Gdi - Trasparent Control - Import A Png With Alpha Channel And Random Shape
Mar 25, 2010
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i have created a control as above, this control allows me to import a png with alpha channel and random shape. and then it can display on top of any other control, i.e. textbox, picturebox,etc. and the background should always show what right under it, instead of just show its parent control. it worked if it's static mode, ie stand still in the form. but when i tried to drag/move it, the control wouldn't render itself properly,and also goes underneath other controls.
url...But what I'm looking for is just see if any alpha (0-254) is used in at least one of the pixels. Would the Bitmap.Lockbits and BitmapData method be the most efficient (speedy?) or is there another way. I've tried toying around with ColorPalette and the Alpha flag, but never could figure it out (and even if it is a way to check to see if the alpha channel is used at all).
I am developing a COM Add-in using VB.NET in Visual Studio 2008 Pro for Outlook 2003 and am having trouble assigning images to custom toolbar buttons. In a nutshell, I am having to convert from an Icon type to a stdole.IPictureDisp type so that I can assign my buttons a picture. The picture displays, but it loses the Alpha channel and the background is no longer transparent. I can verify that before the conversion to IPictureDisp object, that the PixelFormat property is set to Format32bppArgb (2498570). I am using a coding technique suggested here:[URL]. For C# users, this link [URL] shows how to modify the IPictureDisp one pixel at a time and rebuild the transparency, but I can't find similar functions in VB.NET...
i want to write text on trasparent scrollable control.I try to use label (that accepts trasparent backcolor), but it doesn't have scrollbarIf i use textbox, it has a scrollbar , but not trasparen backcolor.So what control can i use? There something to do this?
I nedd some help in generating a random alph-numeric password for a form that I building. The form should suggest a password that 18 characters long. The user would either agree to this password or enter their own password.[code]When I use this I get a two digit number.
Test 1: this test shows random colours in 8 boxes which appear in a circle shape. All boxes randomly change colour every .20 sec, and no two boxes display the same colour. At the same time a box in the centre changes colour to match one of the outside boxes. The participant must match in this box�s colour by clicking on the correct outside box colour. The score is then increased by 1 point for each correct answer. Each test lasts 1 min.
Test 2: the second test is the same as test 1 but instead of displaying a box filled with a colour in the centre, the word �green�, for example, appears in the green font colour. The word has �wide� letters so that there is plenty of colour showing. All other aspects are the same.
Test 3: the final tests uses random word colours but a different word. The candidate is required to match the Word and not the colour. Eg the word �GREEN� appears but the font colour is RED.The candidate must click on the colour GREEN to score a point.
I have an I/O device with 8 channels. I want to create a timer control for each channel with combo boxes for days, hours, minutes and radiobuttons for AM or PM. This is a crude (and not working) example of what I need:[code]
I want to make my vb.net windows application titlebar trasparent as like vista's windows titlebar. if i code me.opacity than it will make whole form trasparant but i want to make only titlebar transparent.
i want to add a rectangle or circular shape control in datagridview cell & i have to change its fill color after some specific time (Like blinking led).
If you are using VB.Net 2005 or earlier. It was asked if a control can be made star shaped in this thread. [URL]. Then I have updated my Shape extension method to include a optional third parameter. The 3d parameter is indent percentage or indentPercent. The default is zero so there is no indent. If you indent by say 50% you will get a star shape.
The various ways you can call this extension method are; 'Please note: myControl may be any kind of control 'such as a Button, a PictureBox or whatever.>> Dim myControl As Control = New PictureBox() 'Defaults to 6 sides with no rotation angle.>> myControl.Shape() [Code] .....
In addition to the shapes you can create with the code from this thread. [URL]. Here is code to make a control or a Form into a vertical cross shape. This will show you how you can do it in Vb.Net 2008 and 2010 using extension methods. The following post will show how you could do it differently in Vb.Net in other versions as well as Vb.Net 2008 and 2010.
1) From the PROJECT menu select ADD MODULE.
2) In the NAME box type CrossShapedThings.Vb and then click on OK.
3) PASTE this code in.>> Option Strict On Imports System.Runtime.CompilerServices Module CrossShapedThings <Extension()> _ Public Sub MakeCrossShaped(ByVal aControl As Control, Optional ByVal CrossWidth As Integer = 10) [Code] ........
I have got a couple of VB Powerpack Ovalshapes on my Form.I use these for a quick indication if the networked device is online or offline.I can't seem to control the Visible function (or any other function for that matter) one my Background Worker is running.For my Textboxes I used a guide by jmcilhinney which worked great for them but there is no 'Invoke' property for graphics controls.
I am architecting a program that I need some help on. I need to have a "watcher" program that will sit on a server and monitor a SQL Server. At configured intervals, the watcher will run a query on the server and create a dataset of information I want to share to any clients that are listening. I am looking at WCF Peer channel but all I can see is peer to peer chat and most of the examples I have seen are partial examples. I have looked at the example program from Microsoft but I am still a bit confused. The listener programs will receive the dataset of values from the watcher and filter the data at the local level and display the data they need and display it to the end user. I don't know if a TCP client/server would be a better solution, but the dataset may contain up to 10,000 rows of data. From what I read the WCF Peer channel will transmit at 50 mbps and should handle this load. My other option is a server/client architecture using TCP spawning a new thread for each request. Does anyone have any good examples, or articles about WCF and VB that they can point me to?
I am using VB2005 express and VC#2005 express. With my old friend VS2003, whenever i needed to add flash to my WInforms, all i needed to do was to add the control as a com component and drag it on the stage from the toolbar. Now, when i did the same in new express version, althogh it is added in the toolbars and the references list, but still, whenever i try to drag a shockwave flash instance on my win form, i get the error: Failed to import ActiveX control, please ensure it is properly registered.
does some one have any idea how to add flash comntrol as we used to do in earlier versions?
I've got a micro controller with 4 channel ADC that I want to make a program for. It will be for data logging. I want to take each channel and display it in 4 textboxes to begin with.Later I like to do some conversions of the data to show temperature , use a lookup table and a few other things in each of these boxes, but at first I'd just like to concentrate on getting the data split into each box.The chip output is 8 bytes . The first two are the channel select and the next two is the data. Output of the chip is in ASCII. I don't want to send to the chip, just receive.If I view the output in decimal I get 1xx 2xx 3xx 4xx (xx being the data to display).
Client(winforms MDI) is generated using svcutil using /l, /r, /ct, & /n switches
Service and client both use a MyEntities.dll
I am using nettcp with TransportWithMessageCredential. I cache the proxy in the main form
if Membership.ValidateUser(UsernameTextBox.Text, PasswordTextBox.Text) _proxy = new MyServiceClient _proxy.ClientCredentials.UserName.UserName = "username"[code].....
Could I subscribe to the _proxy.InnerChannel.Faulted and do that clean up there?
Our core server is calling out to a soap web service over https on a number of different servers to confirm that a transaction has completed.The code is dotnet 3.5 (vb) and works for the various callback services we have set up until we just moved a new one into production and it is refusing to communicate, giving the following error:Unhandled Exception: System.ServiceModel.Security.SecurityNegotiationException:Could not establish secure channel for SSL/TLS with authority -> System.Net.WebException: The request washe case here.
I am new to ssl. I am trying to Post some data to OWA using httpwebrequest class using following code. Dim post As Stream post = web1.GetRequestStream post.Write(data, 0, data.Length) post.Close() But when I try to get request stream to submit data using above code.(JUST PART OF CODE).i get following error. The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.
i am trying to Post some data to OWA using httpwebrequest class.
Dim post As Stream post = web1.GetRequestStream post.Write(data, 0, data.Length) post.Close()
but when i try to get request stream to submit data using above code.(JUST PART OF CODE).i get following error.The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.
I would like to create a visualizer for the windows system audio. I'm looking for a way to sample the loudness of the sound currently being played. I don't need the actual sound unless required for computing the sound levels. My goal is to create something similar to the bouncing green level found on windows 7's volume control.
I am attempting to send a string to a textbox in the webbrowser control and the page I am trying to do this with has random name= and value= fields which makes it difficult to use the typical methods for placing text in the textbox. I have spent quite a bit of time searching and attempting to figure this out and I'm stumped.
i am having sum textboxes and combos which have been populated accordingly. as in the attchment i enter the data in the textboxes/select values 4m combo and when click on save button all the related text is added to the datagridview's respective col. as desired. the problem is now that if suppose a user enters a wrong data and wants to edit/update the record already added the he will select the desired record from datagrid, double click and all the related data appears again on the combos and textboxes. the user then edits and click on save so that the selected record gets updated
