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We often see in some softwares that when we run them, the main screen becomes dark, and a pop up message comes in front of us demanding for user name and password. At that time if we click the screen(form) behind that login dialog box, it is not click able. Once the application verifies user name and password, the screen(form) behind becomes click able. How can we implement this ?
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Hi,
- Set the Form.Enabled property to false.
- Create a new form and show it (for the username and password etc).
- When you create this new form add an event handler for when it closes (in the parent form).
- If the event handler method, set the Form.Enabled property to true.
Cheers,
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Thanku so much. There is one more thing i want to ask. How can i make that login (mini) form (which just contains username, password field + two buttons) detached from the taskbar. I mean it should not be present on the taskbar. It should be dependent on the previous form. For example, have a look at this screenshot http://cs.gift.edu.pk/~tamour/form.jpg
modified on Wednesday, April 23, 2008 3:49 PM
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Running on Windows Vista as a standard user? That's the UAC administrative password prompt, which runs on a secure desktop. That actually has a different wallpaper from your regular desktop, but to preserve the illusion Windows Vista makes a copy of the screen then dims it to use as the background. You might also see that password prompt, rather than the Confirm/Deny dialog, if your administrator has chosen that for administrative user elevations.
If your application actually requires administrative privileges to do what you're doing, then add a UAC manifest to set the requestedExecutionLevel to requireAdministrator. Windows will then prompt for administrative credentials to execute the program.
If instead you want to capture your own credentials, rather than Windows logon credentials, call CredUIPromptForCredentials. This won't do the 'secure desktop' thing. The only way I can see to do that is to call CredUIPromptForWindowsCredentials and use the CREDUIWIN_SECURE_PROMPT flag, but even that is called out as 'not supported' for Windows Vista. Must be new in Windows Server 2008.
An approach we've used before on Windows Mobile is to create a window that covers the entire screen and is topmost, but the user can still press Alt+Tab to switch away from it.
DoEvents: Generating unexpected recursion since 1991
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Hi i have an application that lists some screenshots into a form using a
listview with thumbnails.
I want to highlight (using a red rectangle or something) an area from the original screenshot,
but on the thumbnail.
Any idea how to do that?
(i need to somehow map coordonates from the original image to the thumbnail and then draw on it)
Thanks
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d35tiny wrote: i need to somehow map coordonates from the original image to the thumbnail
Somehow? Just guessing here but try using Math.
led mike
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Well - if you know the location on the original image, and the size of the thumbnail then I would suggest scaling it down by the same amount and putting it on the thumbnail at the same point (similarly scaled).
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Hi,
How to set form controls to form size.When i maximize the Form,the form controls also reduces the size,and when i minimize the form the from controls are also minimize..
please post reply.
murali krishna
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avvaru.murali wrote: and when i minimize the form the from controls are also minimize..
There is no such thing as controls minimizing.
led mike
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Hi murali,
I am not sure is this you want,but you may try it.In target method you can resize whatever you want.
this.SizeChanged += new EventHandler(target method);
Hope this help you 
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The simplest approach in .NET is to use the Dock and Anchor properties. If you want to create a toolbar, use the Dock property to place the toolbar at the top. Similarly a 'status bar' could be set to Dock at the bottom. That means that the control is attached to one side of the window, and its size in the other direction is the size of the window (i.e. if docked to the left, the horizontal size is maintained but the vertical size is the size of the window).
Controls within a window can also be Anchored to maintain a set distance from the edge of a window. The default is to anchor top and left, so that as the window is resized, the distances to the top of the window and to the left of the window are maintained. To have the control increase size to the right when the form is made larger horizontally (and shrink when the form shrinks), anchor to the right as well. Similarly you can anchor to the bottom.
To have a control which simply moves to the right and to the bottom, rather than resizing - for example, a button next to a single-line text box - anchor only to the right and bottom, turn left and top anchoring off.
For more complicated layouts, you can split your form up into Panels which can then be anchored, and you can anchor or dock your controls within the Panels. .NET 2.0 adds a FlowLayoutPanel and there is also a TableLayoutPanel for tabular layouts.
DoEvents: Generating unexpected recursion since 1991
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I have set the FormBorderStyle to None. But the problem I'm facing after setting it to none is that i cannot resize it. How can i make it resize able ?
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The bold text thing is really annoying.
If you don't have a resize control, you need to make one. Capture the mouse when the user clicks, track it and resize your form.
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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Follow the Windows conventions. A window with no border is not resizable. Set the FormBorderStyle to Sizable.
This also governs the availability of the Size option in the window menu (press Alt+Space, left-click the icon, or right-click the window title or taskbar button).
DoEvents: Generating unexpected recursion since 1991
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Hi,
I am dealing with an windows application in which there is a form on which I m using DataGridView to display data fetched from the database.
I also used multi threading to show updated data continuously. Everything is working fine but I am not able to retain the DataGridView's scroll bar positions on successive execution of threads. How can i solve this problem?
Gurudatta B. Shelke
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What's the point of asking questions if you're not going to listen to the answers. Here...[^]
This was asked and answered a week ago.
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Sorry sir.. thanx for reply me again for the same question.
I posted the same question again b'cuz I have missed answer given by u in the last week.
extreamly sorry. 
Gurudatta B. Shelke
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Thank you Sir,
As per the info given on the following link[^]
I have declared all variables and also written the SendMessage function declaration.
Now I am not getting how to use this function and where to call this function!
I request you to help. 
Gurudatta B. Shelke
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I've created media player using sound dll's of windows.
Its woking...But my doubts are..
1) How can i associate it to the mp3 and wave files in my system?
2) How can i make a selection sequence in program for the user to select or to use my program as his default player for mp3/wave?
And help me on the code to make a progressbar while its playing..
Thanks in advance
varun
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1 - in the registry
2 - by writing code to put it in the registry
varun.g wrote: And help me on the code to make a progressbar while its playing..
Not sure if you get a callback from the API, but if you know the length of the track, can't you fudge it ?
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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Thanx for your help
Let me explain one,two things.
Actualy i've created the progressbar according to the track's progress.
But i need another progressbar to show ;(digital equalizer,like that).
And i haven't got things about registry and how to coding that.
can you help me please...
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