Convert 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'.
How can I convert IntPtr to Int64?
vb
Convert.ToInt64(GetForegroundWindow())
error :Unable to cast object of type 'System.IntPtr' to type 'System.IConvertible'.
how I can convert an Integer of an object handle to an IntPtr?
View 2 RepliesI'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]....
I 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 RepliesIn working with large prime numbers, I appear to have stumbled on a problem. Powers of 2 are showing up okay, but when I try to add or subtract from them, I get erroneous results. Below are the powers of 2, minus 1, for exponents 51 through 56. Notice that, starting with exponent 54, The resulting number is even, which is obviously incorrect. I used data types INT64 and UINT64 and got the same results for each.Here is my code and a partial list of the results:
Dim i, iTest
As UInt64
rtbIsPrime.Text = ""
[code]....
Be it in 32 or 64 bit system?
View 3 RepliesIm reading data from a VB random file.
Using dim value as int64, the output is: 4674762526611734528 Using dim value2 as date, then converting to dateticks, the value is 627740064000000000 The actual date is: 26/03/1990
Why is the int64 value not the same as the dateticks value?? How do I convert the int64 value to dateticks value?
what does the convert command do in vb.net? and could you tell me what difference is between int32 and int64?
for example
dim h as integer
h=convert.toint32(textbox1.text)
Will that detect whether the integer should be int64 or int32? What about if we run the program twice. Once we use small numbers and latter we'll use big numbers?
Let's look at this for example: vb.net Dim vector1 As List(Of Int64)Dim vector2 As List(Of Int64) vector1.Sort()vector2.Sort(Function(x As Int64, y As Int64) As Int64Return y - x
What about if I do: vb.net vector1.Sort()vector2.Sort(Function(x As Int64, y As Int64) As Int64Return y - x
[URL]
What 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 RepliesI see everywhere people use IntPtr, is there any reason I should use UIntPtr, instead?
View 2 RepliesI 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 Repliesi 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)
{
[Code]...
This 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?
View 3 RepliesThe 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 RepliesI 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
[code]....
I need to get the address of an integer and assign it to an IntPtr to use in an API.[code]...
View 3 Replieshow 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 RepliesAlways 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].....
i 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 RepliesWe'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.
[Code]...
[Code]...
How do I convert this proper? (Option Strict On)
The 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 RepliesSee where my vb.net equivalent of a working c# assignment statement is not working?
bytes(i / 2) = Convert.ToByte(hex.Substring(i, 1), 16)
Here's the c# followed by the vb.net function.
private byte[] StringToByteArray(String hex)
{
int NumberChars = hex.Length;
byte[] bytes = new byte[NumberChars / 2];
[CODE]...
And the vb.net that is throwing the error within the for loop
Private Function StringToByteArray(ByVal hex As String) As Byte()
Dim NumberChars As Int16 = CShort(hex.Length)
[CODE]...
my project was intially mandated to be done in c#.however a large contributor to the project wrote much of the business logic, which he knows well, in vb.net.How difficult would it be to convert the following c# code into vb.net.
[Code]...
i wanna try to convert this ASM code into vb.net or at least find a solution that will allow me to enable this script after creating a handle on a kernel32 process.
View 1 RepliesI am looking for some library or code that will allow me to convert mp4 video to mp3I want it to be for free and compatible with the latest .NET framework (4).Also, if possible, I am looking for a free ffmpeg wrapper than I can have in my vb.net application without trial or messageboxes.
View 2 RepliesWill Microsoft Visual Studio 2008 convert my app to an app I can use on the Internet. I've used it to help convert up from 2005 but I'm looking so save time in creating a web app version.
View 3 RepliesI developed a windows application in VS2008 as 2.0 . I would like to migrate to 3.5 . This really basic but how do I do that? It seems like I should just change a few parms somewhere, but I can't find it.
View 2 RepliesI have my running application in vb 6.0, & needs to convert in C# .Net platform
View 9 Replies