Solved

Capture Active window in vb.net

Posted on 2007-03-31
4
579 Views
Last Modified: 2013-11-07
Does anyone have or has seen an example of how to find the current active window on a desktop, find its cordinates and then screen shot it in to a bmp?
0
Comment
Question by:pamsauto
  • 3
4 Comments
 
LVL 85

Expert Comment

by:Mike Tomlinson
ID: 18829580
There are two basic ways to go about it:

(1) Use the GetForegroundWindow() API to get a handle to the active window.  Use the GetWindowRect() API to get the screen coordinates.  Use the BitBlt() API to copy it to an image (more APIs involved there).

(2) Press Alt-PrtScr and copy the resulting Image from the ClipBoard.

Do you have a preference in method?...
0
 
LVL 85

Accepted Solution

by:
Mike Tomlinson earned 500 total points
ID: 18829603
Method (2) is simply...

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Clipboard.Clear()
        SendKeys.SendWait("%{PRTSC}")
        Dim data As IDataObject = Clipboard.GetDataObject()
        If data.GetDataPresent(GetType(System.Drawing.Bitmap)) Then
            Dim bmp As Bitmap = CType(data.GetData(GetType(System.Drawing.Bitmap)), Bitmap)

            ' do something with "bmp"...
            PictureBox1.Image = bmp
        End If
    End Sub
0
 

Author Comment

by:pamsauto
ID: 18829831
I need method #1.  With the API calls you gave me I found what I needed.  They were solutions you made for users already!    

http://www.experts-exchange.com/Programming/Languages/.NET/Visual_Basic.NET/Q_21504191.html


As always Idle Mind - Thanks for your help.
0
 
LVL 85

Expert Comment

by:Mike Tomlinson
ID: 18830192
=)
0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Many of us here at EE write code. Many of us write exceptional code; just as many of us write exception-prone code. As we all should know, exceptions are a mechanism for handling errors which are typically out of our control. From database errors, t…
More often than not, we developers are confronted with a need: a need to make some kind of magic happen via code. Whether it is for a client, for the boss, or for our own personal projects, the need must be satisfied. Most of the time, the Framework…
This Micro Tutorial hows how you can integrate  Mac OSX to a Windows Active Directory Domain. Apple has made it easy to allow users to bind their macs to a windows domain with relative ease. The following video show how to bind OSX Mavericks to …
Many functions in Excel can make decisions. The most simple of these is the IF function: it returns a value depending on whether a condition you describe is true or false. Once you get the hang of using the IF function, you will find it easier to us…

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now