Im working on the Hyvar.NET project, and I've just started sandboxing browser tabs. Im using the sendmessage function of win32 to manipulate each tab, but i need to send things like Webbrowser.Navigate(URL) in the sendmessage function.
So far i have this:
<DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _
Public Shared Function SetParent(ByVal hWndChild As IntPtr, ByVal hWndNewParent As IntPtr) As IntPtr
End Function
[CODE]................
I somehow need to send the navigation methods etc using sendmessage....
What's the difference between these two declarations for PInvoking a user32.dll function?The first way, which I've commented out since it gets an error (Type DllImport is not defined"), the second way works. [code]
I'm attempting to send characters to an inactive window for another application by using the Windows API function SendMessageA from a simple VB application, but it isn't working. When I run the code below, everything seems to be working as intended right up to the point where the API call is made. But the other app (Notepad, for testing purposes) doesn't appear to receive the characters.I receive a strange result value back from the API call that might suggest some kind of error, but I have no idea what it means.
One of the inputs to my little app is a handle value for the window that I am sending to, and I have verfied using two different apps that the handle value I am supplying is correct. I suspect that the problem may be that VB isn't treating my handle value (a long) as a "true" handle for use in the API call, but I don't know for sure if that is the problem or how to correct it if so.
P.S. - I edited this post to improve the formatting. During the interim I had made some changes to my code in an attempt to improve the results, but so far still no joy.
Imports System.Runtime.InteropServices Imports System Module SendCharsByHandle[code].....
In Visual Studio 2008 I am using :Private Declare Function BlockInput Lib "user32" (ByVal fBlock As Long) As Long To stop input from occuring during a search-replace operation.
BlockInput(True) ' do not allow input during search and destroy Dim cursorIcon As Cursor cursorIcon = Cursor Cursor.Current = Cursors.WaitCursor
Then setting it to false at the end of the operation. It did not work, so I thought maybe it was because I was calling it from a child window, so I created a function in the mainwindow, and ran it like this:
FrmMain.BlockFrmMainInput()With these functions is the Main window:
[Code]...
It did not solve the problem. I thought maybe it was because I was running under the debugger, so I tried compiling and running it debugger-free, but that did not do any better. I am still getting input when I double-click the mouse on either form.
I am working in VB.Net.Can some one provide me the documentation of Lib "User32". I want to know that Lib User32 is used for what purposes Or which functions it can perform?
I have a web cam connected through USB,I capturing and saving video it with avicap32.dll and user32.dll.But in the same time I need to starting other hardware and working with it trough COM port during capturing. And here appearing a problem, because then I send a command for start video capturing:
SendMessage(hWnd, WM_CAP_SEQUENCE, 0, 0) ' start video capture
the executing code stops at this line until I click to stop to capture. But in the capturing time I need to work with my hardware, to obtain the data from it, and after that to stop capturing.To make to work simultaneous video capturing and my hardware or its impossible to do that with avicap32.dll and user32.dll.
I am trying to write a system service that can detect whether the user is active and then launch a process if not. I am using a service because I want this to work if the user is logged in or not. I have been trying to hook into the user32.dll API and retrieve the time since last user input. However the integer being returned is always 0 so I don't think it is working correctly. Is this not possible when running as a system service?
I was wondering if there was a function in user32 that could enable a hwnd control if it is disabled (grayed out) If I know the handle then can I do this? Also, if it is a menuitem, can it be done too?
Code: EntryPointNotFoundException was unhandled by user code
Code: Private Declare Function SetForegroundwindow Lib "User32" (ByVal hwnd As IntPtr) As IntPtr Private Declare Function GetForegroundwindow Lib "User32.dll" () As IntPtr Private Declare Function SetActiveWindow Lib "user32" Alias "SetActiveWindow" (ByVal hwnd As Long) As Long
I need a simple win api inside c# / vb.net, to read a text out of a message box. I have a function to read a message box title, but i have no idea how to get the content text.The messagebox title function is:
' Function to retrieve the popup window associated with the form, as well as to ' find the child windows of the popup... Private Declare Auto Function GetWindow Lib "user32.dll" ( _
I have a small application I have developed to just put in some text into another applications input box, and it works perfectly!..... On windows 7. When I try to run the application the exact same way on windows xp the entire computer freezes for a little bit of time, then after it continues to run my application it doesn't insert any text to the applications textbox. I am not sure entierly what could cause this. Both are 32-bit and are running the same version of visual studio. Here is the code that I use. modApi.vb
I want to make an numerical integration method with takes in an analytic function and integrate it over a specific interval. For the numerical integration procedure I want to use some procedures in nr.com. The problem is that these are programmed in C++ and they uses functors to pass a function to the integration method. How can I do this in VB 2010?
I want to initialize the function (i.e. set a=1,b=0 for function y(x)=a*x+b) and then pass the function to the integration method. Then when the integration method call the function it only calls the function with one parameter (i.e. x since a,b is already set)
What is the best way to do this in VB2010?I want to make a general integration method where I can pass any single valued function and integration limits.
I have just started using VB, and from what I have found so far it seems like the tools you have is
- to us a delegate for the function - to use a lambda expression for the function - send a pointer/adressOf - to create a function class/structure and submit this to the function
As for now I am most inclined to create a function-class. But I am not really sure how.F.ex. I make different classes for each "uniqe function" I want to integrate, but how can I pass them to the integration function when I need to specify the argument type in the integration-function-call?This seems like a basic problem which applies to many Math operations, so I think it would be very useful to clarify this.
I'm trying to undersatnd the syntax of calling a funciton and it seem confusing when I'm using a web service in ASP.net. Maybe this question should be in an ASP forum, but it is a VB question. This simple web service allows you to type in your name and it response with an alert box with you name.
My question is, How can you call a function with 2 arguments when the function is only defined for one. I understand that the second argument is actually a method that handling the respons, but how can you interchange function arguments for methods and how do you know that there are methods for
I am trying to convert a DLL function call which has the Callback function routine called within the DLL function call.The DLL function call signature is like this:
i wanted to ask how to make picturebox1 ,to which functions are already assigned, perform the same function as picturebox2 ,to which no functions are assigned.For example:I have already made picturebox1 and have assigned it alot of function like when play button is pressed then picturebox1.visible = true and when we press pause button picturebox1.visible = false. So now i decided to make a theme and have to remove the picturebox1 and want to allow the picturebox2 to havefunction of picturebox1.But when i disable the theme the function of picturebox1 should go back to picturebox1.
I need to execute a stored function in oracle or sql through vb.net. I created a command object. Depending on the database type(oracle or SQL) i am preparing the Command text as Select functionName(?,?,?,?,?,?,?,?) from dual; (For Oracle) Adding the parameter values of the function. Now performing the ExecuteScalar which is not working saying invalid parameter. This works with ODBC connection string. But ODBC doesn't with 64bit. My Requirement: Code should execute a user defined stored procedure by taking the values at runtime.
I'm currently working with a client's VB.Net code, which was developed for them by a small development shop a few years ago and which they purchased and have been maintaining and uprgrading since. This client's primary developer is out on indefinite (likely permanent) medical leave and I'm now filling in until they bring in a full timer (as I'm a contractor here). My current task is to add some functionality to a the VB.Net code they purchased. I'm finding practices and techniques in the code that absolutely baffle me and can't make the code do what I want. I'm starting to wonder if it's me and was hoping to get some thoughts on the code I've encountered.
For example: Setting a variable to accept the result of a function by calling the function with many parameters, clearing the parameters in the function, setting them to some value, calling another function with those new values, then never using the values returned by the functions. I'll add a code snippet in the first comment since this is already getting long.
I was looking over some code that another developer wrote and found this:
Private Declare Function ShowWindow Lib "user32" (ByVal handle As IntPtr, ByVal nCmdShow As Integer) As Integer Private Declare Function SetForegroundWindow Lib "user32" (ByVal handle As IntPtr) As Integer
How can I call a function from inside another function and suspend the calling function until the called function is finished? I hope I can get some replies because I don't know how to ask the question and make sense:).
Anyway what I am trying to do in steps:
1. The user clicks button1 which triggers the click event. 2. From the click event I call a function 3. I then pop-up a form, that has instructions for the user to read. 4. After the user has read the form he will click the "Done" button and return to the calling function.
The problem is the the calling function continues to execute. I want to stop execution of the calling function until the users clicks the "Done" button on the instruction pop=up. I know I can use a msgbox but the instructions can be lengthly and does not look good in a msgbox.
I have tried the Call method with return in the "Done" button click but I can make that work. I also tried a goto statement but I can get that to work either. In the call statement I said call frmInstruction.show() and it got there but as I said the calling function continued to execute.
ive two custom controls, which are used to draw and edit etc...(like paint but customized....) i want to save their images with a single click....So im using the Getimageofcontrol function to do it....its code is below:::
Public Function GetImageOfControl(ByVal c As Control) As Image Dim rc As New Rectangle(c.PointToScreen(c.Location), c.Size) Dim i As Image = New Bitmap(rc.Width, rc.Height)[code].....
and the code to call this function for saving the images is simply.. ...
I have a function where I am performing a lot number of database operations inside a Sub. The operation when called directly like:ExecProcess()
takes about 11 seconds to run.However, if I create a Delegate, and call the sub using BeginInvoke(), the very same process takes over 40 seconds to execute.Here's the threaded code:
Protected del As ProcessDelegate Protected Delegate Sub ProcessDelegate() del = New ProcessDelegate(AddressOf SELocal.ExecJob) Dim cb As New AsyncCallback(AddressOf Me.ExecJobComplete) del.BeginInvoke(cb, del)
Anyone know what may cause a function to take longer inside a new thread, rather than calling directly?
To have a function that takes the average (which is calculated by a different function) say for example the average is 6, now the function is to take the number 6 and get the variance from six to another number lets say its 12 so this will return a calculation of 50% variance. now here comes the issue, i have it calculating the variance how ever lets say that there is a score that is 0, how can i make it calculate the variance without taking count for that 0? i guess you can say i need it to "skip" if its a 0.
Some programs implement command parameters, Like my favourite computer game - Crysis - has them and windows media player has them.But how could i implement them in VB.NET..I want to have a component of my program built as a seperate exe - so it can be an Optional component.But of course the seperate exe, on load, needs data passing to it.So i need something like Process.start("Componentname.exe", "/StartDL <Suchandsuchastring>)/StartDL will need to call a function, and the string that it uses will be given to the function to initiate a download?
