Hello, I try to use the mousewheel in a user control to to scroll in a pannel where I draw with GDI+ . due to the fact that a pannel don't has focus, I have no mousewheel event at my dispositon. Is there a work around? Someone has an idee? tnx in advance. Jean Paul ...more >>

why doesnt this work???? DataGridCell newrowcell = new DataGridCell(dataGrid1.CurrentRowIndex,0); dataGrid1.CurrentCell = newrowcell; If I use the integer 1 instead of 0, it works, but that is the second column, I want the focus to be on the first column, however this piece of code app...more >>

Hi, Creating instances of a control I have a panel with some controls inside and I need to create a Stack to push into some instances of the panel. I mean, there is a button where the user creates a new instance of the panel each time it push the button. Any idea? Thanks, ...more >>

For all of the good work that was put into VS2005, I find it utterly astonishing that the 2.0 DataGrid has exactly the same right-alignment header bug in it that the 2003 version had. Wow. ...more >>

Hi I'm relatively competent at windows forms programming in net 2.0 (VS 2005), however, I've never really gotten my hands dirty with exception handling until now... My application is using a startup form (not a sub main) for a windows forms project, with application framework enabled. ...more >>

i'm trying to embed multiple program icons in my executable. the only way so far i managed to do that is to embed native win32 resource file with multiple icons. it works, but... when i create a native win32 resource file with the VS 2005 and put there my icons, VS always converts some of the 32...more >>

Hello, i know how to get a simple keyboard combination, but how to detect a combination of keyboard combination, pressing STRG+N and P? This does not work: private void MdiParentForm_KeyDown(object sender, KeyEventArgs e) { Debug.WriteLine(e.KeyData); switch(e.KeyData) { ...more >>

What method is considered the best way to ensure users enter the correct data in a text box if you want an integer or decimal? ...more >>

What is the difference between a "user control" for Web Forms vs. Windows Forms? I have extensive use of user controls (.NET 1.1) in Web forms. Just wondering how they differ for Windows Forms. Thanks. ...more >>

Hi, I'm trying to create an project running in a dual display environment. My application instantiate a Windows Form on each monitor, and that works great. However, I need to use DirectX and thereby I need to figure out, which display adapter the form is running on. Until now that hasn't be...more >>

In my application, we have some windows that are auto hidden at start up. My intention is to use a menu item to show them, just like that way Visual Studio does with Toolbox, Solution Explorer etc. How can I programmatically show an auto hidden window ?. Any help is highly appreciated. Than...more >>

While testing one of our applications, I found some interesting behavior with the Button click event using .NET 2.0. Let's say we have a windows form with a button on it. When the user clicks on the button, the button disables itself (to prevent the user from clicking again), does some pro...more >>

Is there anything similar to "Error" event of System.Web.UI.Page of Webforms in a Windows Forms?? I want to catch all errors occured in a windows form? I already know there is Application.ThreadException but that is on application level. - angi ...more >>

Using C# I want to be able to select the last VISIBLE row in the datagrid. When I try to do this using the datagrid.select method it tells me my index is out of range. How can I programatically select the last VISIBLE row (which has no data in it) to allow the user to add it leading to th...more >>

In hunting down a problem I created a simple form. Public Class Form1 Private mOne As TreeNode Private mTwo As TreeNode Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load LoadNodesA() 'LoadNodesB() ...more >>

Hi Techies, I have added datagridview in my windows application, i have set the Column header color to some color, but it is not reflecting the color whatever i set there.Its just showing the color "Control".I am using Win XP OS, But the samething is working perfectly in Win 2000 Prof, ...more >>

Hi all, Can .NET applications run on Windows 98? My other question is how a .NET application runs from a network. Is this statement correct? When a .NET application is run from a network, Microsoft’s ..net framework software running on the user’s machine will copy the software into the...more >>

How do I set a form's MdiParent property to the MdiParent when it is NOT created by the MDIParent? For example, frmMain creates frmA, frmA creates frmB .. how to make frmMain the MdiParent of frmB? private void btnAddNew_Click(object sender, EventArgs e) { frmB frmB = new frmB(); // thi...more >>

How I can add auto online update feature to my windows application which basically is a smart client. I already had a web service which will tell the latest version and download URL. Now how can I make my application to do that? I am using .NET 1.1 C#. - angi ...more >>

There's a vb.net 2005 windows app that sends out emails, it works fine, but sometimes it gives these errors: 1)System.Runtime.InteropServices.COMException (0x80040212): The transport lost its connection to the server. 2) System.Runtime.InteropServices.COMException (0x80040213): The transp...more >>

All - I have a form with a tab control. There are 9 tab pages with various data bound controls on each. I was thinking of moving theses to seperate usercontrols and then adding the control to each tab page. I haven't conceptually grasped how to handle the data part though. Should I pass a...more >>

Hi, I need to suppress displaying DropDownItems of a MenuItem. I thought MenuItem.Enabled=false might do also this except disabling the MenuItem, but it didn't. Any ideas? With regards Paul Jones...more >>

Hi, I have an application with a DataGridView that displays a Questionnaires questions and allows a user to fill in answers to these questions in the gridview. Each question knows its questionType (Date, Text, or Yes/No/Na). I have created a custom column that inherits from datagridview...more >>

Hi, I need to know when user cancelled adding a new row to the DataGridView. Is there a way how to do it? I explored the DataGridView events but failed to find any usable one. The thing is I need to do something when user adds a row to the DGV. This is done in the DGV_UserAddedRow. In case us...more >>

Take one DataGridView, add one column that contains cities, add another that contains countries, add another that contains locales (states, provinces, territories, etc.). Now, make the Country and Locale columns ComboBox columns, and bind the Country column to a Country BindingSource and the L...more >>

Hi, I have done some coding with UI being accessed from different threads before. But now I stuck. Need your help guys! :) My application run not the form but some ApplicationContext class (in function Main - Application.Run(new MyAppContext());) That class creates 2 children. Model1 a...more >>

With vs2005 I created a simple form. New Project->Windows application(c#)->added a button on it-> set FlatStyle="System" Running this simple program on windows 2003 the button is selected and I see the dotted line around the button. The same program under windows xp pro (italian) selects th...more >>

In windows application, I am binding a dataset to a combo box. How do I add a default “-Select-” value at the top. ...more >>

I am trying to detect if F3 is pressed to mimic the typical "find next" scenario in a RichTextBox. The function keys do not seem to cause a key press event to occur. How can I detect that a function key has been pressed? Thank you. Kevin...more >>

Hi all, i am currently writing a small application which involves two forms. Form A is used primarily for display purposes while form B is used to gather user input via a number of textboxes and numeric updowns. The situation now is that when the user keys in his/her input to form B and ...more >>

I am using System.Windows.Forms.PropertyGrid to display the properties of some custom objects. To enable dynamic modification of those properties (and its attributes) this class hast to derive from ICustomTypeDescriptor. Now I want those objects to be marshalled (by reference) across process bou...more >>

Hello, I am developing an apllication in which i want to change the values of datagrid checkbox column according to parameter passed to the query. But the problem is that, at first time when i usedto send the parameter values it shows me the result ok for first time.But as i change the value ...more >>

I'd to create combobox that can display multi-columns when user click it. Thx, Saroeurn ...more >>

How to raise an event of button (click event) from textbox's onkeydown event? I have a button which have or not a click event and a textbox which have onkeydown event. I want add some feature on textbox such process input '*' character will raise click event of a button. which function ...more >>

Hi All, I am creating a setup for a windows application in VS 2005. Now I want to customise look and feel of all the installation steps screens. But VS 2005 seems not to provide this feature. This only allows to change the baaner bitamp and some selected text strings. How can this be achiev...more >>

Using dotnet 1.1. Say I have assembly "A" with a drived textbox like this : public class MyTextBox: TextBox { public MyTextBox(): base() { this.BackColor = System.Drawing.Color.AliceBlue; // XXX } } Assembly "A" is compiled. Say I have a windows form in application "B"...more >>

I have a Windows Forms app that let's a user type the path to a file into a inputbox. What I'd like to be able to do is, if the user sets an association between a particular file type and my application in Explorer, I'd like to be able to pre-populate the inputbox on Form Load with the name of...more >>

I'm using WM_QUERYENDSESSION (&H11) but need to also close my app when the Uninstall is initiated -- what message value do I need to check? Thanks, Rob. ...more >>

Can any one please help me out. I need to add a in place tool tip on a list view items. Do any one knows how to achieve this? - Angelina ...more >>

Any suggestions on how to make a form not visible when displayed via Form1.ShowDialog() ? If I put a button on the form called "Close" and in the click event I put Me.visible = false, the form closes and my application terminates. I don't want this, I just want it to hide (Me.Hide is the s...more >>

I would like to implement some general search capabilities within a rich text box. First I was wondering if there is available a dialog like you get from Ctrl-F (find, find next, etc.) Do I have to code my own dialog or is this search dialog available for reuse? Thank you. Kevin...more >>

The alignment on my tab control is set to Bottom (so the tabs are on the bottom) but the default painting of the tabs is still as if they where on top. I am assuming that it is already pretty well document on how to override the OnPaint to flip things around. Can someone point me to it? Sam...more >>

I have been unable to get the DataReceived event of the SerialPort component to fire. Here is a sample of the code I found on the web that is said to work around a bug in this control, but if the event doesn't fire, I don't see how it can do anything. private void DoUpdate(object s, Event...more >>

Hello, I'm developing an application where the user gets the ability to choose how the form looks like. What is shown, wich controls to use and all available properties of those controls. The data gets pulled from a database. The only problem I have is the speed. When having a form with 5...more >>

Hi, Suppose I create a Windows Form app and then add a public method like this: class Form1 : Form { // Constructors, etc. public void DoSomethng() { } } Now I add a UserControl to the form, add a button to the UserControl and a Click handler for the bu...more >>