x302;
uint WM_PASTE2 = 0x302;
IntPtr hWnd = GetForegroundWindow();
// Works, but causes multiple gkh_KeyDown to fire so it's slow and buggy
/*keybd_event(KEY_LCONTROL1, 0, 0, 0);
keybd_event(KEY_V1, 0, 0, 0);
keybd_event(KEY_V1, 0, KEYEVENTF_KEYUP, 0);
keybd_event(KEY_LCONTROL1, 0, KEYEVENTF_KEYUP, 0);*/
// Works, but causes multiple gkh_KeyDown to fire so it's slow and buggy
//SendKeys.Send("^v");
// Doesn't work, causes UAC prompt
//SendKeys.Send("{^}v");
// Doesn't work, nothing gets pasted to the foregroundwindow
//SendMessage(hWnd, WM_PASTE1, 0, 0);
// Doesn't work, nothing gets pasted to the foregroundwindow
//PostMessage(hWnd, WM_PASTE2, IntPtr.Zero, IntPtr.Zero);
// Doesn't work, nothing gets pasted to the foregroundwindow
/*SendMessage(hWnd, KEYDOWN, KEY_LCONTROL1, 0);
SendMessage(hWnd, KEYDOWN, KEY_V1, 0);
SendMessage(hWnd, KEYUP, KEY_V1, 0);
SendMessage(hWnd, KEYUP, KEY_LCONTROL1, 0);*/
// Doesn't work, nothing gets pasted to the foregroundwindow
/*PostMessage(hWnd, 0x0100, KEY_LCONTROL2, IntPtr.Zero);
PostMessage(hWnd, 0x0100, KEY_V2, IntPtr.Zero);
PostMessage(hWnd, 0x0101, KEY_V2, IntPtr.Zero);
PostMessage(hWnd, 0x0101, KEY_LCONTROL2, IntPtr.Zero);*/
}
private void LogDebug(string msg)
{
string logpath = Environment.GetEnvironmentVariable("USERPROFILE") + #"\Desktop\KeyHookTest.txt";
File.AppendAllText(logpath, DateTime.Now.ToString("HH:mm:ss:fff") + ": " + msg + "\r\n");
}
}
}
These additional links helped lead me to the answer:
How to get active child window
How can I find the active child window?
Here's what's working for me:
private void SendCtrlV()
{
IntPtr hWnd = GetFocusedHandle();
PostMessage(hWnd, WM_PASTE, IntPtr.Zero, IntPtr.Zero);
}
static IntPtr GetFocusedHandle()
{
var info = new GuiThreadInfo();
info.cbSize = Marshal.SizeOf(info);
if (!GetGUIThreadInfo(0, ref info))
throw new Win32Exception();
return info.hwndFocus;
}
It works, but you must use the TextBox's native window handle if you want it to be effective
I am trying to create a WPF window with WindowStyle="None" (for custom buttons and no title) that cannot be resized. Setting ResizeMode to NoResize removes the aero border, which I want to keep.
I could set the min/max size properties and be done with it, except that:
The resize cursors are still visible, and
The window is displayed in response to a user action and fits to its contents. It displays an image, so the size changes.
So, I have a simple scheme that gets me 99% of the way there:
public class BorderedWindowNoResize : Window
{
[DllImport( "DwmApi.dll" )]
public static extern int DwmExtendFrameIntoClientArea(
IntPtr hwnd,
ref MARGINS pMarInset );
[DllImport( "user32.dll", CharSet = CharSet.Auto )]
public static extern IntPtr DefWindowProc(
IntPtr hWnd,
int msg,
IntPtr wParam,
IntPtr lParam );
public BorderedWindowNoResize()
{
Loaded += BorderedWindowNoResize_Loaded;
}
private void BorderedWindowNoResize_Loaded( object sender, RoutedEventArgs e )
{
IntPtr mainWindowPtr = new WindowInteropHelper( this ).Handle;
HwndSource mainWindowSrc = HwndSource.FromHwnd( mainWindowPtr );
mainWindowSrc.AddHook( WndProc );
}
private IntPtr WndProc( IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled )
{
var htLocation = DefWindowProc( hwnd, msg, wParam, lParam ).ToInt32();
if( msg == (uint)WM.NCHITTEST )
{
handled = true;
switch( htLocation )
{
case (int)HitTestResult.HTBOTTOM:
case (int)HitTestResult.HTBOTTOMLEFT:
case (int)HitTestResult.HTBOTTOMRIGHT:
case (int)HitTestResult.HTLEFT:
case (int)HitTestResult.HTRIGHT:
case (int)HitTestResult.HTTOP:
case (int)HitTestResult.HTTOPLEFT:
case (int)HitTestResult.HTTOPRIGHT:
htLocation = (int)HitTestResult.HTBORDER;
break;
}
}
return new IntPtr( htLocation );
}
}
Basically;
Override the window procedure.
Call the default window procedure.
If the message it is WM_NCHITTEST, check for the border results.
If it is a border, return the regular HTBORDER.
This works as far as allowing me to keep the aero window border and hiding the resize cursor(s), but it adds a ~5 pixel white border to the inside of my window.
In fact, even if I return the default windows procedure result at the top of WndPrc and do nothing else the border is still there. I need a different background color on my window, so this won't work for me.
Any ideas? Thanks in advance as always.
When you add your hook, you should only handle the messages you need to, and ignore the others. I believe you are handling certain messages twice, since you call DefWindowProc, but never set the handled parameter to true.
So in your case, you'd use:
private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled) {
if (msg == (uint)WM.NCHITTEST) {
handled = true;
var htLocation = DefWindowProc(hwnd, msg, wParam, lParam).ToInt32();
switch (htLocation) {
case (int)HitTestResult.HTBOTTOM:
case (int)HitTestResult.HTBOTTOMLEFT:
case (int)HitTestResult.HTBOTTOMRIGHT:
case (int)HitTestResult.HTLEFT:
case (int)HitTestResult.HTRIGHT:
case (int)HitTestResult.HTTOP:
case (int)HitTestResult.HTTOPLEFT:
case (int)HitTestResult.HTTOPRIGHT:
htLocation = (int)HitTestResult.HTBORDER;
break;
}
return new IntPtr(htLocation);
}
return IntPtr.Zero;
}
Also, I'd probably add the hook in an OnSourceInitialized override, like so:
protected override void OnSourceInitialized(EventArgs e) {
base.OnSourceInitialized(e);
IntPtr mainWindowPtr = new WindowInteropHelper(this).Handle;
HwndSource mainWindowSrc = HwndSource.FromHwnd(mainWindowPtr);
mainWindowSrc.AddHook(WndProc);
}
You can try from anywhere in a WPF App
ComponentDispatcher.ThreadFilterMessage += new ThreadMessageEventHandler(ComponentDispatcherThreadFilterMessage);
and:
// ******************************************************************
private static void ComponentDispatcherThreadFilterMessage(ref MSG msg, ref bool handled)
{
if (!handled)
{
if (msg.message == WmHotKey)
{
HotKey hotKey;
if (_dictHotKeyToCalBackProc.TryGetValue((int)msg.wParam, out hotKey))
{
if (hotKey.Action != null)
{
hotKey.Action.Invoke(hotKey);
}
handled = true;
}
}
}
}