Tab Control To Handle Child Windows In An MDI?
Nov 6, 2009
My application uses an MDI form, and there are instances where the end user will need multiple child windows open at a time. I need an easy way for the user to switch between windows, which made me think of using tabs kinda like Firefox, or like the tabs in the Visual Studio IDE up at the top where you can switch between open forms and code files.
I'm curious if there is a control in .NET that will already do this? I would rather not re-invent the wheel if I can help it. Google has failed me thus far.
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Mar 20, 2010
I am trying to find the handle of the child window for the Yes button in the User Account Control window so i can click it. This window has a structure with a few child windows with the same name.
Dim hwnd As IntPtr = FindWindow(Nothing, "User Account Control")
Dim hwnd2 As IntPtr = FindWindowEx(hwnd, 0, "DirectUIHWND", vbNullString)
Dim hwnd3 As IntPtr = FindWindowEx(hwnd2, 0, "CtrlNotifySink", vbNullString)
Dim hwnd4 As IntPtr = FindWindowEx(hwnd3, 0, "Button", "&Yes")
There are multiple CtrNotifySink with its own Button child window or other child windows. How do i search thru the different CtrNotifySink window to find the one that contain the Yes button so i can send a click to it? I do need to find it before i can send a click, right? because i try just sending it to the main window with sendmessage and nothing happen.I even try sending it directly to the handle found by spy++ of the yes button with bm click but nothing happen?
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Aug 13, 2011
I need to find a Windows forms Text edit which can handle MS Word documents correctly.That is documents with Images, textboxes etc (.doc, .docx).I have tried Devexpress Xtrarichedit and TXText Control but when you load a MS Word Document (.doc, .docx) the document does not appear as it does in MS Word.That is Textboxes overlapping images are misaligned or have no transparent background option, so the white background of the textbox hides part ot the image.Has anybody had experience with 3rd party Document .net editors which mamage MS Word Documents correctly?
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May 30, 2009
I have a User control having two panels. one at the top border and second at the bottom border of the control.
The panels contain some buttons on the click of which i want to display some forms. But I want thoes forms to act like children of the user control i.e. like MDi Parent - Child (here parent being User control and child being the new forms which would be opening). Unfortunately i've not been able to find any way of do'in so.
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Oct 1, 2009
How can I Collect all the Checked Child Nodes Name From a TreeView Control Using VB.NET Windows Applications.
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Jul 14, 2012
I'm in the process of converting a VB6.0 application to VB.Net (2008 Express). I have a MDI parent form, I'll call mdiBackground, and 4 MDI child forms, frmStatus, frmShow, frmQwerty, and frmSentence.The layout is as follows:mdibackground - has the menus at top and is a container for the child forms.frmSentence - appears at the top frmShow & frmQwerty - appear at the left and when one is closed the other one is in the same position.frmStatus - appears at the right, it has buttons which control when frmShow and frmQwerty are to appear I have a couple of regular forms that act as dialog forms. The Me.Close() works fine on these.
[Code]...
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Oct 24, 2009
In my form I hace a Groupbox1, within Groupbox1 have a Groupbox2, within Groupbox2 have a Textbox1..how to call the Texbox1 from another form? When I use Dim newControl As Control = Form1.Controls(Textbox1.Name) I get nothing value?if I use Form1.Controls(Groupbox1.Name) it can get the Groupbox1
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Feb 24, 2012
I've looked throu all of the SendMessage(messages) but there does not seem to be anything like WM_GetPos.Now I can accomplish through AHK with ControlGetPos, but for the life of me I can not figure out what Win API function they are calling to accomplish this.We have an order entry system we use, that I am trying to automate the printing of our reports (we have 4 per order form) to save time
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Jun 30, 2010
I have a UserControl that contains other controls that I would like to be able to rearrange or resize at design time. So I have a custom designer for the UserControl that inherits from System.Windows.Forms.Design.ParentControlDesigner, and I call EnableDesignMode on the child controls from within the designer. That way, at design time, I can drag and drop the child controls to move them, or resize them. But I can also drag and drop the child controls somewhere else on the form that is outside of the original UserControl. Is there a way I can limit the child controls from being moved or resized outside the UserControl?
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Aug 19, 2009
I am still messing around with Cntrl/Copy and Paste from a menustrip. Paste is working fine. The copy is working to a certain extent. It will copy the complete text field from one control to another. how do I determine what is the selected text only. My code below:
Private Sub CopyToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles CopyToolStripMenuItem.Click
Dim activeChild As Form = Me.ActiveMdiChild ' Determine the active child form.
Dim activeControl As Control = activeChild.ActiveControl
[code]....
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May 22, 2010
I am using Visual Basic .Net 2005 professional.From what I understand, I should be disposing of any object that is an unmanaged resource. I understand the best way to tell if a resource is unmanaged is if it has a Dispose method. ie: If I type a dot after my object, intellisense shows .Dispose() as one of the options. If it does, it's an unmanaged resource. Is that correct? In that case, pretty much every control is an unmanaged resource: buttons, forms, panels, etc.In the application I am working on I use an MDIparent container form, which contains MDI children forms, which themselves contain Panels, Menus, Groupboxes, etc, which in turn contain Buttons, Textboxes, Labels, Dropdowns, etc.Do I have to dispose of each button, textbox, label and dropdown within a panel before disposing of the panel?
Do I have to dispose of each panel, menu, and groupbox before disposing of the MDI child form?.Or can I just call the Dispose() method of the MDIchild form and the GarbageCollector will take care of all the controls and resources within the form?Watching the "mem usage" in Windows Task Manager seems to be an unreliable way to detect if I have a memory leak. The numbers just keep climbing and falling (mostly climbing) erratically and without any activity performed on the application. Is there some (relatively) easy way to detect leaks?
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Dec 2, 2010
I am trying to write a program which needs to interact with other programs.For this i need to find the handle of its window and have the user select the right windows. I am thinking of enumerating all windows and put the in a dropdown box. I was able to do this with visual basic but the code does not work wiht vb express. I need some pointer to find the solution.
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Dec 27, 2008
I have work on vb.net 2005, and want to create a small application for handle windows explorer by my application. In this application my needs are.Open Windows explorer on user define Root folder. For example Root Folder is D:ABC and in this root folder some sub folder are present (Number of folder depend on users). For example in under d:ABC three more subfolder are present 1.NSHARMA 2.APOORE 3.SKHANNA, name of folder is user login name in application.
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Jun 11, 2009
I have work on vb.net 2005, and want to create a small application for handle windows explorer by my application. In this application my needs are.Open Windows explorer on user define Root folder. For example Root Folder is D:ABC and in this root folder some sub folder are present (Number of folder depend on users).
For example in under d:ABC three more subfolder are present 1.NSHARMA 2.APOORE 3.SKHANNA, name of folder is user login name in application.I need when NSHARMA login in application then in D:ABC folder only show NSHARMA folder and other folder will hide, D:ABC folder are present on Common Path.In this Application one more common Subfolder under D:ABC it's Name is SharedFolder, it will Share between all user , it can access by at same time all login users and only how will be see it how is permission for it. For Example NSHARMA and APPORE have permission for this then only they will see this subfolder. Then APOORE and SKHANNA will be login in application that time APOORE will see it and SKHANNA does not see it.
[Code]...
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Apr 20, 2012
I have a UserControl named DataGridViewFilterAndSorter that I built using a SplitContainer. In each Panel of the SplitContainer contains a FlowLayoutPanel and in each FlowLayoutPanel contains a LinkLabel.
I have a procedure that accepts a reference to one of the FlowLayoutPanels in the UserControl. I want to get a reference to the UserControl (DataGridViewFilterAndSorter) using the FlowLayoutPanel reference. Currently, I have to use this[code]...
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Sep 22, 2009
I am new to this. am wrting a program that uses the parent forms data...
but i am not able to access the parent object and use it with the client data [code]...
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Aug 23, 2009
In vb.net and made a proj. in vb2005. but when i try to load a particular form(opens up in a mdi container like all others in the project) , an error-error creating windows handle pops up, the line is frmadmn(the form).show
What shall i do? i read a lil on the net about too many handles, user objects etc. but the stats of my proj. at the time of error are-handles-350,threads-17,user objects-235 gdi objects - 159. have these anything to do with the prob.. then what should i do..? i read about the dispose command also about how to use it ? what to dispose...?
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Aug 27, 2010
I get this error as below when I open my "frmAddPrivate" more than 5 times. How I can overcome it?
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Sep 21, 2011
I have created a Windows Service in VB.NET (VS2010) that executes a certain task every minute. When the service is being stopped, either manually by the user, or when the system is rebooted, what can I do to make sure the task is being finished properly before the service is actually terminated?
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Apr 9, 2009
The app Im working on is dunning on an embedded xp machine. It recieves input from the serial port from an industrial process, and then a backgroundworker class calculates and updates the single form GUI with the results from the process. Very simple.Now, the customer want to allow automatic download of log files by an USB memory. The process should work like this:
1)User plug in an usb memory
2)SHow a virtual keypad (touch screen) where the user enter a security code
3)If code ok, show a 3 choice screen, if not ok show error message and allow the user to try again.
4) If user choose the "export all" button, this choose form will close and i display another form with a progress bar that show how all files are copied to the usb memory. When this process is complete, I will display teh form that says "remove the usb memory and press ok to restart the application.
As you see here lots of forms are created and disposed based on user choices. My biggest issue here is that I have no clear design pattern to work from.For example.. should I have this "chain" in the main gui form, or should I let each form create the next form. For example on the "select action" form, when I press export, should this form create and show the "copy progress" form, or should all forms be created and destroyed from the main gui form?
Also, such an issue like with the password. I put it as a constant on the main form, to avoid "magic numbers" in the code. And then I ran into problem because the "keypad" form is created on another thread and I can't access the costant on the main form, so I got a cross thread exception.Everything starts when an USB memory is connected. And the OnConnected eventhandler is running on a different thread than the main UI thread. how to design this chain of window creation/deletion is greatly appreciated. I show all forms with the SHowDialog because I dont want the user to be able to close the form unless he/she presses a button. And not by accident press somewhere else.
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May 8, 2009
I need the intPtr for a form. Control.FromHandle(control) gives me the control from a handle, but I need the opposite--get the handle from a control. How do I do this?
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Apr 27, 2009
I need to get the handle of a control as an IntPtr to pass to a screen capture class in vb.Net 3.0. Tried this but get an invalid handle exception.
Dim hwnd As IntPtr = Runtime.InteropServices.GCHandle.Alloc(CanvasMap)
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Feb 18, 2011
Im working with MDI parent/child objects. when closing the child objects i need the child to check to see if it is the last child object before closing. i couldn't find anything on google, maybe im searching for the wrong thing.
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Apr 15, 2009
What is the best way to handle resolution issues on the monitor when writing a windows app from VB.Net.I developed an app on my laptop, it's widescreen and res is set to 1440 x 900. When I take my app and run it on a machine with an older Analog monitor and the res is 1024 x 768, all of the forms on the right and bottom are cut off.
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Nov 26, 2011
I have searched other forums, google, etc. and have not find a solution. I am creating a VB.NET application using Visual Studio 2010. My application runs fine inside the IDE. Outside of the IDE, it crashes immediately with an OOM exception. I have compiled the program in both VS 2010 and VS2008. The outcome is always the same. I increased my Desktop heap to 12288 meg from 3072 meg thinking that was the issue, but the outcome is the case. Although the increase does improve my response in the IDE. The error is also being reported as related to mscorlib.dll; and my version is for 2.0 framework is 2.0.50727 and for 4.0 framework is 4.0.30319. I am running Windows XP/SP3.
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Sep 17, 2009
Is it possible to send keys to a specific windows handle without having to bring that window to focus?Right now I have the following code almost doing the trick:
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function SetForegroundWindow Lib "user32" Alias "SetForegroundWindow" (ByVal hwnd As Long) As Integer
Sub SendKeysToApplication(ByVal AppTitle As String, ByVal Keys As String)
[code]....
It will bring the windows calculator window to the top and set the value "1" on it.Is it possible to send the keystroke without poping the window?
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Jan 16, 2011
For an app. I'm making I need to find all the windows that belong to a process.
From all of this windows I want to have the handle and title.
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Apr 4, 2011
I'm trying to show all window titles including the corresponding icons, much like Windows Task Manager does. This works only to a certain extent though - although I am able to get the windows' title bar texts, the icon is not always available.
For getting the icon I pass the WM_GETICON message to SendMessage (source):
Public Const WM_GETICON As UInteger = &H7F
Public Function GetWindowIcon(ByVal WindowHandle As IntPtr) As Icon
Dim IconHandle As IntPtr = SendMessage(WindowHandle, WM_GETICON, 0, 0)
[Code].....
For some windows, this returns just the correct icon. For others, it returns Nothing since IconHandle is equal to 0. In Windows Task Manager and on the taskbar they show up just fine.
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Jul 28, 2009
I have a problem with a control leaking GDI handles.
This is the cut-down version of the control:
Public Class FancyLabel
Inherits Label
Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
[CODE]...
When I run the program, the GDI object count is 38. Then I open a form that has only one FancyLabel on it and the GDI object count gets increased to 42. I then close the form and the GDI count falls down to 39 and stays there no matter how many instances of the form I create and close.JV
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Jun 30, 2010
I have a problem to handle an event on a custom control a have on a form.... So first i made a custom control that is just a groupbox with some labels and txtboxes. That control i add dynamically to my form like this (Baycontrol is the name of my control)
Declaration
Code:
Friend Bay(29) As BayControl
Add the controls to Form
Code:
For Simindex = 0 To 29 'Me.Bays - 1
[Code].....
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