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I maintain a very mature product (over ten years old) that was written in VC++ 6 (MFC). My team is in the process of giving the app a new look and feel. We decided to try to convert the project to .net to leverage the GUI elements; but had too many issues during this process and forfeit the idea.
This leads to my questions:
1.Could an application that is compiled under VC++ 6 use Win Forms, or VC++ 2003(or higher)Dialogs?
2.This is more of a secondary question to number 1). Could controls be written in C# or VC++ 2003(or higher)then the assembly or .dll be used by an application compiled in VC++ (MFC) 6?
3.If you answer yes to either question; is there any documentation?
Thank you ,
-e
P.S. My goals is to slowly move the application to the new platform. I am trying to make the application co-exist between VC ++ 6 (old code) and VC++ (maybe .net) 2003 or greater (new code). Since I don't have the option to compile the application greater than VC++ 6.
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Hi,
I've loaded gif image into Image object. Could you please give me an advice how to change frame delas? As someone is interested, I get them as follows:
Dim PropertyTagFrameDelay As Integer = &H5100
Dim propItem As System.Drawing.Imaging.PropertyItem = img.GetPropertyItem(PropertyTagFrameDelay)
Dim bytes() As Byte = propItem.Value
Dim delays(frame_cnt) As Integer
Dim i As Integer
For i = 0 To frame_cnt - 1
delays(i) = BitConverter.ToInt32(bytes, i * 4)
Next
Thanks,
Alex
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Wouldn't this work also inverse?
You could use BitConverter.GetBytes to fill a byte array with the delays, stuff them into propItem and then call img.SetPropertyItem.
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Hi,
Thanks for answer. The point is that this don't work inverse, when I've tried to call SetPropertyItem for this property item with this id, it crashes...
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Well then sorry. This was just the first idea that came to my mind.
What exactly means 'crashes'? Have you tried catching the exception and looking into the error message?
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It throws System.ArgumentException with the message "Property not supported." How is written in MSDN it throws this exception if the image format does not support property items. Honestly I think it's a little bit stupid when I can get this property item, and can not set it...;)
And the another question I have is don't you know why ImageAnimator displays gis much faster than it is shown by all other programs, and don't yo know what to do with all this? 
Thanks,
Alex
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You are right - this sounds weired. Sorry I don't think I can help you on this 
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Hi,
Robert, thank you very much for your trying to help!! I've asked this question in several forums and you were the first who tried to help!
TonightI've found the solution, so let me share it with you
I've wrote my own animator, which uses timer and updates frames for gif images according to frame delays. It was very interesting to find out (I've got this information from one paper) that ImageAnimator for animation uses timer also with interval equal to 50 ms. I've played with my own control and have found that if I put 100ms for timer interval, it plays exactly the same way as browsers do!! This inspiration has came to me at about 3AM tonight It seems that team which has developed browser has used 100ms for their animation and team which has developed .NET framework and ImageAnimator in particular has used 50ms for it... 
That's it, now you also know what was the problem and how to manage it.
Best Regards,
Alex
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Thanks for the infos. One never knows when it might be useful.
This still seems weird. I think someone doesn't apply to "the standard" and I think it's the .Net framework.
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i want to know will the insatll shield 10.5 supports dotnet frame work 2.0?
Rajanikanth A.B
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hey can anyone brief meabout the differences between COM and .Net.
also the advantages/disadvantages of the two over each other
Thanks
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COM is Proprietrary standard and sticks to Windows OS only.Where as .net is Paltform independent
COM doesn't support inheritance
COM has disadvantages of DLL hell
.Net support XML completley
"Aim to go where U have never been B4 and Strive to achieve it"
http://groups.yahoo.com/subscribe/dotnetforfreshers
http://himabinduvejella.blogspot.com
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This question unfortunately requires a long time to answer. However, a few other tidbits.
COM is all about interface inheritence, and it uses an artificial construct, IDL and the registry, to maintain all of those interfaces. In .NET, an interface is a native type, and implementation inheritence is also supported.
COM is highly C++-centric, whereas .NET moves closer to the goal of being truly language-neutral.
COM also relies on Win32 and the registry to make it work. .NET is more self-contained.
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Can anybody tell me how to implement a normal (2-state) checkbox for a column on my DataGrid? I have tried using every kind of .NET admonition ("AllowNull = false" on the style, on the column, etc.), but I always get a 3-state check box that at best is a hassle (extra clicking required to get where you want) and at worst causes an error if they leave it in the null state. I don't relish the prospect of watching my users' eyes glaze over as I explain to them the difference between "false" and "DBNull".
Any help will be greatly appreciated!
Doug
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Hmmm... setting AllowNull on the DataGridBoolColumn to false should work (I remember I used it once and it worked).
To avoid the nullstate you could also set the NullValue property to either true or false.
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You can set the AllowNull property on the DataGridBoolColumn to false and it will prevent the tri-state checkbox. I used a little reflection to get a reference to the internal DataGridTableStyle used by the grid (if there's a way to access that field via the public interface, please let me know how).
private void Form1_Load(object sender, System.EventArgs e)
{
DataTable tbl = new DataTable();
tbl.Columns.Add( "TwoState", typeof(bool) );
tbl.Rows.Add( new object[] { true } );
tbl.Rows.Add( new object[] { false } );
this.dataGrid1.DataSource = tbl;
DataGridTableStyle tableStyle = typeof(DataGrid).GetField(
"myGridTable",
System.Reflection.BindingFlags.Instance |
System.Reflection.BindingFlags.NonPublic).GetValue( this.dataGrid1 )
as DataGridTableStyle;
(tableStyle.GridColumnStyles[ "TwoState" ] as DataGridBoolColumn).AllowNull = false;
}
Josh
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Thanks for all the answers, but setting the AllowNull is definitely not working wither for Column or Style. I am becoming convinced that this is because I am working with .NET Framework 1.1. 
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Hi All... Currently i am doing my banking application using ASP.Net,C#, SQL Server2000... i want some technical solution realated securities from you guys as follow..
i already logged to my application by using username and password.. after login page my home page Home.aspx coming on screen.. i have features all like Balance Inquiry, Mini Statement, Last Transaction, Private Banking, Net Banking in my Home Page in left menu side. All Features are working very well.. For Security Reason i want some technical help from all of you guys...
Problem is After my successful login page If i not touch the Home page or if i not click on any features available in home page for 10 minutes.. Like if i click on Balance Inquiry Link after 10 minutes that time Page Login.aspx want to open instead of BalanceInquiry.aspx... After my successful login by username and password i want to open page BalanceInquiry.aspx (do not want open Home.aspx Page Again)... For that what i have to do in my Application to make more secure... if u have any articles link then please send me..
Please Please Help me if you people have some technical solution... Bcz right now i am on mid way of that project... if u have any articles or articles link please help me out....
Regards,
Patel...
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You'd be better served asking this in the ASP.NET forum.
But, off the top of my head, your session timed out. This means that anything you saved in a Session variable died with the time-out. So, if you're tracking the current page the user is on, that tracking information died too. I don't see how you're going to do this without actually compromising your security a bit by saving the last visited page in a cookie on the client side. And even then, that cookie will have to have a expiration because if you don't, the user could log in 3 days later and end up on the last page they visited instead of the home page.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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Hi all,
I have written a small application that users can download from our website. How can I build a setup program so that it will detect if the framework needs to be installed and then install it without the user knowing?
Thanks for any help.
Linda
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Search MSDN on "Bootstrapping" and "dotnetfx" or "Net Framework" yto find the various options for installing the framework as a prerequisite.
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i know the procceses number,ip and system name of any system on LAN. How can I open that process on my system which is also connected on LAN keeping in view the security checks.
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Define "open that process". What do you want to do with it? Security restrictions will prevent you from doing a lot of things...
Dave Kreskowiak
Microsoft MVP - Visual Basic
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i want to open processes like web page, word document which is already opened on the other system. i know process id, system number etc..
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You still haven't answered my question. What do you want to do with the process?!
Dave Kreskowiak
Microsoft MVP - Visual Basic
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