Hook Into Scroll Event?
Dec 4, 2009I have an app where I need to hook into a particular control's horizontal scroll event. I'm not real experienced in hooking into Windows events.
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Making A DataGridView Horizontal Scroll Event Scroll Another Control
Aug 5, 2011I have a DataGridView with a panel above it, that contains a group of textboxes above each column. My DataGridView has a horizontal scroll bar. What I want to do is when the DataGridView scrolls horizontally, scroll the panel with textboxes above it, so they stay aligned.I tried handling the DataGridView's scroll event, but I'm not sure what to do with it.
View 1 RepliesEvent Hook During Construction - Use Withevents If There Is No Benefit?
May 12, 2011I must say personally, the WithEvents system is, shall we say, open to extreme false sense of security, so to speak. I like a lot of automation in my code, and tend to provide ways to do things manually, with a "default" behavior encoded. However, as I have just discovered, the withevents doesn't HOOK the event delegate until after creation. So even when you do New MyObject(), if an event is triggered during the Sub New() process, the delegate hasn't been assigned yet, and thus the event (which in my current situation is extremely important) never triggers. which begs the question the point of the WithEvents other than removing "AddHandler" lines from procedural code. Sure it saves on typing, due to code completion, but if that's it, that isn't much of a benefit. One would think that using the WithEvents would allow me to do:
PUblic Sub New()
MyBase.New()
RaiseEvent MyEvent()
End Sub
Tragically, this does NOT work, which royally screws up my lazy loading techniques and other such tricks that were supposed to make my code simpler to use, and instead has made things 10 times more complex, as I have to specifically alter class initialization sequences to be outside of class instantiation. (which should be one in the same, imho).Jaeden "Sifo Dyas" al'Raec Ruiner
"Never Trust a computer. Your brain is smarter than any micro-chip."
PS - Don't mark answers on other people's questions. There are such things as Vacations and Holidays which may reduce timely activity, and until the person asking the question can test your answer, it is not correct just because you think it is. Marking it correct for them often stops other people from even reading the question and possibly providing the real "correct" answer.
Disable Scroll Event Of Listbox After The Keydown Or Keypress Event?
Apr 9, 2010Programming language is vb.net
View 1 RepliesHook Up An Event To Another Event?
Nov 10, 2009Is it possible to hook up an event to another event in VB8?I have this code in C#...
public event ShowAboutDialog = delegate {};
private void hookupEvents() {
myButton.Click += ShowAboutDialog;
}
And am trying to convert it into VB8, but can't get it to work..
Public Event ShowAboutDialog As EventHandler
Private Sub HookupEvents()
AddHandler AboutMenuItem.Click, AddressOf ShowAboutDialog
End Sub
Scroll Event Goes Wrong
Nov 20, 2009Scroll Event goes wrong.I have this [code]...
View 2 RepliesWhat Is ListBox Scroll Move Event
Mar 15, 2012what is the code of if scroll bar of listbox move i
somethins like this ?
if listbox1.scrollmove then
textbox.text=""
end if
DataGridView And Scroll Event - Row Index Not Being Updated
Oct 26, 2010I have a datagridview which I am populating of a database, scrollbars are disabled to allow for autoresize
I created a Scroll Event that causes me some issues:
1. I can scroll down only
2. To move from one row to the next I need to rotate the mouse-wheel up in between two rows - as if the row index isn't being updated
3. The procedure results in an error : Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
Public Sub grdScroll(ByVal sender As Object, ByVal e As ScrollEventArgs)
Dim RowIndex As Integer = grdAccountTypes.CurrentRow.Index + e.NewValue
' grdAccountTypes.CurrentRow.Index = grdAccountTypes.CurrentRow.Index + e.NewValue
grdAccountTypes(0, RowIndex).Selected = True
[Code] .....
Forms :: Listbox Horizontal Scroll Event?
Oct 20, 2010So I have a custom listbox that is displaying garbage text when scrolling horizontally. I need the custom listbox to stop an annoying flicker, but it's causing issues with the scroll. I think I could solve the issue if only I could access the hscroll event, but I don't know how to do that. I will put down my custom listbox class just in case you will need it to understand the problem.
Edit: I realized my question is a little vague - telling me how to access the hscroll event within the listbox will suffice
Public Class DoubleBufferedListBox
Inherits ListBox
Private resizing As Boolean
[Code]....
Mouse Scroll Up And Down Event Is Not Triggered On Picturebox?
Nov 15, 2010I have a picture box in my form and now I want to add an event so that if the mouse is scrolled up the scale of the picture box gets larger and when the user scrolls down the size off the picture box gets smaller. This way I want to make a zoom in and out effect.So now i have the following code in the mouse wheel event of the Picture box:
If
e
.
Delta
>
[code]...
But somehow this whole mouse wheel event isn't fired.
.net - Scroll The Items On The Listview On The Event Of A Button Click
Apr 29, 2010I want to scroll the items on the listview on the event of a button clik.is there any funtion on .Net(Windows Application) for this?
View 3 Replies2005 - Horizontal Scroll Event Not Working Properly
Jan 7, 2011I am developing windows application in visual basic .net 2005. I am using datagridview and i want to handle its horizontal scroll event. i was using code below,
[Code]...
DataGridView Merge Column Header And Scroll Event
Jun 10, 2011I have a custom datagridview. I have to merge the 1st to 5th column header of that grid.I have handled Paint, Scroll and ColumnWidthChanged event as the following code:[code]
View 7 RepliesTwo Textboxes - Scroll Event To Trigger Change Of Position Of Scrollbar
Mar 23, 2012I am currently working on a VB.Net program where there are two parallel multiline text boxes like this.
----- -----
| | | |
| | | |
----- -----
I would like that when one text box is scrolled, the other is scrolled as well. I was wondering if there was a Scroll event that could trigger the change the position of the scroll bar of the two text boxes.
Conflict Between Paint And Horizontal Scroll Event Handlers In Windows Form User Control
Feb 7, 2011The following zipped up Visual Studio Solution on Skydrive is immediately buildable and runnable; a usercontrol on a Form. Problem? If you click on any of the Edit Buttons and move the Horizontal Scroll, the values as they change in the Label_Values are off by one when you release the slider button. I think this is a timing problem between the Paint handler and the Horizontal Scroll event handler at the very bottom of the User Control code. Sorry I didn't eliminate
View 2 RepliesTab Control Scrolling - Middle Mouse Wheel Doesn't Scroll The Scroll Bar
May 22, 2012I have a tab control with two tab pages. One page has the auto scroll enabled since there is to much content in the page. The middle mouse wheel doesn't scroll the scroll bar; I have to actually click and hold the scroll bar and drag it down to scroll. Is there a property to allow this?
View 2 RepliesHorizontal Scroll Control - Using It To Scroll A Series Of Panels Across A Form?
Nov 11, 2010I am having an odd problem with the Horizontal Scroll Control in my program.I am using it to scroll a series of panels across a form.This is my code:
Private
Sub scrHoriz_Scroll(ByVal
sender As[code]....
The problem is that this works perfectly if I use the left and right arrows and it also works perfectly if I use the scroll bar's slider SLOWLY. If I scroll using the slider and move it quickly then the scroll gets out of sync.The small change and large change are both set to 1 and maximum is set to 8
VS 2010 Panel Auto-scroll Will Not Show Vertical Scroll Bar?
Jun 12, 2011I am loading several command buttons into it (one in each grid box). I have the panel set to autoscroll. When TableLayoutPanel is set to AddColumns, all works well. However, I dont want horizontal scroll, I want vertical. When I set TableLayoutPanel to AddRows, a vertical scrollbar will not appear.
View 4 RepliesLeave Vertical Scroll Position As Is And Scroll All The Way Left?
Jan 6, 2010How would I leave the vertical scroll position as it is and set the horizontal scroll position all the way left if it isn't already in that position? I've been using Me.AutoScrollPosition and have come up with code that is satisfactory but I haven't been able to always leave the vertical scroll position exactly as it is and just move the horizontal scroll position to the left limit.
View 4 RepliesUse 'scroll Bar' Option On Textbox To Show Vertical Scroll Bar
Mar 13, 2010I have a textbox that shows events on a program, which I add. I use the 'scroll bar' option on the textbox to show the vertical scroll bar, but how do I make it stay at the bottom most possible? I am using this code while I am trying to learn how to do what I want the scroll bar to:[code]But how do I get it so the scroll bar will stay at the bottom-most it can? I'd like the newest, most recent events to appear at the bottom of the textbox, and to have the user not have to scroll down every time something new is added.
View 2 RepliesScroll Bars Not Long Enough To Scroll Panel Far Enough?
Aug 19, 2009i have 2 controls on a form. Panel1 and picturebox. I am using the following code to zoom in.
PicBox.Width = PicBox.Width + 100
PicBox.Height = PicBox.Height + 75
'PicBox.Left = PicBox.Left - 50
'PicBox1st.Top = PicBox.Top - 20
i am also using the following code to try and scroll whilst zoomed in
Inherits System.Windows.Forms.Form
Private m_PanStartPoint As New Point
Private Sub picbox_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PicBox.MouseDown
'Capture the initial point
[code]....
I have set the panel to autoscroll and added scroll bars but they do not scroll far enough... They only scroll about 2cm.
When Mouse Scroll The Datagridview Will Scroll Following Horizontal
Dec 10, 2009Following default the datagridview will scroll following vertical. How can i do that. I tried :
DataGridView1.ScrollBars = ScrollBars.Horizontal but not work
VS 2010 How To 2nd Hook
May 30, 2011almost perfectly works to disable specific keys. but 1problem. for example : checkbox1 checked and then press button1 L win key disable its okey.but then i press button2 to active keys and press again button1.this time not working disabling keys.
[Code]...
Hook For Process Start?
Feb 10, 2010Is there any way I can install a global hook or something else on the start of external process. WH_CBT hook, as it appears can only intercept events for processes that have windows, but what if I want to intercept the start/stop of a windowless application or a windows service? Is there any way to do it using .NET?Generally, I want my application to receive a notification of some process being launched knowing only an executable name.Presently I simply use a timer to iterate through running processes, but I wonder if there a better way to do it?
View 4 RepliesHook Keyboard With Program?
Jul 14, 2011I want to hook keyboard with vb , so that whenever my application written in vb runs it will capture all the keys pressed from the keyboard and show all the keys being pressed in a textbox on window's form
View 1 RepliesLow Level Mouse Hook In VB
Aug 4, 2011I want to hook low level Mouse hook in vb, and after that I want to save the X-axis, Y-axis and clicks(Right/Left) into database for later use or automation..But I don't understand that how should I save the X-axis, Y-axis and clicks into a MS SQL databse and later retrieve them?
View 2 RepliesLow-level Keyboard Hook
Dec 18, 2009I'm writing a code to use it in a keyboard spy program , and I'm using hook techneque with this , but the problem is that : if I ForExamle clicked on Shift and number 2 it doesn't give me At (@), I want it to give me at (@) ..
[Code]....
Using .Net To Hook Excel Events?
Jul 27, 2010I'm trying do capture the Excel event Sheet_Activate and put some information in a list box control. I can capture the event, but when I try to add some information in the list box controle, an error message is showed. Here is my code:
Imports Excel = Microsoft.Office.Interop.Excel
Public Class WorkbookInfo
Private WithEvents _ExcelApp As Excel.Application
[code]....
Why Can't Hook Notepad On Vista 64
Nov 21, 2008url...This example works on a my 32 bit XP machine, but it does not work on my Vista Ultimate 64 bit machine. The example is supposed to hook notepad so that whenever I type a character in notepad, a text box recieves the same character. This works on XP, but on Vista 64, nothing happens.I should probably say that when I first ported the example to Vista, I ran into 2 problems, which I think I correctly fixed.
1. I was getting a BadImageFormatException when the DLL was first trying to be accessed. I fixed this by setting the target platform in the VB project to be x86.
2. I was getting a DllNotFoundExeception, so I placed the "MainHook.dll" file in both:[code]I have a couple of theories, but I'm a bit of a beginner when it comes to hooking. Could this be happening because Notepad is a 64 bit application and the hook is written in 32 bit? I have the express version of VC++, so I can't create a dll targetted to 64 bit, so I haven't tried that.
.net - Mouse Hook In .NET And Windows Forms?
Nov 15, 2009I have a form that is displayed, not by ShowDialog, but by setting its visible property to true. This is so it behaves like a dropdown.The form installs a mouse hook, using SetWindowsHookEx(WH_MOUSE, ...).
I detect if the mouse is clicked outside of the dropdown and if so, return 1 in my HookProc method and close the dropdown.The strange thing is, if I click outside of my drop down on to a textbox, the textbox still receives the mouse click, after my dropdown closes, even though it's been handled by my HookProc method.It gets stranger... If I click on a label or button, they do not receive the mouse click, as expected, after the drop down closes!
[Code]...