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Yes, it's possible, but then you're not really writing a CD-ROM player, are you?  Besides, if you're new, you should really start out with something a little more basic.
To include the Windows Media Player into your Windows Forms application, customize your toolbox in VS.NET. Click the COM tab and find the Windows Media Player control and add it to your toolbox. Then simply drag and drop that onto a container control (like a Form or UserControl) and two interop assemblies (a.k.a. Runtime Callable Wrappers) are created - one for the ActiveX control, and one for the WMP typelib. Then add your Eject button, for example, and call the method on your player control, which is declared as a variable.
To note, if you're going to strongly name your assembly (and it's always a good idea to, especially if you need to install it into the Global Assembly Cache (GAC) or do anything decent with versioning assemblies) you should right-click on your project and select Properties. Find the assembly key filename and pass the filename (path relative to the project, or an absolute path) of a key pair you generated with sn.exe -k KeyFile.snk (any filename will do). When the interop assemblies are created, they are created with strong names as well. A strong name assembly can only reference other strong named assemblies, though non-strongly named assemblies can reference strongly named assemblies.
Microsoft MVP, Visual C#
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I have see the EnsureVisible Method of both TreeView, and TreeViewItem. I want to just check if the item is visible or not, I don't neccessarily want to force it to be visible. I've also see TopItem, but I'd reather be able to check the visibility of any item in the control. I imagine I could use GetItemBounds to get the height of each Item then do some math to see if the control's height is large enough to show the specific Item in question, but I didn't know if there was a built in Property or function that would be better to use ?
Thanks for any thoughts you may have.
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You didn't see TreeNode.IsVisible when looking at all those properties? 
Microsoft MVP, Visual C#
My Articles
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Wow,big Typo there I meant to say ListView not TreeView...sorry about that.
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Then either use ListView.GetItemRect or ListViewItem.Bounds (or ListViewItem.GetBounds, but used in the same way) and determine if the returned Rectangle.Y is greater than the ListView.Bottom.
Microsoft MVP, Visual C#
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OK, I kinda figured those would be my options, thanks Heath....
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I need to upload from exel doc every day 20 rows of 5 input fields into my company's web site to an aspx page into asp:textbox components and send to server via send butoon in a loop(20 times). anyone please point me to code for doing that anyway in c#.
10x
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Simple: write an application that uses a timer, read-ins the Excel spreadsheet using an interop library (add a reference to Microsoft Excel to your project), and POST the data (see the HttpWebRequest and HttpWebResponse classes) to your ASP.NET application.
If you want help with something specific, then ask about something specific. This forum is intended to help you with programming question, not really to help you design an application.
Microsoft MVP, Visual C#
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Hi!
I have a try-catch-finally block, the catch declares some Exception e, but I don't need this e... Now if I compile this I get an unreferenced variable warning...
How to avoid this, unreferenced variable warnings?
Best regards and thanks in advance,
Dominik
_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do?? 
(doesn't work on NT)
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try
{
... some code that might fail...
}
catch
{
... code for handling ALL exceptions ...
}
Note: There is nothing after the catch statement! No unreferenced variables...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Dave Kreskowiak wrote:
try{ ... some code that might fail...}catch{ ... code for handling ALL exceptions ...}
AFAIK an empty catch catches nothing! But to answer the original q.
try { } catch (Exception) { }
top secret xacc-ide 0.0.1
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True, but that's pretty pointless in reference to what Dave wrote. This type of declaration works best when you want to catch specific exceptions (besides the base Exception class), whether or not you declare an exception variable (I know you know that, leppie, I'm just explaining it to the poster if he manages to read it).
Microsoft MVP, Visual C#
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Actually, it will catch the Exception. Try it...
try
{
System.IO.Directory.SetCurrentDirectory(@"Z:\testme");
}
catch
{
MessageBox.Show(@"Exception caught!");
}
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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 I think I know why I thought that.
Was running a console app, and waiting for some output in the VS.NET Output console.   
~leppie()
top secret xacc-ide 0.0.1
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Hi All,
Just a simple question. I am trying to add the data in a access database (file residing on local machine.) I saw the format and worked according to it. Here is the code.
Console.WriteLine(CBoxCatagory.SelectedItem.ToString());
String sSql = "INSERT INTO MainCatagory" + "(MainCatagory)" + "VALUES("+CBoxCatagory.SelectedText+")" ;
conn.ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;" +@"Data source= C:\" + @"My Documents\db1.mdb";
conn.Open();
OleDbCommand objCommandMain = new OleDbCommand(sSql,conn);
objCommandMain.ExecuteNonQuery();
When I use the fixed or hard data in Values then statement executes fine. But when I am trying to execute with a variable of type ComboBox then it is giving me error. I also tried to use a simple string variable and see the result and it was same. Seems like there is problem in the syntax for adding values using variables.
Here is the error.
An unhandled exception of type 'System.Data.OleDb.OleDbException' occurred in system.data.dll
Can you suggest me something on this one.
Thanks,
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OK, the first thing I notice is that you're doing a lot of unnecessary string concatenation. The second thing I see is that your CBoxCatagory.SelectedText value is not surrounded in quotes, for the sake of SQL. Try this:
tring sSql = "INSERT INTO MainCatagory (MainCatagory) VALUES('" + CBoxCatagory.SelectedText + "')";<br />
conn.ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data source=C:\My Documents\db1.mdb";<br />
...
Regards,
Alvaro
Give a man a fish, he owes you one fish. Teach a man to fish, you give up your monopoly on fisheries.
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I tried that but it did not work. Then I replaced CBoxCatagory.SelectedText with fix text as Onemore.
It worked fine.
One more thing i observed with my database is that Table Maincatagory has 2 colums. One is maincatagory and other AutoIncrement. When I try to execute the statement with CBox it fails but it increses the AutoIncrement count.
Now does this mean that script is failing in database at insert point bcoz data coming in has wrong format. But I think the format is text so it should not fail anyways.
Any suggestions.
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The SelectedText property of a ComboBox is the selected text in the editable portion of the box. In some cases, SelectedText can return null, especially if your ComboBox is setup with its DropDownStyle set to ComboBoxStyle.DropDownList. Use SelectedItem.ToString() instead.
This could have been easier to diagnose had you been using parameterized queries instead of string concantenations...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I tried that too!
In Fact, I also tried something like this.
String firstString = "ABCCD";
and then used this firstString Var in place of ComboBox var.
Thanks,
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Like I said... Parameterized queries would have fixed this problem from day 1. Using the parameterized version, you don't have to worry about how the strings are escaped in the SQL statement and if there are any special characters in the string that you pass that will screw up the statement syntax. All of that is handled for you, automatically!
There is no reason to NOT use them!
Everything we told you will work under normal circumstances. There is something else you're not telling us, that may seem like a small detail that doesn't mean anything, but makes one hell of a difference to SQL.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Though I am kind of new to C# and I exactly dont know the syntax to use parameterized queries, I will try to learn that. Meanwhile, After your stress on nothing wrong in suggestions, I tried to use the same statement in Form Load method and to my surprise it worked. Then I copied same exact statement into Button_Click function (where I was trying previosuly ) and it worked too.
I dont get C# for this. I was always using rebuild for project before attempting any try.
Can you explain this.
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Look at the documentation for the OleDbCommand.Parameters property. It explains it quite well and gives you examples. Using parameterized queries is highly recommended in ADO.NET because it checks for common security holes and eliminates the need to escape single and double quotes. It's also the only way to import binary data, like when using SqlDbType.Image.
Microsoft MVP, Visual C#
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Stupid Question:
Scenario:
Need to passé Reference data to my IO engine. It opens-Sends-Closes or it Opens-Listens and sends data to User in call back when data is received, then closes. A pointer that can't be global would be perfect, but C# so ref to data would have to suffice. The ref has all the data to run the engine it self. The IOClass has the engine witch intern uses and API wrapper class for win32 IO functions.
Conundrum:
How do I get the managed ref to go through the win32 IO call back so the IO state engine will work?
Note – the Data object must be pointer for win32 and must be able to be read after the IO is complete by the managed C# code. There have been many articles on the IO functions in question, but now one has solved this as far as I have seen.
Class Guy Winslow
{
public:
WINcontrols
H: 925-606-1091
M: 925-922-0222
gdwinslow@wincontrols.com
};
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It's a little difficult to follow your post, but I'll try...
You're saying the callback function exist in win32 then P/Invoke the callback, create a delegate of the property type in managed code, and create the delegate that points to the P/Invoke call. If you already have a delegate and the P/Invoke'd method and the delegate signatures don't quite match up (may you need to do some custom marshaling, although this case is best solved with an ICustomMarshaler implementation), then define a method which has the right signature and calls the P/Invoke'd win32 callback function.
Microsoft MVP, Visual C#
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I think i understand what you are talking about. And I thing I am doing this. Sari for mi ignorance new to .NET. This structure my explain better:
[StructLayout(LayoutKind.Sequential)]
public unsafe struct OVERLAPPED
{
public int Internal;
public int InternalHigh;
public int offset;
public int OffsetHigh;
public int hEvent;
public Socket *socket;
}
It’s defined in my API Interface class. This needs to be LocalAlloc, and passed to the ReadFileEx function. This works fine without the Socket pointer, witch is or should be a “ref Socket” to a managed class in C#. I can’t seam to passé it into the OVERLAPPED Structure so the File IO callback can use it to get rest of data and set error info. This socket class instance is created by responses to messages it receives, vary much like Window Sockets. Except it’s our device and not network device. Note - callback must be static. So am I not understanding how you are suggesting to use the P/Invoke or is there something else you guys can suggest.
Class Guy Winslow
{
public:
WINcontrols
H: 925-606-1091
M: 925-922-0222
gdwinslow@wincontrols.com
};
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