VS 2008 Initializing Managed DirectDraw?
Jan 23, 2010
I am initializing direct draw by the following:
vb
GraphicsCard = New Device
GraphicsCard.SetCooperativeLevel(Me, CooperativeLevelFlags.FullscreenExclusive)
Dim description As SurfaceDescription = New SurfaceDescription
surface to DirectX
Now the above works fine... for a fullscreen direct draw app...however i want to make a non-fullscreen app... how can i do that?I have tried several things with no avail and i also want the app to keep drawing when it does not have focus?
View 1 Replies
ADVERTISEMENT
Sep 1, 2010
Recently installed Visual Basic Express 2008. Install went fine. If I try to open the toolbox (from any of several locations), a meesage "Toolbox Initializing..." appears in the status bar, then after 15-20 seconds, VBExpress simply closes.
View 2 Replies
Jun 1, 2011
In My application, I have an MDI form. From MDI form I open all forms as child forms. I have implemented IDisposable for all large objects like file stream DB connection etc. In the Form_Disposed event I dispose all unmanaged objects. After the child form is closed, all unmanaged objects are disposed but managed objects (controls and form) are not disposed and still in memory. I find it from .Net Memory Profiler ([URL]).
So I have write code to remove all event handlers of all controls and form. Now, When form closed, dispose is called and all event handlers and controls are disposed, but controls and form are still in memory.
View 2 Replies
Aug 17, 2009
Do both of these algorithm work only with a 128bit size block size?
View 3 Replies
Aug 28, 2009
I'm using DirectDraw to create a (very) simple little movement game... (so far not really a game, but hey, gotta start somewhere) And I'm having a little trouble with my collision detection... ok, it's probably not conventional collision detection, but I'm just learning so far...I have a few surfaces set up etcetc, and have animated a sprite on a tile based background... but the problem is whenever I collide with a certain tile (which I've set as unpassable) from the top or the left, it screws the position of my player immensely... this is quite a headache as I can't seem to see a problem...
ps. Another thing, I can't seem to be able to open my pictures without using the entire directory.
View 2 Replies
Nov 28, 2008
I found a tutorial for DirectDraw online and can get a sprite shown on the screen. Problem is that when I try to make the edges transparent nothing I have tried works. Here is the code
Code:
Public Sub InitializeGraphics()
GraphicsCard = New Device 'This will initi
[code]......
View 2 Replies
Sep 23, 2011
We have a GIS application that has some performance issues. It creates and sends an image to a web browser. We start with a Bing Maps imager, add complex polygons (complete with transparent fill), save the finished image as a PNG, and send it to the browser.
The idea has come up that we could possibly install a graphics card and use DirectX or OpenGL to improve performance. I believe this would be the case even though we ultimately generate an image instead of sending the data the the screen. I believe our processes could still make use of the API and the hardware acceleration it provides. Our process is not unlike what CGI film makers do to render individuals frames of a film, though we simply render a single image and send it, as opposed to the hundreds of thousands of images needed for a single CGI film.
So my question is: would a powerful graphics card and use of DirectDraw or OpenGL provide us a worthwhile performance boost? It can take us 20-30 seconds to render a more complex map. Which is a long time to wait on a web page...
View 10 Replies
Mar 12, 2009
I wrote this - very simple - function, and then wondered does VB have some pre-built functionality to do this, but couldn't find anything specific.
[Code]....
View 5 Replies
Feb 17, 2010
I am writing a WPF application in VB 2008, and need to establish a connection to another system to get pertinent information and if not exit gracefully without displaying the form. I thought I would be able to do this in the Application classwithin Application_Startup and set some custom properties. However, it doesn't appear I can expose these properties outside the Application class without re-instantiation it, which is bad thing. Even variables set up as Friend don't appear to work either.
View 2 Replies
Oct 5, 2011
Why if I run the following code does the argument in the Add method pass {"foo2", "bar2"} in both method calls?
Dim myList As New List(Of String)
myList.AddRange(New String() {"foo", "bar"})
Add(New RandomClass("blah", myList ))
[CODE].....................
View 4 Replies
Jul 24, 2009
i have an application which i want the user to have access to forms base on their access right. I have a public module that that take care of the uers access right, but when I call this module from the form load event which return true(user has access to the form) then form load continue OR false(user dont hav access to the form) exit sub to discontue form load. but this is not stoping the form from loading.
'Check for user's permission
pubFormID = 107
'Call procedure
[Code].....
View 1 Replies
Jul 25, 2009
what the syntax is for initializing a list of a class, eg:-
Public class myparams
private myno as integer
private name as string
end class
[code]....
View 1 Replies
Nov 21, 2011
I am working with a third-party COM component (i.e. do not have its code). The method in question has the following outline:
HRESULT GetTableInfo(
[in] BSTR bstrTableName,
[in,out] SAFEARRAY(BSTR) bstrColumnTitles,
[in,out] SAFEARRAY(long) lColumnPos );
I have tried to pass a ref to a fixed-size array ((Array)string[6]) and to a List.ToArray(), but it keeps crashing on me. E.g.
Array arr1 = (Array) new string[500];
Array arr2 = (Array) new int[500];
table.GetTableInfo(filename, ref arr1, ref arr2);
To be more specific: I already tried any value for the size (the correct one should be 44). Tried the same for the capacity of a List<>, but that didn't help either. I also tried different types, but it does not accept any other than int.
I don't know why it keeps crashing on me with a general error of that COM component (basically indicating that something is wrong, yet not saying what exactly), since I can confirm that the following VB code works:
Dim TitleList() As String
Dim PositionList() As Long
Call objTable.GetTableInfo(txTableFile.Text, TitleList, PositionList)
View 1 Replies
Nov 12, 2011
Here are the facts: Consider the following program. Sub Main()
[Code]....
Compiling the program in Visual Basic Express produces no errors. However, if the program is imported into the Excel Developer environment; I get the following error: Expected: end of statement with the equal sign highlighted. A side comment: About eight years ago, I wrote a Visual Basic simulation program to study financial trends. I found that version of Visual Basic user frendly! I find the 2010 version very difficult for doing simular projects.
View 2 Replies
Jun 8, 2011
I use the splash screen of the vb.net found on windows form.Is there a way that i could put an initializing while my splash screen is running?like other programs do instead of progress bar.
View 16 Replies
Sep 27, 2011
I'm using a structure to hold three arrays:
structure myStruct
dim arrayOne() as char
dim arrayTwo() as char
dim arrayThree() as char
end structure
But how do I go about setting them a value, I've got my instance of myStruct
dim aStruct as new myStruct()
If I try redim, it just tells me it can't change the dimensions of an array, so how do I got about initializing the arrays with values?
View 5 Replies
Jul 23, 2009
I have a form which i want to prevent from loading during the form initializition. which of the form event handles form initialization in VB.NET.
View 8 Replies
Nov 6, 2009
I have a winforms app that checks user credentials as it starts.If autharization fails I want to close the app.So I have been using the following
Public Sub New()
_CurrentUser.GetuserDetails
If _CurrentUser.IsAuthorized then
[code].....
View 2 Replies
Mar 10, 2011
I'm trying to return an array of strings from a function, and got surprised by an error.
I would have expected this to work, but it produces an error:
Public Function TestError() As String()
Return {"foo", "bar"}
End Function
[Code]....
I guess I'm unclear on the meaning of the {}'s - is there a way to implicitly return a string array without explicitly creating & initializing it?
View 3 Replies
Jan 22, 2010
I tried to initialize a textbox value by using the .Text property
Textbox.Text = 0
But Im getting the error Option Strict On disallows implicit conversions from 'Integer' to 'String'.
View 2 Replies
Jun 23, 2011
My first try was to init performance counters in an array, which didnt work. Then I read up on performance counters and from that reading, the constructors are such that performance counters cannot be put in arrays. What does one do for multiprocessing?
View 6 Replies
Jun 20, 2012
Wasn't exactly sure how to word the title of the topic the best without making it a really long title, so I just stayed with a brief general topic to lure you guys into it .Anyways, I am using VB.NET and I have a PictureBox inside a panel that is not initially visible. Whenever a user clicks a button, I set the panel to visible, and I use Direct3D9 to render to the PictureBox but it does not work right when I set the panel to visible. I added a PictureBox_Paint function to handle the Paint event, but nothing. An interesting thing is if I sleep for about 1 or 2 seconds after I set the panel to visible and before I draw the picture with DirectX, it will draw it on. So it must be something when it is first setting it to visible that is affecting it. I do not have an actual image inside the picturebox, I am just using it to draw with DirectX.I'm not exactly sure what events are called right when you set the picturebox to visible.
View 6 Replies
Sep 4, 2011
It has been way to long since I have been involved in VB so I need some help here. I have the following in my C# code
[Code]...
View 1 Replies
Oct 4, 2010
Is there a way to have a class collection of inherited types be initialized? For example, here is my code:
Public Class CamryCar
Property Name As String = "Camry"
Property Color As String
End Class
Public Class RedCamry
[Code] .....
I prefer this one as I don't have an extra property to deal with. But I can find a way to initialize that that list with objects of RedCamry and BlueCamry. Is it impossible or is there another way to do this?
View 3 Replies
Jan 20, 2009
In VB.Net is there any difference between the following three ways of initializing object variables
Method 1
Dim commandObject As SqlCommand
commandObject = New SqlCommand("MadeUpCommand")
Method 2
Dim commandObject As SqlCommand = New SqlCommand("MadeUpCommand")
Method 3
Dim commandObject As New SqlCommand("MadeUpCommand")
Is one more efficient than the others, or are they effectively all the same?
View 3 Replies
May 3, 2010
What's the advantages of the above types of dll? Is there any other type?
View 1 Replies
May 12, 2011
I am writing classes in VB.Net (both managed). The main class "A" creates an instance of "B". Class "B" must call a method of Class "A". I need to know two things (syntax, etc...):
1. How does class "A" tell class "B" what method to call?
2. How does class "B" call the method?
The method must pass back an array of Shorts (in this particular example), either as a return value, or as a ByRef argument.I don't want to use an event if I don't have to. The execution is timing critical. (I assume event handling involves a lot of overhead by the operating system, but I may be wrong.)
View 1 Replies
Jul 26, 2010
I've got some code that looks like this:
If ediFileGroupAbbr = "NIPDSINV" OrElse ediFileGroupAbbr = "WWPDSINV" Then
Dim p As New PrivateBillingAdapter_ForN(ediFileGroupAbbr, businessLocationID, mode, EDIJobItemLogID, BusinessUnitID)
Return p.ProcessEDI(True, False)
ElseIf ediFileGroupAbbr = "FOPDSINV" Then
[code]...
to which I'm passing in a value of ediFileGroupAbbr = "FOPDSINV". But the code is executing as if it's dropping into the third condition (p is a PrivateBillingAdapter). So I've stepped into the code and, sure enough, it drops into the second condition. BUT, if I step into the execution of the constructor, the debugger jumps to an odd place in the code - sort of the middle of a method and not on any actual line of code.A couple clicks and it hops back out of the constructor, still in the second block of code. But if I mouse over the variable p to see it's type, boom, its a PrivateBillingAdapter (from the third block).Like I said, something is clearly wrong but I don't know what. I've tried rebuilding several times but with no new results.This is VS2003, framework 1.1 with VB.NET.
View 1 Replies
Mar 26, 2012
I am creating a desktop application in vb.net by using visual studio 2008 and using ms sql 2008 as back end for my database.As I am creating application on my own system I know my connection string and I have created database manually on my system.
What I want is, when user install application on its system, the database created dynamically at that time on his system and he must enter server name, username and password for ms sql server that application should store for future use.If not at installation, it should atleast check and create database, everytime the user open the application.
View 2 Replies
Sep 30, 2011
Beginner question. How come I can do this:
Public Class Form1
Private StudentsInMyRoom As New ArrayList
Public name As String
[code].....
View 2 Replies
