'Me' is not valid within a Module
Hi,
I use the code below to call another class "ScreenCapture.vb".
But I got a lot of errors.
'Me' is not valid within a Module
Thanks for your help.
Code:
Module ModuleSC
Sub Main()
Dim SC As New ScreenShot.ScreenCapture
'grabs image of object handle (in this case, the form)
Dim MyWindow As Image = SC.CaptureWindow(Me.Handle)
'grabs image of entire desktop
Dim MyDesktop As Image = SC.CaptureScreen
'captures entire desktop straight to file
SC.CaptureScreenToFile("c:\desktop2.jpg", Imaging.ImageFormat.Jpeg)
'captures image of object handle (in this case, the form) straight to file
SC.CaptureWindowToFile(Me.Handle, "c:\window2.jpg", Imaging.ImageFormat.Jpeg)
'returns bitmap of region of desktop by passing in a rectangle
Dim MyBitMap As Bitmap = SC.CaptureDeskTopRectangle(New Rectangle(Me.Location.X, Me.Location.Y, _
Me.Width, Me.Height), Me.Width, Me.Height)
MyBitMap.Save("c:\desktopregion.jpg", Imaging.ImageFormat.Jpeg)
'above example gets rectangle of form that it is called in, you can get
'desktop by calling me.hide before the actual function call in order to
'get the desktop that is in the bounds of the form (handy when using a
'transparent Form or control in order to make a "viewfinder" for the capture...)
'You can pass in any rectangle you want, this was so you can see how
'it works...
End Sub
End Module
The other class is briefly listed as
Code:
Imports System
Imports System.Runtime.InteropServices
Imports System.Drawing
Imports System.Drawing.Imaging
Namespace ScreenShot
Public Class ScreenCapture
'/ Creates an Image object containing a screen shot of the entire desktop
Public Function CaptureScreen() As Image
Return CaptureWindow(User32.GetDesktopWindow())
End Function 'CaptureScreen
'/ Creates an Image object containing a screen shot of a specific window
Public Function CaptureWindow(ByVal handle As IntPtr) As Image
Dim SRCCOPY As Integer = &HCC0020
' get te hDC of the target window
Dim hdcSrc As IntPtr = User32.GetWindowDC(handle)
'......many lines then
Re: 'Me' is not valid within a Module
Quote:
Dim MyWindow As Image = SC.CaptureWindow(Me.Handle)
Modules does not have images. You need to provide the handle of a thing with an image, like a Form, or a PictureBox.
Re: 'Me' is not valid within a Module
I changed it as a form. Errors are "Declaration expected". I need help.
Thanks
Code:
Imports System.Windows.Forms
Public Class GC
Dim SC As New ScreenShot.ScreenCapture
'grabs image of object handle (in this case, the form)
Dim MyWindow As Image = SC.CaptureWindow(Me.Handle)
'grabs image of entire desktop
Dim MyDesktop As Image = SC.CaptureScreen
'captures entire desktop straight to file
SC.CaptureScreenToFile("c:\desktop2.jpg", Imaging.ImageFormat.Jpeg)'SC
'captures image of object handle (in this case, the form) straight to file
SC.CaptureWindowToFile(Me.Handle, "c:\window2.jpg", Imaging.ImageFormat.Jpeg)'SC
'returns bitmap of region of desktop by passing in a rectangle
Dim MyBitMap As Bitmap = SC.CaptureDeskTopRectangle(New Rectangle(Me.Location.X, Me.Location.Y, _
Me.Width, Me.Height), Me.Width, Me.Height)
MyBitMap.Save("c:\desktopregion.jpg", Imaging.ImageFormat.Jpeg)'MyBitMap
'above example gets rectangle of form that it is called in, you can get
'desktop by calling me.hide before the actual function call in order to
'get the desktop that is in the bounds of the form (handy when using a
'transparent Form or control in order to make a "viewfinder" for the capture...)
'You can pass in any rectangle you want, this was so you can see how
'it works...
End Class
Re: 'Me' is not valid within a Module
Re: 'Me' is not valid within a Module
¿Are you utilising the class on this page?
http://www.developerfusion.co.uk/show/4630/
it does not work;
those lines are broken:
Code:
Private Class GDI32
Public SRCCOPY As Integer = &HCC0020
' BitBlt dwRop parameter
Public Shared<DllImport("gdi32.dll")> _
Function BitBlt(hObject As IntPtr, nXDest As Integer, nYDest As Integer, nWidth As Integer, nHeight As Integer, hObjectSource As IntPtr, nXSrc As Integer, nYSrc As Integer, dwRop As Integer) As Boolean
Public Shared<DllImport("gdi32.dll")> _
Function CreateCompatibleBitmap(hDC As IntPtr, nWidth As Integer, nHeight As Integer) As IntPtr
Public Shared<DllImport("gdi32.dll")> _
Function CreateCompatibleDC(hDC As IntPtr) As IntPtr
Public Shared<DllImport("gdi32.dll")> _
Function DeleteDC(hDC As IntPtr) As Boolean
Public Shared<DllImport("gdi32.dll")> _
Function DeleteObject(hObject As IntPtr) As Boolean
Public Shared<DllImport("gdi32.dll")> _
Function SelectObject(hDC As IntPtr, hObject As IntPtr) As IntPtr
End Class 'GDI32
Re: 'Me' is not valid within a Module
I am using this one and get three errors.
Code:
Declaration expected
SC and MyBitMap
Please see my previous thread. Hopefully somebody would assist me.
http://www.vbforums.com/showthread.php?t=385497
Re: 'Me' is not valid within a Module
Follow the other link that I posted. If it works, you can go back and figure out whats wrong with your version. I have a version that uses this:
Disposes immediately.
Code:
Public Sub Capture()
_windowDCHandle = User32.GetWindowDC(_windowHandle)
Dim bitmapHandle As IntPtr = GetBitmapHandle()
_capturedImage = Image.FromHbitmap(bitmapHandle)
GDI32.DeleteObject(bitmapHandle)
End Sub
Code:
Private Function GetBitmapHandle() As IntPtr
Dim windowSize As Size = GetWindowSize()
With windowSize
Dim windowDCDestHandle As IntPtr = GDI32.CreateCompatibleDC(_windowDCHandle)
Dim bitmapHandle As IntPtr = GDI32.CreateCompatibleBitmap(_windowDCHandle, .Width, .Height)
Dim windowOldHandle As IntPtr = GDI32.SelectObject(windowDCDestHandle, bitmapHandle)
GDI32.BitBlt(windowDCDestHandle, 0, 0, .Width, .Height, _windowDCHandle, 0, 0, GDI32.SRCCOPY)
GDI32.SelectObject(windowDCDestHandle, windowOldHandle)
GDI32.DeleteDC(windowDCDestHandle)
Return bitmapHandle
End With
End Function
1 Attachment(s)
Re: 'Me' is not valid within a Module
Quote:
Originally Posted by zhshqzyc
Ok. It works now, with that class.
I had created a new application, copy-pasted your code on it, and it works OK. (no errors raised). See files attached.
By the way, you need to enclose your code into a Sub or Function:
Quote:
Originally Posted by zhshqzyc
I changed it as a form. Errors are "Declaration expected". I need help....
Code:
Imports System.Windows.Forms
Public Class GC
'Do not start running code here!
'This place is for global variables
Dim SC As New ScreenShot.ScreenCapture '<-- global variable in Class GC, not code run
'grabs image of object handle (in this case, the form)
Dim MyWindow As Image = SC.CaptureWindow(Me.Handle)
'grabs image of entire desktop
Dim MyDesktop As Image = SC.CaptureScreen
...
_
Re: 'Me' is not valid within a Module
Can you attach it again?
The downloaded file has a format efw. Can't be opened.
I put it into Main(). It does work but no files generated on C driver.
Code:
Imports System.Windows.Forms
Public Class Form1
Dim SC As New ScreenShot.ScreenCapture
'grabs image of object handle (in this case, the form)
Dim MyWindow As Image = SC.CaptureWindow(Me.handle)
'grabs image of entire desktop
Dim MyDesktop As Image = SC.CaptureScreen
Sub Main()
'captures entire desktop straight to file
SC.CaptureScreenToFile("c:\desktop2.jpg", Imaging.ImageFormat.Jpeg)
'captures image of object handle (in this case, the form) straight to file
SC.CaptureWindowToFile(Me.Handle, "c:\window2.jpg", Imaging.ImageFormat.Jpeg)
'returns bitmap of region of desktop by passing in a rectangle
Dim MyBitMap As Bitmap = SC.CaptureDeskTopRectangle(New Rectangle(Me.Location.X, Me.Location.Y, _
Me.Width, Me.Height), Me.Width, Me.Height)
MyBitMap.Save("c:\desktopregion.jpg", Imaging.ImageFormat.Jpeg)
'above example gets rectangle of form that it is called in, you can get
'desktop by calling me.hide before the actual function call in order to
'get the desktop that is in the bounds of the form (handy when using a
'transparent Form or control in order to make a "viewfinder" for the capture...)
'You can pass in any rectangle you want, this was so you can see how
'it works...
End Sub
End Class
Thank you so much.
Re: 'Me' is not valid within a Module
Quote:
Originally Posted by zhshqzyc
Can you attach it again?
The downloaded file has a format efw.
No .efw file. Is a VB.NET 2008 project file, compressed with winrar (download Winrar from here:http://www.rarlab.com/rar/wrar371.exe), you can also use GNU 7Zip.
To open it double click WindowsApplication1.vbproj file
Quote:
Originally Posted by zhshqzyc
...
I put it into Main(). It does work but no files generated on C driver.
Try:
Code:
Imports System.Windows.Forms
Public Class Form1
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim SC As New ScreenShot.ScreenCapture
'grabs image of object handle (in this case, the form)
Dim MyWindow As Image = SC.CaptureWindow(Me.handle)
'grabs image of entire desktop
Dim MyDesktop As Image = SC.CaptureScreen
'captures entire desktop straight to file
SC.CaptureScreenToFile("c:\desktop2.jpg", Imaging.ImageFormat.Jpeg)
'captures image of object handle (in this case, the form) straight to file
SC.CaptureWindowToFile(Me.Handle, "c:\window2.jpg", Imaging.ImageFormat.Jpeg)
'returns bitmap of region of desktop by passing in a rectangle
Dim MyBitMap As Bitmap = SC.CaptureDeskTopRectangle(New Rectangle(Me.Location.X, Me.Location.Y, _
Me.Width, Me.Height), Me.Width, Me.Height)
MyBitMap.Save("c:\desktopregion.jpg", Imaging.ImageFormat.Jpeg)
'above example gets rectangle of form that it is called in, you can get
'desktop by calling me.hide before the actual function call in order to
'get the desktop that is in the bounds of the form (handy when using a
'transparent Form or control in order to make a "viewfinder" for the capture...)
'You can pass in any rectangle you want, this was so you can see how
'it works...
End Sub
End Class
Re: 'Me' is not valid within a Module
To get back to the original problem :
'Me' is not valid within a Module
From MSDN, it says:
A keyword related to class instances, such as Me or MyBase, is used inside a module.
This means that Me cannot be used inside a module, because the Module is not a class. What you can do is to create a object of that class ( so, if you used this code in a class called Form1, you should create an object of Form1 ) :
Code:
Dim ExampleFormClass As New Form1
Then, instead of using the word Me, you could've used the word ExamplFormClass
Just in case anyone was interested :rolleyes:
