Making A NET WinForms Form A Child Of A Native Application
Nov 9, 2010
I have a NET (version 3.5) Class Library written in VBNET 2008 (on Windows 7 x64) that will at times display a WinForm. The class lib will be used in Excel, and I want to set the NET WinForm to be a child of the Excel Application window. If I weren't using NET, I would just call the SetParent API function, but I can't seem to get this to work since WinForms (I assume) don't have a HWnd suitable for SetParent. I'm sure this is possible, but I just can't find the right properties and methods. The WinForm will be shown modelessly so the user can switch back and forth between Excel and the displayed WinForm.
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May 14, 2010
How can I disable the parent form when I call a child form?This code doesn't disable the parent form like I thought it would:
frmChild.ShowDialog()
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Feb 29, 2012
I want to create a custom form (in visual basic .NET) that will stop other process responsiveness until the form is acknowledged. It would be a nice bonus if I can add a beep when trying to access the main program UI while this form is displayed as well (like how a messagebox does).
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Jan 23, 2011
Does anyone know how to make the controls on an MDI Child form resize along with the form itself? I inherited a project from another developer and I was asked specifically to make the form resize. With advice I received on this forum I now have the form resizing as expected. It will minimize, restore and maximize as well as resize with the mouse pointer.
The problem is that when I increase the size of the form all I get is more blank space on the screen. The controls to do change at all. Although I thin this is normal behavior for a Windows form my bosses all seem to think that the controls resize on every other widows for they see. I wondered if anyone had successfully accomplished this. I was already advised to write a FormResize handling subroutine and this unfortunately did not work.
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Sep 28, 2010
1) I m very new to VB.NEt 2008. I have placed a MDI Form in my project and a Form too. I want to make the form to a Child Form of MDI. is there any property or how can it possible.
2) I want to set the lable back color to Transparent but found no property.
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Aug 29, 2010
I am creating a program that interacts with another program and I would like to "inject" my program into this program as an MDI Child window. Is this even possible, and if so can it be done in VB.NET? What kind of pitfalls are associated with doing this?
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Nov 21, 2011
I've a winforms application that is using SQLite database. There is no encryption on the database (data has to be shared with other user). It is a stand alone application with a stand alone local database.
The difficulty I'm encountering is when people go to bring all the data together.The databases are attached, data imported, but records are differentiated by a database GUID.At any rate I am desiring to have a database selection screen that is protected by a password to prevent users mistakenly switching databases (and some level of protection against malicious use).
Thinking it's probably not a particularly good idea to store the password in an unecrypted database.Security is not a large issue as this is only distributed to users that need the software.
What would be the best method to have the user type a password when they attempt to access the database selection screen? ShowDialog? Pop open a new child form with a password TextBox, then on validation (via button?) close the password form and open the protected form?I see a fair bit about protecting a whole application, but not so much about a specific form.
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May 6, 2010
I have 2 vb.net applications. First application is a mdiform and childform. Second application is a single form. I want to open second form as a child form in first application.
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Nov 15, 2011
I'm trying to print a barcode using the following code in Lightswitch Application[code]...
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Aug 16, 2011
I've made a Windows Forms Application that runs fine. It has some buttons that open child forms, which can simply close again without any problem. As I need the form to be in a dll, I changed the application type to a class library and added an extra project containing an exe-file that only references the main form in the dll and shows it. So far so good...
The main form is basically a tabcontrol with a bunch of controls, buttons among others. Five buttons on different tabs use the same handler to open a child form. When I click the button on the first tab everything works fine. The form opens and when it closes, only the child closes. When I click any of the buttons on the other tabs, the child form opens and when it closes again, both the child and the main form close...
I am stumped, especially since all buttons use the same code to open the child form and everything appears to be completely identical, yet the results are not. Below I have pasted the code that opens the main and child forms. I am undoubtedly not looking in the right place, but I also have no idea where to look anymore, let alone what to look for...
The code opening the main form:
Public Sub StartProgram()
'Load the form and show it
Dim frmProgram As frmMain = New frmMain
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May 28, 2011
how to get all the active mdi child in an application..it is possible to work? me.ActiveMdiChild.Name
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Mar 21, 2011
To do some testing with MPIR, GMP, the .Net Bigint module and other math libraries I've recently written a small program which allows me to create random sequences of numbers with a certain amount of precision: Always this amount of digits in front and behind the comma, no starting/ending zeroes. While it might not be the most elegant of code, it really blew my mind when I found out my application was running up to 10 times faster with Mono under Ubuntu 10.10.While the code is not elegant and in Basic, it was developed by me in about an hour's work and it serves the purpose: To generate dependable huge datasets consisting solely of preconfigured numbers before or after the comma. To get a general idea the UI's posted here:[code]Eliminating IO by not writing to IO but just to a List instead Eliminating an "if" path which checks if the random before/after float character is checked.Disabled progress reporting in general which causes the backgroundworker to not report any progress.Play around with the amount of symbols, theres very little difference between just getting 1 random character or getting 15 per record.I'm at a loss to what causes my program to run so slow under Windows/.Net compared to Ubuntu/Mono. I'm only a "half programmer", which means: I'm a Bussiness and ICT student who mainly focusses on human ICT, and the Microsoft Platforms certainly have lead on that, however such a huge performance hit compared to Linux for this soul and simple program really gives me a cold chill when it comes to my favourite platform.
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Jan 25, 2011
To create splash screen before InitializeComponent, the WithEvents statement for the BackgroundWorker component needs to be moved from the Form's Designer.vb file into the constructor as indicated in the first commented lines of the constructor below.
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Dec 9, 2009
I want to translate those application text to some native languages with my program.
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Dec 15, 2011
I have an issue when I place a label box in the MDI Parent form and then open a child form the label box highlighted in child form?
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Jul 13, 2010
I have a mdi and 3 child windows.The program start with an empty mdi.With a menu you can open each child window once.When i open for example 2 windows. And close the one on top. The one left(the window under the one i closed) should get focus. How can i manage this?
why i need this?each childwindow has a event gotFocus. Depending on the focus my menu should change.
Private Sub frmMain_gotFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.GotFocus
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Nov 30, 2007
I have a MDI form that has a child form that is opened by default when the application loads. I also automatically maximize the child form. Even though I have set ShowIcon to false, the little blank image that indicates that there is no icon appears in the upper left hand corner of the form. Is there a way to get rid of this?
Private WithEvents m_frmLineItems As frmLineItems
m_frmLineItems = New frmLineItems(Me)
mfrmLineItems.WindowState = FormWindowState.Maximized
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Nov 17, 2011
I have a MenuStrip with File > New, Open, Save, Exit located in a parent form, and a RichTextBox located in a child form.The problem I'm running into is concerned with the destination of the file elected from "Open" and the save.When a user selects their file from "Open", I need it to open the child form and put the text into the RichTextBox.I also need the program to be able to "Save" from a child form, whether it's been brought up via "New" or "Open".
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Apr 29, 2009
findwindowEX Send Message in Child of a Child of an ApplicationFirst:- my english is very ad (german)- i am a newby of Visual BasicMy Form with SQL-Integration is sending Data per Button to Notepad sucessfull. Unfortunately, the purpose application has interlocking children.But the application don become the data. to found a solution / or a Idear. i think i put in screenshots an my
Public Class Form1
'Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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Aug 26, 2009
I'm attempting to download a file with a custom "message" i.e. with specific bytes sent to a server. I am using the lightweight utorrent setup file which could be easily downloaded with the statement in the first code tag or even using a WebRequest, WebResponse, StreamReader etc. But for some reasons I need to be able to code the "message". I would explain why but that would just be a diversion...Anyway the problem is that the packet gets saved in its native form but I need to be able to save the packet to the actual file without the header and etc. The sample code is in the second code tag.
My.Computer.Network.DownloadFile()
Dim server As String = "download.utorrent.com"
Dim mySocket As Socket
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Jul 8, 2010
In a Windows Form application I have a Form with a UserControl that contains a child control. I have an event handler for the child control's Validating event. On the parent UserControl I call the ValidateChildren() method. But the event handler for the child control's Validating event does not run. The CausesValidation property is set to true on both the parent UserControl and the child control. Is there any reason why the Validating event handler would not run?
The child control is a custom control derived from Panel. It contains two RadioButton controls, both of which have their CausesValidation property set to true.
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Feb 6, 2010
I've created a control class that inherits a Panel control. This control then contains two other panels, one of which I would like to be an IContainerControl.I know how to turn the entire control into a IContainerControl but have been unable to do the same to a child control. I've tried in both C# and VB.Net and failed with both.
Does that make sense? I tried searching but didn't find anything that helped, hopefully someone here can get me on my way
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Apr 10, 2011
i have created two forms A and B when button in form A is clicked B is invoked when B is running its not possible to work on A until i close form B. How can i work on A without closing B
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Apr 17, 2012
i have three forms
when i click button1 on form1=====> form2.showdialog()
then click button 1 on form2 =====> form3.showdialog
then click button 1 on form 3 =====>
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Oct 25, 2010
I have a single table that holds my Categories
CatID, CatName, ParentID
I have often used this layout to show Root Categories where the ParentID IS NULL. I would like to be able to create a vertical Menu (using a repeater and an <UL><LI> that displays the Root Categories and ideally, a collapse panel that would expand with the subcategories. Given the above Table format, it is also easily possible to make the hierarchy unlimited.
how to make a single dataset that understands the Child relationship.
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Mar 23, 2011
how i can change the native scrollbar style in my application to my custom style. I can adopt a custom scrollbar to attain this purpose but this will not serve my purpose because i want this attribute in entire application. Like it the text in textbox gets longer than its bounds than the scrollbar appers are my custom bar not the formal ones
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Jul 2, 2009
Deploying Winforms Application to Client Machines Application Failing on start
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Mar 9, 2011
I have an application that is written in VB.NET, using the System.Windows.Forms.Form as the front-end GUI. It runs perfectly on my Windows machine however recently there is a business requirement to convert this application to run as a web application so that people could view them in their blackberries when they go to the URL. Is there any quick way to perform such a conversion or I will have to translate the code line-by-line for such cases?
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Feb 25, 2009
I'm creating an application that uses an MDI container to create a sort of desktop style for my form with a group of icons docked to the left hand side. The rest of the form is the desktop area that I want all windows to open in.If I use the standard File-New option that is provided by VB as a default for the MDI container this works fine and a child window is loaded.If I use similar code from one of the icons this also works fine.y problem is that one of my child forms is a search panel and when I double click on one of the results I want a window to open, but as an MDI child. However, this doesnt happen. When I open the window it opens as a completely separate window and isn't docked within the MDI parent. It also appears on the task bar as a separate application.
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Sep 24, 2010
detect whether the current application is a console or a winforms application.The reason that I want to do this is that I am developing a library with a global error handler in it and I need to know what type of application it is in order to be able to subscribe to the appropriate exception event.Obviously I could get the user to pass in a parameter specifying what type of application it is, but I would rather deal with that automatically so its all encapsulated from the user of the class.
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