VS 2010 Get IntPtr Of Object?
Aug 2, 2011This sounds like a silly question, and it may not even be possible, but say I have a MemoryStream in my code. Is it possible to get the IntPtr of said MemoryStream?
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Convert An Integer Of An Object Handle To An IntPtr?
Nov 26, 2009how I can convert an Integer of an object handle to an IntPtr?
View 2 RepliesVS 2010 Image Raw Data From Intptr?
May 31, 2012how to retrive the raw data of the image pointed by an intptr.The thing is the detector gives the pointer to the acquired image and I need to retrieve the image rawdata from the given intptr.
View 1 RepliesVS 2010 Saving A Intptr Array In Structure To File?
Jul 16, 2010i need to save an array of intptrs as a part of a structure in a file, vb.net gives me "File I/O of a structure with field 'pList' of type 'IntPtr' is not valid." error, ok i figured and tried to convert them to integers and while it worked for other singular intptrs it did not for the array as it just throws me a conversion error. I then tried rebuilding the array in the new sub of the save structure and while that sorta worked(i think) it then gives a "bad size" error when saving. Im out of ideas, saving the array elements one by one would be suicide as the amount varies and is well in hundreds,
View 1 RepliesVS 2010 Option Strict On Disallows Implicit Conversions From 'Integer' To 'System.IntPtr
May 20, 2011[Code]...
How do I convert this proper? (Option Strict On)
What Is Equivalent Of IntPtr
Jun 28, 2009What is the equivalent of IntPtr of Vb.Net in Vb6? For example what'll be the equivalent of the following 2 lines in Vb6?
View 1 RepliesC# - Difference Between IntPtr And UIntPtr?
Aug 24, 2009I see everywhere people use IntPtr, is there any reason I should use UIntPtr, instead?
View 2 RepliesConvert IntPtr To Int64?
Sep 24, 2010How can I convert IntPtr to Int64?
vb
Convert.ToInt64(GetForegroundWindow())
error :Unable to cast object of type 'System.IntPtr' to type 'System.IConvertible'.
Converting Any Data To IntPtr?
Jun 2, 2010I have a function that I need to pass data to but the only type of data the function is allowed to accept as a parameter is IntPtr (yep you guessed it, Windows APIs). Would I be able to actually pass anything useful to it? In the case I'm looking at right now it would be a List(Of T) that I need to pass to the function? At the moment I'm resorting to just using a class level object that both the calling method and the function that accepts IntPtr can access, but I would like to negate the need for this if possible.
View 6 RepliesGet A String From An IntPtr From A WPARAM?
May 27, 2009i am using SendMessage to send a message with a LPTSTR in WPARAM from a dll to my vb.net form and i get it by overriding WndProc but the problem is when using Marshal.PtrToStringAuto on the WPARAM it doesn't work, the strange thing is that if i monitor WM_SETTEXT of the form and use PtrToStringAuto to get the string from LPARAM it works, i guess mine doesn't work that's because the dll is loaded by other application.
C++ DLL Proc
Code:
LRESULT CALLBACK CallWndProc(int nCode,WPARAM wParam,LPARAM lParam)
{
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Continue On An Old Respond About System.IntPtr
Oct 18, 2010The idea with System.IntPtr is to represent an integer whose width in bits correspond to the size of a pointer in the hardware and operating system that the CLR is running in, it's platform specific in other words. It supports 32-bit and 64-bit architectures only.This is a legacy from old-style C API's where pointers and ints were frequently treated as interchangeable. The Win32 API has many such parameters, where the width varies with the underlying architecture thus the mess with porting of code from 32-bit to 64-bit (we already did this once when going from 16-bit to 32-bit, funny how we never learn...).In practice, as is mentioned in other responses, it can be used to hold unmanaged resource handles and pointers etc that stem from the underlying Win32 functions. It can also be used to hold integers of the natural size for current platform. You can also use IntPtr.Size to dtermine the size of a pointer on the current platform.SO when you explain this to a child ;) this would be used to let program's flow at the same speed at diffrent kinds of operating systems?
View 1 RepliesError - Value Cannot Be Converted To System.Intptr
Nov 1, 2011I am trying to setup a call back (delegate) in my code for the DirectSound.Notify so I will be called when the sound buffer reaches a certain postion druing play back. My Code is the following:
'Set up call back
Public Delegate Sub NotifyHandler()
'.....
Dim NotificationHandler As NotifyHandler
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Get An IntPtr Pointing To An Integer In Program?
Jul 29, 2009I need to get the address of an integer and assign it to an IntPtr to use in an API.[code]...
View 3 RepliesValue Of Type Integer Cannot Be Convert To System.intptr
Aug 10, 2010I'm trying to get the window of a game (jedi academy) I keep getting this error Cannot convert type 'integer' to system.intrptr This is were its underlined in blue DirectCast(Me.hWndGame, IntPtr),
Imports Microsoft.VisualBasic.CompilerServices
Imports System
Imports System.Runtime.InteropServices
[code]....
VS 2008 - How To Convert Byte Array Into IntPtr
Mar 23, 2010I need to explicitly convert my byte array into IntPtr to pass it to the third-party api. I've been looking through Runtime.InteropServices namespace but didn't find anything suitable.
View 2 RepliesVS 2008 IntPtr And UInt16 In CodeDom Compiler?
Oct 14, 2009Always when i want to create a Executeable and i use the CodeDom Compiler i always get the Error:
The Type IntPtr is not defined
My Compiler Options:
options.ReferencedAssemblies.Add("System.dll")
[code].....
VS 2010 Object Rotation And Move Object With Arrow Keys?
Feb 8, 2011I want to learn how to rotate an object by direction and speed and also how to move an object using the arrow keys?
View 2 RepliesVS 2010 Search Listview: Object Reference Not Set To An Instance Of An Object?
Jan 18, 2011I'm using the following code to try and search a listview (I got it from msdn):
Dim atem As New ListViewItem = ListView1.FindItemWithText(TextBox2.Text, True, 0, True)
If atem IsNot Nothing Then
ListView1.TopItem = atem
End If
Then I got the " Object reference not set to an instance of an object" error highlighting the following line: ListView1.TopItem = atem So then I tried this:
Dim atem As New ListViewItem atem = ListView1.FindItemWithText(TextBox2.Text, True, 0, True)
If atem IsNot Nothing Then ListView1.TopItem = atem End If it still isn't working.
VS 2010 Structure Of Lists - Object Reference Not Set To An Instance Of An Object
Oct 16, 2011I am struggling with the following - I try to add a value to a list, where the list is defined in a structure.
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VS 2010 - Error : Object Reference Not Set To An Instance Of An Object
Jun 22, 2012I get error (Object reference not set to an instance of an object)trying to read a reg key, it stops after the first msgBox which shows MyRegKey value it shows a blank value
Dim MyReg As Microsoft.Win32.RegistryKey = Microsoft.Win32.RegistryKey.OpenRemoteBaseKey(Microsoft.Win32.RegistryHive.CurrentUser, (OldPCTxtBx.Text))
Dim MyRegKey As Microsoft.Win32.RegistryKey
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VS 2010 : Error: Object Reference Not Set To An Instance Of An Object
Nov 18, 2011I have a treeview with a contextmenu. I'm trying to disbable specific items in the contextmenu when the user doesn't have a node clicked, but each try gives me the same error: "Object reference not set to an instance of an object."I tried several methods in the Mouse_Down-event (IsSelected, etc), this was my last:
If .Nodes.Count > 0 Then
If .SelectedNode.Text <> "" Then ' <<< this line is highlighted
enable_expl_mnu() ' enable the contextmenu
[code]....
VS 2010 Error , Object Reference Not Set To An Instance Of An Object
Jul 9, 2010I get the error, Object reference not set to an instance of an object., on:
vb
For Each comboItem As String In My.Settings.ComboBox1
That code is in:
vb
Private Sub Me_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Me.Load
For Each comboItem As String In My.Settings.ComboBox1
[code]....
I am trying to get it to load those settings when the program loads up, VS does not report that program till i attempt to run in debug. Before the program is even loaded that happens.
Unable To Use IntPtr (WindowsIdentity Token) As Input Param On WebMethod (ASMX Web Service)?
Jun 26, 2009We're in a strange situation with a legacy winforms VB.NET 1.1 application using ASMX web services. Trying to send a user Token from a WindowsIdentity object as a parameter to a WebMethod. I will be adding a 'HACK: comment. System.Security.Principal.WindowsIdentity.GetCurrent().Token
The token is of type IntPtr, the first problem is the WSDL being generated doesn't support IntPtr with the error of 'unsupported type'I'm aware this is a big WTF question and sounds insecure, so any simple helpful alternatives are welcome but there are a lot of constraints on how we can change this system, including complications with the hosting environment. So I would just like to get our piece of data over to the web service to save a lot of other headaches.
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VS 2010 Object Reference Is Not Set To An Instance Of An Object
Mar 14, 2012I've created two Forms of which second one is opened with ButtonClick event with statement: Form2.Show(). Everything worked great until I declared some variables directly under Public Class Form2 (actually they are inputs in TextBoxes of a user which are placed on Form2). Error is: InvalidOperationException was unhandled - Object reference not set to an instance of an object.
View 10 RepliesVS 2010 Object Reference Not Set To An Instance Of An Object?
Jan 4, 2012i got a html to pdf conversion source using the opensource itextsharp library from the[URL]..I copied the code exactly in vb.net 2010 after referencing the library and it gives the 'Object reference not set to an instance of an object' error in the bold line... couldnt find a solution to it..
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VS 2010 Label Font Bold - Error "Object Reference Not Set To An Instance Of An Object"?
Mar 4, 2011Everything I read points me that I'm writing the following code correct, but VS keeps telling me : Object reference not set to an instance of an object.
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VS 2010 "Object Reference" Error When Adding Object To List (Of T) Property
Apr 25, 2011I have a class that has a property that I declare like this:
VB.NET
Private _DirectoryList As List(Of FileDirectoryInfo) ''' <summary> ''' Array of directories. ''' </summary> ''' <value>Object</value> ''' <returns>Directory array list</returns> ''' <remarks>N/A</remarks> Public Property Directory As List(Of FileDirectoryInfo) Get Return _DirectoryList End Get Set(ByVal value As List(Of FileDirectoryInfo)) _DirectoryList = value End Set End Property
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Asp.net - Use The "impersonate" Function With A String (username) Rather Than Intptr?
Jun 9, 2009The System.Security.Principal.WindowsIdentity.Impersonate function takes a System.intptr parameter, which seems awfully useless in my situation (with my limited understanding). I am developing an intranet application that uses integrated security to authorize users page-by-page against a role associated with their Windows Identity. I have no passwords or anything of the sort. Simply a Windows username. For testing purposes, how could I possibly impersonate a Windows user based on their username? The "impersonate" method jumped out at me as obvious, but it takes an unexpected parameter.
View 4 RepliesVS 2010 Auto-login Error "{"Object Reference Not Set To An Instance Of An Object"}"
Jul 31, 2011I trying to make a forum autologin with this code but I get this error "{"Object reference not set to an instance of an object."}" when the program visit a page with a diferent script. is it possible? skip these pages with different scripts and only log into websites such as phpBB. This is de code,
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VS 2010 - Unable To Cast Object Of Type 'System.String' To Type 'System.Object[]'
Jan 25, 2011For I = 0 To 10
If Items.Count = 0 Then Exit For
Dim T As New Thread(AddressOf Thread)
T.Start(New Object() {"Test", "Test"})
[code]....
When I put same code in empty project it works.