How do I get master sound volume and mute status?

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  - 1
    - Problem loading DLL in some machines Well, I tried installing all the missing DLL's, the DependencyWalker program is great!...but still I'm getting this annoying message that says: "System.IO.fileloadException: Could not load file or assembly 'Myassembly.dll, Version=1.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The application has failed to start because the application configuration is incorrect...." I'm ready to give up and go back to the old 2003...=( Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 2
    - Best Practice: Properties in the Constructor For some reason I remember reading that it is not considered best practice to set a Property within the constructor when there is a private variable associated with said property. It would be considered best practice to go ahead and set the private variable. Is this true for example: public class MasterItem : Item { internal MasterItem( int facilityId ) : base ( null ) { this .Facility= ( Facility )facilityId; } protected Facility facility; public Facility Facility { get { return facility; } set { .... facility = value .... } } } The issue is that I have more going on in my set method of the property that I need to be run when the facility is set via the constructor. Obviously, the easiest way to do this is to reference the property in the constructor. Is this not considered best practice Or is my question irrelevant Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 3
    - Object reference not set to an instance of an object for an array The class description for ArrayList states that ArrayList accepts nulls as elements. The only explanation is that your ArrayList has nulls in it, and you're getting a NullReferenceException when you try to convert the null value to byte. Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 4
    - Extension methods Also I am not able to access the function like this: someInts.Sum I changed the name to Sum2 just to be sure as there were other Sums in there. Thanks, Aw Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 5
    - Nested Properties and avoiding Null Reference Exception I have an application that needs to generate some reports. In this application, I use Business Objects. These business objects can have several levels of nested properties. (i.e. Employee.Manager.Manager.Name, or Person.Address.City). I don't want to surround every statement in the report code with a try block to catch a null reference. That seems too cumbersome. If the Address property is null, that's fine, but I want the rest of the report to continue and print. And print something like "--" where the null property was found. So, I wrote some code to use reflection and a string based path to the nested property I want to print. This seems to work, but it also seems to me that there is a better / easier way to do this. Can anyone comment on this for me Thoughts, ideas, etc Code Snippet static string Print( object o, string propertyPath) { string [] properties = propertyPath.Split( '.' ); object nestedObject = o; for ( int i = 0; i < properties.Length; i++) { PropertyInfo nestedProperty = nestedObject.GetType().GetProperty(properties[i]); if (nestedProperty == null ) return "--" ; nestedObject = nestedProperty.GetValue(nestedObject, null ); if (nestedObject == null ) return "--" ; if (i == properties.Length - 1) return nestedObject.ToString(); } return string .Empty; } Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 6
    - Creating a control inheriting from another with vs2005 You can do it the other way around. Take a panel and make webbrowser a member of it. But that's almost the same as a usercontrol. Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 7
    - instance does not exist in the current context I'm create an instance called shtb like this: Code Snippet public form1() { InitializeComponent(); SyntaxHighlightingTextBox shtb = new SyntaxHighlightingTextBox(); ... } Later in the script, i tried to use the instance shtb like this: Code Snippet static string strMyOriginalScript = ""; private void form1_Load(object sender, System.EventArgs e) { strMyOriginalScript = shtb.Text; } When ever i try to build the solution, i keep getting the error: 'Editing Area' does not exist in the current context Where im i going wrong Can anyone help me with atleast this Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 8
    - Trouble w/ resize event I am an experience VB 6 developer who isn't bad w/ C++, but I am having a dickens of a time getting going with C# Right now I am trying to respond to form1's resize event. Within the public partial class Form1 : Form I have placed the following code: private void Form1_Resize( object sender, System. EventArgs e) { Label1.Text = "Resized" ; } This function is not raised when I exit my code. At least the text of my Label1 doesn't change. What am I missing here Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 9
    - Completely disabling mouse input I am trying to find a way to COMPLETELY disable mouse input to the computer, so that if the user moves their mouse the pointer wont move at all, as i have made a program that moves the pointers position to a new place every milisecond, meaning if the user moves the mouse a very jirky thing with the pointer happens, how would i do this Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 10
    - what -32767 means ? make a property that tells you if the shift key is pressed or not Code Block public bool IsShifted { get { if (GetAsyncKeyState(keys.ShiftKey) <0) return true; return false; } } Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 11
    - catch API CALL TO GetSystemDate by another application Global hooks can't be written in a managed language. WH_KEYBOARD_LL and WH_MOUSE_LL are exceptions because their hook functions are run in the process/thread that installed the hook. All other global hooks inject into each and every process and require that the hook function be in a DLL with a specific DLL entry-point--something not supported by the .NET framework. See http://support.microsoft.com/kb/318804 Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 12
    - C# Creating an Object from a String Hi all, I am not sure if this is do able but I would like to do two things. Well one is an extension of the first. I would like to be able to create an object from a string. e.g. String class = "System.drawing.color"; then do Color col = class; I don't really know how to do this. My ultimate goal with this is to have some colours stored in a text file then create a System.drawing.color object with that colour as its value. I don't want to have to do a switch and limit the number of colours that could be used. Thanks for your help Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 13
    - Help Files and Print Button Hi Evan, Cool print process! I'll give it a go now. About the help file. I fount this , there I can choose "Pro .NET 2.0 Windows Forms and Custom Controls in C#", and this . I can DL just the content. I am looking around to sing in, but cant find it... Cheers for printing! Regards, Beezgetz Edit: oh, I did't see it, " Source Code on the right hand side of the page " ! I just DL. Thanx!! Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 14
    - Get list of exported functions from Unmanaged DLL Hi, I have working code of above function in vc++. I need help to convert it to c#....Any one know how to achieve this in c# please help me out here. The code i got is from this link.... Here bool GetDLLFileExports(char *szFileName, unsigned int *nNoOfExports, char **&pszFunctions) { HANDLE hFile; HANDLE hFileMapping; LPVOID lpFileBase; PIMAGE_DOS_HEADER pImg_DOS_Header; PIMAGE_NT_HEADERS pImg_NT_Header; PIMAGE_EXPORT_DIRECTORY pImg_Export_Dir; hFile = CreateFile(szFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); if(hFile == INVALID_HANDLE_VALUE) return false; hFileMapping = CreateFileMapping(hFile, NULL, PAGE_READONLY, 0, 0, NULL); if(hFileMapping == 0) { CloseHandle(hFile); return false; } lpFileBase = MapViewOfFile(hFileMapping, FILE_MAP_READ, 0, 0, 0); if(lpFileBase == 0) { CloseHandle(hFileMapping); CloseHandle(hFile); return false; } pImg_DOS_Header = (PIMAGE_DOS_HEADER)lpFileBase; pImg_NT_Header = (PIMAGE_NT_HEADERS)((LONG)pImg_DOS_Header + (LONG)pImg_DOS_Header->e_lfanew); if(IsBadReadPtr(pImg_NT_Header, sizeof(IMAGE_NT_HEADERS))||pImg_NT_Header->Signature != IMAGE_NT_SIGNATURE) { UnmapViewOfFile(lpFileBase); CloseHandle(hFileMapping); CloseHandle(hFile); return false; } pImg_Export_Dir = (PIMAGE_EXPORT_DIRECTORY)pImg_NT_Header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress; if(!pImg_Export_Dir) { UnmapViewOfFile(lpFileBase); CloseHandle(hFileMapping); CloseHandle(hFile); return false; } pImg_Export_Dir= (PIMAGE_EXPORT_DIRECTORY)ImageRvaToVa(pImg_NT_Header,pImg_DOS_Header, (DWORD)pImg_Export_Dir, 0); DWORD **ppdwNames = (DWORD **)pImg_Export_Dir->AddressOfNames; ppdwNames = (PDWORD*)ImageRvaToVa(pImg_NT_Header, pImg_DOS_Header, (DWORD)ppdwNames, 0); if(!ppdwNames) { UnmapViewOfFile(lpFileBase); CloseHandle(hFileMapping); CloseHandle(hFile); return false; } *nNoOfExports = pImg_Export_Dir->NumberOfNames; pszFunctions = new char*[*nNoOfExports]; for(unsigned i=0; i < *nNoOfExports; i++) { char *szFunc=(PSTR)ImageRvaToVa(pImg_NT_Header, pImg_DOS_Header, (DWORD)*ppdwNames, 0); pszFunctions = new char[strlen(szFunc)+1]; strcpy(pszFunctions ,szFunc); ppdwNames++; } UnmapViewOfFile(lpFileBase); CloseHandle(hFileMapping); CloseHandle(hFile); return true; }; Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 15
    - Multi Threading Issue Hello, I have a winforms app that creates a few threads. What the threads do is scan a memory location looking for a byte of data changes to flag an event. However, whenever more than 1 of these threads are created, the computer lags really bad. I was wondering if anyone knew of a better way to get the same results, while scanning multiple locations (near 10): Here is some sample code: Code Block //myClassObj.ObjectProperty Reads a memory location using ReadProcessMemory private void ScanForChange( MyClass [] scanobj) { while (_scan) { foreach ( MyClass myClassObj in scanobj) { if (!_scan) break ; if (myClassObj.ObjectProperty > 0) { Function1(scanobj); _scan = false ; } } } } Thanks for the help. Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 16
    - interface vs public class What is the difference interface and public class Look like to me if I've public class, interface is just optional. Any scenario I should have interface Thanks. Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
- Next
  - 1
    - DateTime formatting in 2005 Peculiar. I assume you're using ToString then. In that case it will use the thread's CurrentCulture value. You could try dumping this value and make sure it is en-GB. I tried it in a simple app and it displays the value properly. Michael Taylor - 12/21/06 Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 2
    - Text extraction -- This one will make you dizzy Hi, I am not following what you mean by "same input". Did you modify the code from the example given, I can run the code sample without any compiler errors. The error you are getting suggests you put a return statement at some point in the function i.e. int x = 0; return; int y = 0; //=> this is unreachable which means some code will never be run. When I run the code sample it gives the correct result. Mark. Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 3
    - Calling a method within a class from Main() - What am I doing wrong? I'm in the process of learning C# by writing a simple program that converts Celsius to Fahrenheit and vice-versa. My current road block is calling the conversion methods from a class I created which is separate from Main(). For some reason, VC# cannot see the methods with the code I am using to make "the call." I am not certain if the problem lies with the code used to place the call or the way I've written the class itself. Below is the code I have written. First - The Class that contains the conversion methods... using System; namespace Convert { public class Convert { public float UserFahren; public float UserCelsius; public float ConversionFahren; public float ConversionCelsius; float CalcCelsius(float UserValue) { // Formula to convert Fahrenheit to Celsius - ��C = 5/9(��F-32) UserFahren = UserValue; ConversionCelsius = (UserFahren - 32) * 5 / 9; return ConversionCelsius; } public float CalcFahren(float UserValue) { // Formula to convert Celsius to Fahrenheit - ��F = 9/5��C + 32 UserCelsius = UserValue; ConversionFahren = UserCelsius * 9 / 5 + 32; return ConversionFahren; } } } Next - The code I am attempting to use to "call" the methods from Main() using System; using Convert; namespace Program { class Program { public static string UserInput; public static int UserChoice; public static float UserTemp; static void Main() { if (UserChoice == 1) { ... } if (UserChoice == 2) { Console.Write("Please input the Fahrenheit temperature you wish to be converted: "); UserTemp = float.Parse(Console.ReadLine()); Convert.CalcCelsius(UserTemp)); //Code "calling" the conversion methods Console.WriteLine("Your converted Temperature is {0} approximately degrees Celsius \n", UserTemp); Console.ReadLine(); // Used to keep console } } } When I compile the code, the debugger gives me the following error on the Bolded portion of my code. Error 1 The type or namespace name 'CalcCelsius' does not exist in the namespace 'Convert' (are you missing an assembly reference ) Note: I realize that someone (i.e. Microsoft) has probably already written a class for this purpose but I am trying to learn OOP methodologies. My first attempt resulted in a program that did EVERYTHING in Main(). :D Please be gentle. Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 4
    - Object reference not set to an instance of an object. Hi, I am trying to do a simple thing..I made a class PeakOffPeak (this class is actualy a class library and i have added it to my refrences) public class PeakOffPeak { public PeakOffPeak() { } private string name; public string Name { get { return name; } set { name = value ; } } } and now in my main method i am just trying to call it as follow: PeakOffPeak [] peaks = new PeakOffPeak [3]; peaks[1].Name = "unit"; and its giving me this nullRefrenceException error...I dont understand...why am i getting this error...Its such an easy operation... can anyone please help me.. Thank you. Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 5
    - Extension methods Also I am not able to access the function like this: someInts.Sum I changed the name to Sum2 just to be sure as there were other Sums in there. Thanks, Aw Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 6
    - SafeArrayWrapper Hi again, I tried your method today, but couldn't get it to work. I used System.Runtime.InteropServices is this correct Also I use it in this style: public partial class Form1 : Form { public Form1 ( ) { InitializeComponent ( ); } [MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_BSTR)] private void Form1_Load ( object sender, EventArgs e ) { Array arr = MyCOMMethod(...) } ... Do you know what I am missing It gives these errors: Error 1 Attribute 'MarshalAs' is not valid on this declaration type. It is only valid on 'field, param, return' declarations. G:\Dev\WindowsFormsApplication1\WindowsFormsApplication1\Form1.cs 58 4 WindowsFormsApplication1 Error 2 'System.Array' does not contain a definition for 'Sum3' and no extension method 'Sum3' accepting a first argument of type 'System.Array' could be found (are you missing a using directive or an assembly reference ) G:\Dev\WindowsFormsApplication1\WindowsFormsApplication1\Form1.cs 66 14 WindowsFormsApplication1 Error 3 Literal of type double cannot be implicitly converted to type 'float'; use an 'F' suffix to create a literal of this type G:\Dev\WindowsFormsApplication1\WindowsFormsApplication1\Form1.cs 68 34 WindowsFormsApplication1 Error 4 Literal of type double cannot be implicitly converted to type 'float'; use an 'F' suffix to create a literal of this type G:\Dev\WindowsFormsApplication1\WindowsFormsApplication1\Form1.cs 68 39 WindowsFormsApplication1 Error 5 Literal of type double cannot be implicitly converted to type 'float'; use an 'F' suffix to create a literal of this type G:\Dev\WindowsFormsApplication1\WindowsFormsApplication1\Form1.cs 68 44 WindowsFormsApplication1 Error 6 Literal of type double cannot be implicitly converted to type 'float'; use an 'F' suffix to create a literal of this type G:\Dev\WindowsFormsApplication1\WindowsFormsApplication1\Form1.cs 68 49 WindowsFormsApplication1 Error 7 Cannot implicitly convert type 'object' to 'System.Array'. An explicit conversion exists (are you missing a cast ) G:\Dev\WindowsFormsApplication1\WindowsFormsApplication1\Form1.cs 88 19 WindowsFormsApplication1 Thanks alot again, Aw Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 7
    - AsyncWaitHandle.WaitOne dape wrote: HI, There are two issues with your code: 1. the while( ... ) loop will never terminate (as pointed out) 2. EndInvoke( ... ) will block until the callback is completed EndInvoke won't block if AsyncWaitHandle is signalled--the code as posted won't make it to the EndInvoke call until the AsyncWaitHandle is signalled. Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 8
    - ArrayList.IndexOf What overloads for equals, ==, != do you have it may be something to do with List<Vector3> looking to call .Equals( object ) still rather than .Equals( Vector3 ) Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 9
    - C# 'try catch' syntax question Actually, I believe the question was over-analyzed and the answer is yes . Just define one catch block that catches all errors of the base type Exception. The following code snippet will catch any exception that occurs in the try block. Code Block try { // // do some stuff here // } catch (Exception ex) { MessageBox.Show("Unable to find files!"); } If you need to find out if it was a particular Exception type and gather its associated information, you could try casting it (using is ) as certain Exception types and use it's related properties. Code Block try { // // do some stuff here // } catch ( Exception e) { if (e is FileNotFoundException ) Console .WriteLine( "FileNotFound error: {0}" , (( FileNotFoundException )e).FileName); else Console .WriteLine( "Exception error: {0}" , e.Message); } Good luck! Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 10
    - message queues questions I have a couple of questions about message queues, threads, .net, etc. 1. Is there an event that I can connect to when the main form is loaded, after application.run is called (or at least after the form is shown) If so, I can create a synchronous TCP connection which blocks while listening for a specific port. 2. If I am blocked (as mentioned above), is the message queue still running In other words, can I click on other controls on the form, maximize, restore, minimize, etc. and have events fire Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 11
    - An unhandled exception of type 'System.FormatException' Are you calling Parse in any of this logic Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 12
    - How do I get the current time in this way? Hi. I want to get the current date and time in this timestamp format: For example: Oct 26, 2007 12:35 AM I want it to look like this: 1193343950712 Can anyone please help me do this in C# Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 13
    - help with MemberShip object hi all., i have 2 diffrent web services for 2 diffrent application, both hosted on the same iis. in both i use the Membership object. what will happen if app1 will createuser for UserA , and appb will createUser for UserB Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 14
    - Using Timer + making calls on obj in another thread...how to do properly? class MyTimer : Timer { public MyObject Obj ; } in my class do this... MyTimer myTimer = new MyTimer(); myTimer .Obj= this ; myTimer .Elapsed += new ElapsedEventHandler (MyHandler); myTimer .Interval = 5 * 1000; // 5 seconds myTimer .Start(); public static void MyHandler( object source, ElapsedEventArgs e) { try { MyObject Obj = ((MyTimer)source).Obj; lock (Obj) // correct { Obj.Foo(); } } catch ( Exception err) { throw ; } } The handler gets called on another thread (of course).... Now is this the correct way to access an object and call a method on it, from the timer function Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 15
    - Typing in Visual Studio 2005 Text Editor is extremely slow I've been trying to find a way to write a macro to toggle the Navigation Bar - so I can turn it on for the times I need it. Of course, I'd like to leave it on all the time, but it's just too sloooooooow. Anyone come across any macros for toggling it Tag: Visual C# General How do I get master sound volume and mute status? Visual C#
  - 16
    - Process.waitforexit() not exiting I would like to try that, but it is too much of a hack. I have too many different commands that take different amounts of time (30 seconds to 25 minutes) so there is no real time setting that I could place without destroying my performance. This function has been working correctly for multiple commands over the last 6 months and now it decides to *** out on me. I tried it on a different computer without any problems (which is really messing with me). I know that it is NOT the output/error redirection because a new WINDOW is being created on the server that I am remoting to. As soon as I close that window, my process exits as expected and the correct output is displayed on the User side. Thank you for your help, but I am getting really frustrated with this problem. Tag: Visual C# General How do I get master sound volume and mute status? Visual C#

smork

Hello,

I can't seem to figure out how to get Windows Vista master volume level and mute status. Searches have not brought up all that much help. It seems the way volume changed from XP to Vista makes all of the solutions I've found not work. (a P/Invoke sample I found on the site seems to be reporting/adjusting its own volume level and not master.)

I'm not looking to change these values, I just want to know what they are at a given time in my application.

Re: Visual C# General How do I get master sound volume and mute status?

JohnWein

I'm pretty sure that you will have to use Winmm.dll to get the master volume. The Vista audio API doesn't provide access to the primary buffer. Mixapp.exe will give you the Control ID's for the volume and mute.

Re: Visual C# General How do I get master sound volume and mute status?

smork

This is my first windows forms usage of C# and well I have been stuck on this now for days. There doesn't seem to be much info available. Mixapp.exe just does the same thing everything else does, report what it thinks is master, but in Vista it is just application volume.

I think I need to get the values from an endpoint device:
http://msdn2.microsoft.com/en-us/library/ms678705.aspx

But I don't know how to get that.

Re: Visual C# General How do I get master sound volume and mute status?

Ji Cheng Wang - MSFT

Hi smork,

If you would like to get Vista master volume and mute status, I suggest you to check out this thread about "Vista Master Volume Control with C#" for reference - http://forums.microsoft.com/MSDN/ShowPost.aspx PostID=1287868&SiteID=1

Hope this helps,

Regards,

Re: Visual C# General How do I get master sound volume and mute status?

smork

Thanks, that is exactly what I needed.