Prevent Painting Of .NET Form While Form Is Loading?
Jun 14, 2010
Is there a way to turn off all visual updates to a .NET form while I am manipulating it? When my program first loads, for example, I set the tab control to the tab that was last open. The user can see the program switching tabs.
I have looked into SuspendLayout and ResumeLayout, but either I don't understand what they are doing, or I am not using them correctly, because they don't seem to have any effect. Someone told me that there used to be a way to turn off paint events in VB 6. Does this still exist in .NET?
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Mar 3, 2012
I have a form contains NumericUpDown1, TextBox1, TextBox2, at design time i set NumericUpDown1.Value to 4 and TextBox2.Text to 100, and i have this sub[code]...
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Aug 26, 2011
Im Using VB 2008. I have MsgBox() statements in all Mouse & Form Click events to TEST & NOTHING FIRES during Form Load when I click on Form or Button Controls !!! The Form Load event contains code for Displaying the Label.Text control many times with changes in the Text to simmulate annimation.
[Code]...
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Feb 19, 2010
I'm writing a simple paint program in VB 2008 that allows the user to create rectangles using MouseDown event to anchor one corner, MouseMove to stretch (or grow) the rectangle, then MouseUp event to complete the rectangle.The last statement in the MouseDown event is Me.Invalidate() to trigger the form's paint event where all the rectangles are drawn (refreshed).
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Jun 20, 2011
im having a similar problem like the solution here Prevent main form from appearing when showing another form . but some of the suggestions were to minimize the main app so it doesnt show, which i cant do because my main app is supposed to be a desktop to be underneath all other apps to replace the windows desktop. And the second forms are supposed to be sticky notes. so i cant minimize the main window cause it has the user background and other controls. i tried making the parent of the notes a Nothing pointer, a pointer to the desktop, creating the form through a dll but i had no success.My main problem is that when i click a note (form2) form1 comes up, even with form1 having the WS_EX_NOACTIVATE in the createparams. form1 does the form2.show() but they shouldn't be attached.Another reason im having trouble with the solutions preseted in that post is that they are for delphi and im doing it in vb.net.
All i need is being able to click on the controls and write in the note without bringing the main form behind the note. either making them independent, or making the note not focusing the first form or being able to operate the note without it activating. i dont know. my last resource is to attach my main form to the desktop but i've heard is the worst thing you can do because it can cause problems hanging the system.
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Aug 25, 2009
I'm trying to create a shaped form with an attractive shadow effect by painting progressive alpha blended layers underneath the main visible form area (a background mask color has also been set to allow a shaped form). This is going well, but I have one major problem to resolve - the bottom shadow layer does not appear as the correct transparent shade - it always appears solidly as the background color / transparent mask color for the form.
Why does this bottom shadow layer not show up as transparent, and why is this color being shown when it is set as the transparency key for the form (and so should be invisible anyway)???[URL]..
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Aug 29, 2011
I have 2 forms. When a user clicks something on form1, form2 pops up. After user is done with form2 and closes it (where the dataset is updated), I want form1 to "reload" the dataset to reflect changes made in form2.
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Apr 26, 2011
I want to prevent from resize of form. I set false MaximizeBox and I set FormBorderStyle to FixedSingle. I couldn't change the MaximumSize of form at runtime. If the user double click on the Tiltebar of the form the form resized. I couldn't prevent that
Then I write the following code at size changed event
If FormLoaded Then
Me.MaximizeBox = True
Me.WindowState = FormWindowState.Maximized
Me.StartPosition = FormStartPosition.WindowsDefaultLocation
Me.Size = InitialSize
Me.MaximizeBox = False
End If
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Sep 12, 2011
I've got this little 'Sticky Notes' type of application and the form I have is a borderless, taskbarless form and for Windows 2000 compatability I'm using VS 2008 and targeting the 2.0 framework. One of the hurdles I have is that in XP, Vista & 7 when you click the Show Desktop button all of my note's windows get minimized and without a taskbar icon, it's not easy to get them back (at least not for a normal user) & I'm looking for a way to either right after the windows minimize I just have them all show again or if I can skip the minimizing message in the wndproc altogether
I've put together a test app that'll show the messages in a listbox for the form, but I'm not sure how to go about skipping sending the message to the form's base class. Here's a snippet, listMessages is the listbox on the form[code]...
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Dec 17, 2010
I am using the printform object from the powerpack, I have a form that I want to print and take up the whole page when it is printed. To do this i have to resize the form and then print it.. then take it back to the orginal size.
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Mar 10, 2009
When I run my VB.NET Winforms app I do not want it to steal the focus from the other open apps. FYI, my app is started from the command line but that shouldn't make a difference. I've seen question 577076 but that doesn't seem to work.
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May 25, 2009
How would i go about stopping a form from being moved. I have the form border style set as FixedSingle and would like to keep it this way because it looks good in vista :)
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Sep 12, 2011
I've got this little 'Sticky Notes' type of application and the form I have is a borderless, taskbarless form and for Windows 2000 compatability I'm using VS 2008 and targeting the 2.0 framework. One of the hurdles I have is that in XP, Vista & 7 when you click the Show Desktop button all of my note's windows get minimized and without a taskbar icon, it's not easy to get them back (at least not for a normal user) & I'm looking for a way to either right after the windows minimize I just have them all show again or if I can skip the minimizing message in the wndproc altogether that'd be great.
I've put together a test app that'll show the messages in a listbox for the form, but I'm not sure how to go about skipping sending the message to the form's base class. Here's a snippet, listMessages is the listbox on the form:
Private Const WmSize As Integer = 5
Private Const SizeRestored As Integer = 0
Private Const SizeMinimized As Integer = 1
[code]....
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Aug 23, 2011
I am using MDI forms and I would like when a button is clicked, if the form is already open. it just puts it on top instead of opening the same form again.
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Sep 22, 2011
How do I prevent a child form from moving down and across each time it is opened? I want it to always open in the extreme top left.
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Jul 13, 2009
i have a form that needs to be maximized in vb.net. i dont want the user to be able to change its size or move it around.
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Jul 29, 2010
I need my program to open just one instance of each form, and if the person clicks again on the button that opens a form that is already showing, the form should only be brought to front (probably with the "bringtofront" method). How do I do this?I tried checking if the form "is nothing" before showing it, but if I close it and then try to open it again it doesn't work.
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Oct 10, 2008
I seem to be having an issue with my form's background overlapping.I have two forms. One form is called the "mainscreen" and the other form is a small bar at the bottom of the mainscreen form, which shows different labels on a set timer interval.Anyway, the mainscreen will soon have a system in which it also runs different screens on a set interval. However, I seem to be having issues with the mainscreen already. I have set it to load a background image, using this code:
Code:
Me.BackgroundImage = New System.Drawing.Bitmap(My.Resources.image1)
[code]......
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Sep 21, 2009
I wrote a small bit of code to prevent multiple instances of my program from being loaded. Here is the code.
[Code]...
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Jun 22, 2011
I am working on a project where i have a home form which has two buttons for login for employee and administrator.after clicking on button login form will open,but i want as soon as login window opens d previous home form must be closed or hide..also there is link on login page for home,but as soon as user click on home link new instance of home form is opening,hnce i want to stop dis multiple opening of the form.i tried close() and hide() but no use.[code]...
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Jan 7, 2009
I have the following settings:
ControlBox : False
WindowState: Maximized
Because I want the user to have a full screen application that they cannot close without using my Exit menu. The problem is, they can simply grab the title bar of the form and drag it, exposing the desktop!
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Dec 23, 2010
i have two form 1 is maximize and the other 1 is small type kinda login system..and i dont want the user to click the main form, it will access the main form if he types the correct info on login form..
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Jun 5, 2012
I'm trying to make it where you can click make a dialogbox lose focus until you input the requested information. I'm trying to create an effect where if you try clicking on the parent form, it flashes and won't let you activate it. You can see this effect in Windows sometimes when an error box pops up and you have to click 'OK' to continue. How would I go about doing this in VB.NET?
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Nov 8, 2011
I'm trying to make it where you can click make a dialogbox lose focus until you input the requested information. I'm trying to create an effect where if you try clicking on the parent form, it flashes and won't let you activate it. You can see this effect in Windows sometimes when an error box pops up and you have to click 'OK' to continue. How would I go about doing this in VB.NET?
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Jan 16, 2012
Is is possible to prevent a modeless form from losing its focus? I would like to force users to click the exit button of an addin form shown modeless before they wander into the main application. I need to show an user form of an addin modeless, in order to be able to interact with the document of main application. However, I would like to force them to exit this form before going into the main application.
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Mar 15, 2012
I have developed an application in VB.NET. It has 20 forms. All 20 can be opened from a menu strip control. The user should be able to open only one form at a time. How might
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Jul 7, 2004
Is there away to prevent an MDI child form from being auto maximized?
The problem I have is this. I have an mdi application that contains 2 mdi child forms. When I show the first form and maximize it so that it fills the mdi window I can't load the second form non maximized.
Vb.net automatically maximizes the second form despite the fact that I didn't tell it too! If I then restore the second form to its normal size it then does the same with the first form. This is all very strange to me. When you maximize one form inside an MDI window it maximizes them all.[code]...
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Apr 19, 2008
My goal is to populate a ComboBox list when the user clicks it but if the form is not valid I want to capture the event and cancel it so the drop-down doesn't appear (if it's empty).[code]...
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Oct 20, 2010
I am writing an on screen keyboard in VB.NET for a touchscreen. My problem is; how do I keep my keyboard form from getting focus when someone clicks the buttons on it? I have it on top using Me.TopMost That part is working great but I want to leave the current app have focus, not my keyboard. I'm guessing I need to use Windows API functions to accomplish this, however, I have not found any good examples in VB.NET.
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Jan 5, 2010
How could I prevent a Windows Form from automatically docking when the form gets dragged to the left or right side of the screen in Windows 7? This is a neat feature in W7, however, for my form it does not make sense (a data input form). Sometimes I drag the form to the right to read some information on a website and input them, yet, under W7 this form docks onto the right half of the screen when I do so.
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