[TUTORIAL]VB.NET Screen Capture [TUTORIAL]

[Konides]

Hello this is a VB.NET tutorial (beginners) on how to make o program caprure screen!

Here we go:
Add this under 'Public Class Form1

 Spoiler

Inherits System.Windows.Forms.Form

Private Declare Function CreateDC Lib "gdi32" Alias "CreateDCA" (ByVal lpDriverName As String, ByVal lpDeviceName As String, ByVal lpOutput As String, ByVal lpInitData As String) As Integer

Private Declare Function CreateCompatibleDC Lib "GDI32" (ByVal hDC As Integer) As Integer

Private Declare Function CreateCompatibleBitmap Lib "GDI32" (ByVal hDC As Integer, ByVal nWidth As Integer, ByVal nHeight As Integer) As Integer

Private Declare Function GetDeviceCaps Lib "gdi32" Alias "GetDeviceCaps" (ByVal hdc As Integer, ByVal nIndex As Integer) As Integer

Private Declare Function SelectObject Lib "GDI32" (ByVal hDC As Integer, ByVal hObject As Integer) As Integer

Private Declare Function BitBlt Lib "GDI32" (ByVal srchDC As Integer, ByVal srcX As Integer, ByVal srcY As Integer, ByVal srcW As Integer, ByVal srcH As Integer, ByVal desthDC As Integer, ByVal destX As Integer, ByVal destY As Integer, ByVal op As Integer) As Integer

Private Declare Function DeleteDC Lib "GDI32" (ByVal hDC As Integer) As Integer

Private Declare Function DeleteObject Lib "GDI32" (ByVal hObj As Integer) As Integer

Const SRCCOPY As Integer = &HCC0020

Private oBackground As Bitmap
Private FW, FH As Integer

Now add this sub anywhere to your project, just make sure it's not in another sub.

 Spoiler

Protected Sub CaptureScreen()

Dim hSDC, hMDC As Integer
Dim hBMP, hBMPOld As Integer
Dim r As Integer

hSDC = CreateDC("DISPLAY", "", "", "")
hMDC = CreateCompatibleDC(hSDC)

FW = GetDeviceCaps(hSDC, 8)
FH = GetDeviceCaps(hSDC, 10)
hBMP = CreateCompatibleBitmap(hSDC, FW, FH)

hBMPOld = SelectObject(hMDC, hBMP)
r = BitBlt(hMDC, 0, 0, FW, FH, hSDC, 0, 0, 13369376)
hBMP = SelectObject(hMDC, hBMPOld)

r = DeleteDC(hSDC)
r = DeleteDC(hMDC)

oBackground = Image.FromHbitmap(New IntPtr(hBMP))
DeleteObject(hBMP)

End Sub

And if you want Button1 to capture the screen and save it to C:/picture.jpg you would do this:

 Spoiler

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
CaptureScreen()
oBackground.save("C:/picture.jpg")
End Sub

Hope it works.I will make many more tutorial on how to learn visual basic!leave a feedback if you have problems!
CREDITS GOES TO ME AND BOOMER!

POST THANKS IF I HELPED

[. χaωe]

This is not a Tutorial, looks very like an HowTo. You dont describe your code snippets. Thats just Copy and Paste...

[Konides]

so what?? if i tell what the code is you wont understand so take the code this way..

[. χaωe]

I understand this code. I dont need you to explain this, but other ones wishes an explanation, maybe...

[slytherin90]

... such pity... i only coded this thing with just 6 - 11 lines of codes...

[voodoofox]

Thank you very much. It works well on my pc. What I really need is the picture of the VB form I am working on. Could you tell me how to do it, or could you offer a code? Thank you in advance.