I developed a windows application. In which notification form displays right bottom of the window in every 5 min interval. if notification form opens when i working on notepad/excel, the focus automatically transferred to the windows form. I want to prevent this form focus. Is there any solution?
below code working fine.. thank you all..
[DllImport("User32.dll")]
public extern static int ShowWindow(IntPtr hWnd, Int32 cmdShow);
const Int32 SW_SHOWNOACTIVATE = 4;
const Int32 SWP_NOACTIVATE = 0x0010;
const Int32 HWND_TOPMOST = -1;
[DllImport("User32.dll")]
public extern static bool SetWindowPos(
IntPtr hWnd, // handle to window
Int32 hWndInsertAfter, // placement-order handle
Int32 X, // horizontal position
Int32 Y, // vertical position
Int32 cx, // width
Int32 cy, // height
Int32 uFlags // window-positioning options
);
and when you display the popup call the below method:
ShowWindow(this.Handle, SW_SHOWNOACTIVATE);
Related
I have tried looking into this for a while now and have not been able to come up with an answer that has worked. I am trying to register my WPF C# application to listen for Ctrl+C from anywhere while the application is running. The code below is part of my application and does trigger when the user presses Ctrl+C, however, the contents of the Clipboard are stale (the contents are from a previous copy before the application was running). The AnimateWindow function is being called so I know my hotkey registration is working.
So, my issue is that it appears registering for the hotkey below is overriding the copy functionality. I would like to keep this functionality intact as it is part of how my application works. I need to take what was copied and use that data for a database query and to fill a TextBox.
This is just a snippet of the entire project, please let me know if additional example code is needed to help answer. Thank you!
[DllImport("user32.dll")]
private static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk);
[DllImport("user32.dll")]
private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
// CTRL + C Hotkey
private const int COPY_ID = 9001;
private const uint MOD_CONTROL = 0x0002; // Modifier: Control
private const uint VK_C = 0x43; // 'C' key
/* Registering the hotkeys to be monitored */
protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
_windowHandle = new WindowInteropHelper(this).Handle;
_source = HwndSource.FromHwnd(_windowHandle);
_source.AddHook(HwndHook);
RegisterHotKey(_windowHandle, COPY_ID, MOD_CONTROL, VK_C); // 'C' key
}
/* The hook for pressing a hotkey */
private IntPtr HwndHook(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
const int WM_HOTKEY = 0x0312;
switch (msg)
{
case WM_HOTKEY:
switch (wParam.ToInt32())
{
case COPY_ID:
AnimateWindow();
break;
}
}
}
I have a text control (RichTextBox) that is at the full height of the display when active. How do I make tht RTB to always be positioned vertically on the middle of the rich text box as the user types text?
Notice I said vertically because horizontally it should be at the character position where the user is typing, thus unchanged by the program.
Maybe this might work,
private const int WM_VSCROLL = 0x0115;
private const int SB_PAGEUP =2; // one page up
[DllImport("user32.dll")]
private static extern int SendMessage(IntPtr hWnd, int wMsg, IntPtr wParam,
IntPtr lParam);
private void richTextBox1_TextChanged(object sender, EventArgs e)
{
SendMessage(richTextBox1.Handle, WM_VSCROLL, (IntPtr)SB_PAGEUP, IntPtr.Zero);
}
Hope helps,
How can I open the DateTimePicker C# control programmatically?
I want to show the Calendar in the Datetime Picker control by sending keys to the control.
Is there a way we can do that?
Try the following
//part of the usings
using System.Runtime.InteropServices;
//declares
[DllImport("user32.dll")]
private static extern bool PostMessage(
IntPtr hWnd, // handle to destination window
Int32 msg, // message
Int32 wParam, // first message parameter
Int32 lParam // second message parameter
);
const Int32 WM_LBUTTONDOWN = 0x0201;
//method to call dropdown
private void button1_Click(object sender, EventArgs e)
{
Int32 x = dateTimePicker1.Width - 10;
Int32 y = dateTimePicker1.Height / 2;
Int32 lParam = x + y * 0x00010000;
PostMessage(dateTimePicker1.Handle, WM_LBUTTONDOWN, 1,lParam);
}
On my system (Windows 7, .NET 35) the other solutions did not work. I found another solution on a MS discussion site that did work.
using System.Runtime.InteropServices;
public static class Extensions
{
[DllImport("user32.dll", SetLastError = true)]
private static extern int SendMessage(IntPtr hWnd, uint Msg, int wParam, int lParam);
private const uint WM_SYSKEYDOWN = 0x104;
public static void Open(this DateTimePicker obj)
{
SendMessage(obj.Handle, WM_SYSKEYDOWN, (int)Keys.Down, 0);
}
}
Source : http://social.msdn.microsoft.com/Forums/windows/en-US/f2f0b213-d57a-46de-b924-e21b7ac0882e/programmatically-open-the-calendar-of-the-datetimepicker-control?forum=winforms
Usage:
dateTimePicker1.Open();
Warnings. This will not work if the dateTimePicker1 is a Control on DataGridView (ie if you try to make a pop-up DatePicker on the DGV). It does work if the Control is added to the Form instead. What will happen is that the synthesized cursor "down" event will be swallowed by the DGV, and will move the current cell pointer down one instead of drop-drop the Calendar of the DTP.
Source: https://social.msdn.microsoft.com/Forums/windows/en-US/f2f0b213-d57a-46de-b924-e21b7ac0882e/programmatically-open-the-calendar-of-the-datetimepicker-control?forum=winforms
Refer answer by David M Morton https://social.msdn.microsoft.com/profile/david%20m%20morton/?ws=usercard-mini
//DateTimePicker dtpicker
dtpicker.Select();
SendKeys.Send("%{DOWN}");
"%{DOWN}" Key combination - Alt key(%) +Down arrow
code to programmatically trigger key down event for datetimepicker
(particularly the event of click on the dropdown arrow in a datetimepicker)
Credit goes to astander for providing the solution, which makes a very nice extension:
using System.Linq;
using System.Runtime.InteropServices;
public static class Extensions {
[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern int PostMessage(IntPtr hwnd, Int32 wMsg, Int32 wParam, Int32 lParam);
public static void Open(this DateTimePicker obj) {
const int WM_LBUTTONDOWN = 0x0201;
int width = obj.Width - 10;
int height = obj.Height / 2;
int lParam = width + height * 0x00010000; // VooDoo to shift height
PostMessage(obj.Handle, WM_LBUTTONDOWN, 1, lParam);
}
}
Usage:
dateTimePicker1.Open();
This way, you can reuse your Extension anytime you'd like, over and over, in any form using any DateTimePicker control.
The accepted answer is mostly correct, however you should also use:
PostMessage(dateTimePicker1.Handle, WM_LBUTTONUP, 1,lParam);
After posting the WM_LBUTTONDOWN event.
Also, obviously WM_LBUTTONUP must be previously defined:
const Int32 WM_LBUTTONUP = 0x0202;
So my answer is:
using System.Runtime.InteropServices;
//declares
[DllImport("user32.dll")]
private static extern bool PostMessage(
IntPtr hWnd, // handle to destination window
Int32 msg, // message
Int32 wParam, // first message parameter
Int32 lParam // second message parameter
);
const Int32 WM_LBUTTONDOWN = 0x0201;
const Int32 WM_LBUTTONUP = 0x0202;
//method to call dropdown
private void button1_Click(object sender, EventArgs e)
{
Int32 x = dateTimePicker1.Width - 10;
Int32 y = dateTimePicker1.Height / 2;
Int32 lParam = x + y * 0x00010000;
PostMessage(dateTimePicker1.Handle, WM_LBUTTONDOWN, 1,lParam);
PostMessage(dateTimePicker1.Handle, WM_LBUTTONUP, 1,lParam);
}
This avoids Mark Lakata's bug in Windows 7 and/or .NET 3.5.
The reasoning is simple: the original code simulates a mouse button down event, but doesn't get the mouse button up again as we would when we click the button.
In that regard, you can try it out yourself: if you press the left mouse button to open a DateTimePicker and don't release the button, you also won't be able to use the control.
Edit: Adapting jp2code's answer:
using System.Runtime.InteropServices;
public static class Extensions {
[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern int PostMessage(IntPtr hwnd, Int32 wMsg, Int32 wParam, Int32 lParam);
public static void Open(this DateTimePicker obj) {
const int WM_LBUTTONDOWN = 0x0201;
const int WM_LBUTTONUP = 0x0202;
int width = obj.Width - 10;
int height = obj.Height / 2;
int lParam = width + height * 0x00010000; // VooDoo to shift height
PostMessage(obj.Handle, WM_LBUTTONDOWN, 1, lParam);
PostMessage(obj.Handle, WM_LBUTTONUP, 1, lParam);
}
}
I liked some of the previous ideas and finished with this (tested) Mix:
public static class Extensions {
public static void Open(this DateTimePicker obj)
{
obj.Select();
SendKeys.Send("%{DOWN}");
}
}
Usage:
dateTimePicker1.Open();
dateTimePicker2.Open();
How can a Windows Forms ListView be programmatically scrolled left/right?
Maybe a SendMessage can be sent to the control's horizontal scrollbar?
Try This
[DllImport("user32")]
static extern IntPtr SendMessage(IntPtr Handle, Int32 msg, IntPtr wParam,
IntPtr lParam);
protected void ScrollH(int pixelsToScroll)
{
const Int32 LVM_FIRST = 0x1000;
const Int32 LVM_SCROLL = LVM_FIRST + 20;
SendMessage(lvwList.Handle, LVM_SCROLL, (IntPtr) pixelsToScroll,
IntPtr.Zero);
}
This code works in a windows forms application (it shows the preview) but not in a WPF application.
WMEncoder _encoder;
WMEncDataView _preview;
_encoder = new WMEncoder();
IWMEncSourceGroupCollection SrcGrpColl = _encoder.SourceGroupCollection;
IWMEncSourceGroup2 sourceGroup = (IWMEncSourceGroup2)SrcGrpColl.Add("SG_1");
IWMEncVideoSource2 videoDevice = (IWMEncVideoSource2)sourceGroup.AddSource(WMENC_SOURCE_TYPE.WMENC_VIDEO);
videoDevice.SetInput("Default_Video_Device", "Device", "");
IWMEncAudioSource audioDevice = (IWMEncAudioSource)sourceGroup.AddSource(WMENC_SOURCE_TYPE.WMENC_AUDIO);
audioDevice.SetInput("Default_Audio_Device", "Device", "");
IWMEncProfile2 profile = new WMEncProfile2();
profile.LoadFromFile("Recording.prx");
sourceGroup.set_Profile(profile);
_encoder.PrepareToEncode(true);
_preview = new WMEncDataView();
int lpreviewStream = videoDevice.PreviewCollection.Add(_preview);
_encoder.Start();
_preview.SetViewProperties(lpreviewStream, (int)windowsFormsHost1.Handle);
_preview.StartView(lpreviewStream);
I've tried to use the WindowsFormsHost control to get a handle to pass (as shown in the sample), but still no luck.
I've recently done something similar to integrate an existing DirectShow video component with a new WPF UI. There are a variety of ways to do it, but probably the easiest is to derive a new class from HwndHost. You then simply override a couple of methods, give the window handle to your preview stream and it should all just work. depending on your requirements you may need to handle a couple of Windows messages in your WndProc to handle display changes and redrawing when the video's not playing.
using System;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;
namespace SOQuestion
{
public class VideoHost : HwndHost
{
protected override HandleRef BuildWindowCore(HandleRef hwndParent)
{
IntPtr hwndHost = IntPtr.Zero;
int hostHeight = (int) this.ActualHeight;
int hostWidth = (int) this.ActualWidth;
hwndHost = CreateWindowEx(0, "static", "",
WS_CHILD | WS_VISIBLE,
0, 0,
hostHeight, hostWidth,
hwndParent.Handle,
(IntPtr)HOST_ID,
IntPtr.Zero,
0);
return new HandleRef(this, hwndHost);
}
protected override void DestroyWindowCore(HandleRef hwnd)
{
DestroyWindow(hwnd.Handle);
}
protected override void OnWindowPositionChanged(Rect rcBoundingBox)
{
base.OnWindowPositionChanged(rcBoundingBox);
_preview.SetViewProperties(lpreviewStream, (int)this.Handle);
}
protected override IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
// Handle a couple of windows messages if required - see MSDN for details
return base.WndProc(hwnd, msg, wParam, lParam, ref handled);
}
[DllImport("user32.dll", EntryPoint = "CreateWindowEx", CharSet = CharSet.Auto)]
internal static extern IntPtr CreateWindowEx(int dwExStyle,
string lpszClassName,
string lpszWindowName,
int style,
int x, int y,
int width, int height,
IntPtr hwndParent,
IntPtr hMenu,
IntPtr hInst,
[MarshalAs(UnmanagedType.AsAny)] object pvParam);
[DllImport("user32.dll", EntryPoint = "DestroyWindow", CharSet = CharSet.Auto)]
internal static extern bool DestroyWindow(IntPtr hwnd);
internal const int WS_CHILD = 0x40000000;
internal const int WS_VISIBLE = 0x10000000;
internal const int HOST_ID = 0x00000002;
}
}