I noticed in the Intermediate Window a message which read:A first chance exception of type 'System.Data.OleDb.OleDbException' occurred in System.Data.dll..I do not where in my program it happened. Can someone tell me what this means.
View 1 RepliesRunning through some basic tutorials and wanted the test the value of a variable i have created. How do I go about doing this in the intermediate window??
The only way I can do this is by creating a msgbox and then outputing the string var in the msgbox (var) to get the value I am after. Is there a way of doing this in the intermediate window??
I tried the following. but had no luck...
? ckstatevar
My code is as follows:
Private Sub ckboxDexter_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ckboxDexter.CheckedChanged
Dim ckstatevar As Single = ckboxDexter.CheckState
[Code].....
Is there is any option to send a message to a window to "press" on the maximize button? I thought using the sendmessage API but I don't really know how, I alreday got the window handle, the problem is how to send the message?
View 2 RepliesIn VB one can easily do this to bring up a Message box:
MsgBox("Hello")
How to achieve the same in C#?
I want to learn visual basic, what book or books are the best to take me from beginner to intermediate?Would it be more advantageous to go through VB 2008 or VB2010 tutorials first or should i start with a book before going through VB2008 or VB2010 tutorials?I am comfortable with Sequel (SQL) language, learned on the job and am at the advanced level of Excel/Access writing formulas functions,etc. the next logical step is to learn VB.
View 6 RepliesI have an Vb.net application made by a third party , that I need to control using outside resources from a simulated environment and must not interact with the desktop. To simulate inputs that a user would normally input from a special screen with specific keys around it, I've built a test control library to control it and send the form image to a .bmp. The form cannot be visible and showed in taskbar , the bmp output will be displayed by the simulated environment.Using PostMessage and sendKeys work well as long as I don't but ShowInTaskbar = False for the main form. After many read & testing, I have learned enough to try what seems to be the only thing that would work. I've created a form that I setparent using HWND_MESSAGE parameter, this should create a Message-Only Windows, that are supposed to received postMessage, and subclass it's events.msdn.
I can't seem to get it to work, and I was hoping someone could tell me what I'm doing wrong.I have been testing several different ways found through out the web about .net , and short of going into message thread peek and feed(maybe(may be)my last hope), they all seem to work until I take the forms out of the taskbar.[code]
How to send a message to parent window in VB .Net?In my VB .Net application, there are a few windows which pop up in order.Main form starts form1, form1 starts form2, and form2 starts form3.In form3, I have a button which calls "Jump to Main". Once I click this button,I want to it to close
View 6 RepliesI have a few SQL connected check boxes in my form.The problem is that on the 'Add New' event the check boxes go into a "intermediate" status (filled in).What I would like is for all the check boxes to be unchecked.I have so far tried the following and none of it worked.[code]Nothing seems to help, in fact there seems to be no effect at all on the check box properties no matter what I do (wether I change the property in VB, in the table definition, or programicaly).
View 1 RepliesI've a scenario in which user can make a selection from a grid (having uploaded files on local folder) and when user press "send", application should open Outlook "New mail message" window having selected files as attachments (which user selected from grid).
View 2 RepliesI have an application with a SplashScreen. While loading the application, the application will check certain conditions and if the condition fails it throws a message window. I problem is when the message window is thrown it is displayed just behind the splashscreen and user is not able to see the message and unable to understand whats happening while the SplashScreen is displayed as it is till he clicks ok on the message box.
View 13 RepliesPopup window / message for remaining time
View 2 RepliesI have several froms in my application. When application starts, a timer starts for 30 minutes. I want to show the remaining time using a popup window, message or whatever, on whichever form the user is at that time.
View 1 RepliesI am unsure how to write in message box functions for a pop up window. I need OK and Cancel buttons to display with my message box. The Ok button needs to close the message box and the Cancel button to close the entire program. Here is what I have so far
Public Class Form1
Public scoreA, scoreB As Single
Private Sub txtboxa_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtboxa.TextChanged
scoreA = txtboxa.Text
[code]....
When I attempt to open the visual basic window in PowerPoint 2010 I get the following message:STDOLE2.TBL could not be registered. What causes this and how is this fixed?
View 4 RepliesPublic Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.StaffTableAdapter.Fill(Me.StaffDBDataSet.Staff)
BindingNavigator1.DeleteItem = Nothing 'Clear the default value of BindingNavigator's DeleteItem property
End Sub
[code].....
When I selected a record in datagridview and hit delete, it always deleted the first row in the datagridview then if I tried to delete any of the row again, it would not let me. I would like the selected row to be deleted,how I can do that?
I have a DataGridView that has columns with a value type of boolean.To load the DataGridView, I load values into a DataTable then set theDataGridView.DataSource = theTable What value can I use in the table to load an intermediate check state?
Would it be better to use a check box control with a value than to use a column set to the boolean data type?
The check box is for display only, and will not need to be changed.
I tried a variation of the code at the end of this thread.>> [URL] which is the following code using; one Button one Panel
View 5 Repliesfrom the vb web:
Quote:
The following Microsoft intermediate (MSIL) instructions throw OutOfMemoryException :
*
box
*
newarr
*
newobj
Does anyone knows what exactly does box means? and also is there anyway this statement will cause an outofmemory: Dim a As Boolean
What about if its just an empty object: Dim a As someobj
Btw do you know of any webpage that teaches simple stuffs that a advanced to intermediate student can learn from it like the home and learn? Cuz the home and learn is only the basic stuffs.
View 2 RepliesIn need of some desperate help. Has anyone had any experience with a software product called Pres? The programme provides a function (userhook) that can run externally created dll's as the programme offers no COM support. The basic requirements for the dll are as follow.
1, The dll requires a public function named UserInstruction
2, The UserInstruction must have 5 parameters. The first and second of type long, the third a double array and the fourth and fifth parameters required type is a string.
This all seems pretty simple. But as .NET doesnt support exporting functions within a DLL to allow direct public access to the function through third party software it becomes tricky. After doing some research it seems as though this isn't possible in .NET. The only way I can see to do this is to convert the dll to Intermediate Language and play around with it once this is converted and then convert the IL code back to a DLL. I found this on the following site [URL]..After trying this when I try to use the DLL via Pres I am still getting no joy.
When I run project splashscreen is popup and then Logon window is run. But unfortunately when Logon window is run the splashscreen still open like maximized window and I cannot see Logon window. How to fix that problem?
View 1 Repliescreate a message box that stores my user name, message, and post datetime into the database as messages are sent. Soon came to realise, what if the user changed his name? So I decided to use the user id (icn) to identify the message poster instead. However, my chunk of codes keep giving me the same error. Says that there are no rows in the dataset.
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim name As String
Dim icn As String
Dim message As String
[code]....
how to create an error message by message box to tell the user to enter a number only if they key in a character value?
I MEAN AFTER THEY PRESS THE CALCULATE BUTTON
Private Sub btnCalcFat_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalcFat.Click
Dim intFat As Integer
intFat = Integer.Parse(txtFat.Text)
lblResultDisplay.Text = txtFat.Text * 9
End Sub
My text box is call txtFat
I have another problem regarding send message api cause i didnt find any good info on the net.
First of all Send message has:
Hwnd
Wmsg
Wparam
Lparam
What do those mean exactly ? Hwnd is the main window's hwnd or the child? Lparam and Wparam are pointers? How you get them from an external application? How you set Wmsg to send a string?
just curious if there was a way to make the text in a message box scroll across the message box
View 1 RepliesI have an application that uses SendMessage to send a list of numbers one at a time to a query window in the database we use. The problem is that when SendMessage fills the textbox, then clicks "Query" (hWndQuery) my application freezes up until the query is finished running, which sometimes can take up to 20 minutes depending on the query. Any way to force the program to be responsive after it 'clicks' the query button?
Below is my code - I commented where the program freezes (15 lines up from the bottom):Private Sub Query()
Dim hWndQQ, hWndTextBox, hWndQuery, i, iResult As Integer
Dim sTemp As String
sTemp = ""
bCancel = False
[Code] .......
how do i read my ten key pad to display a message box like when i hit 5 being the middle number (USB Port on my labtop) it bring up a messbox?
View 1 RepliesI'm sending TCP messages (numeric and/or text data) of various length; Approx: Each 200ms a <50 character message, and rarely a 50,000-500,000 character message. I'm trying to find a way to handle these variable length messages, and been advised to have a fixed field at the start of each message that gives the length. So I set a 7-character string that will hold this integer value. A message may then look like this:
0000015DATA|490
Now, I'm still a bit unsure how to finalize this. In any case I guess I need to set an initial buffer size, which in example below is set to 1024. So what if the message is longer than this? Would I need to save the current message parts until the full length has bee received, and keep track of how many characters is left etc? I made an attempt of that in code below. It doesn't give correct result yet, but still;
Const READ_BUFFER_SIZE As Integer = 1024 ' Amount of bytes to read in each chunk (?)
Private readBuffer(READ_BUFFER_SIZE) As Byte
Private _serverIp As Net.IPAddress
[code]....
I had an idea for an MSN (Windows Live Messenger) "addin" today, which I thought was a great project for me to try.Basically, I want people to be able to type LaTeX code in their MSN conversations, and my application parses the LaTeX code and displays (probably in a separate window, but if possible inside the conversion window) the math formula.
I am probably not going to get it to send the image in the conversion window, but I will be happy if I can get it to display in a separate window.Basically, all I need for this to work is to capture the text that a user receives over MSN. If it contains a certain token (like "$$ ... $$") then I can try to parse the text between the dollar signs, and if it is valid LaTeX I can show an image of the result in a separate window.
So, I probably don't even need an actual MSN plugin / addin, if I can just get the received text by some other means.
1. some basic Windows Live Messenger add-in programming examples / tutorials? I've never done this before, and have no clue how to do it... VB/C# are both fine.
2. how to retrieve the text that you receive using either an addin, or some sort of windows API ?
So I'm looking for either an addin, or, if possible, a completely separate application that basically monitors each and every window and sees if it's from MSN, and then retrieves the received text...
Is there any way to click OK on a webbrowser message box? After clicking a button using: WebBrowser1.Document.GetElementById("123").InvokeMember("click") a message box pops up with OK and Cancel buttons. How do I click OK?
View 2 Replies