GETPIXEL API

[Serdar C.]

ok i searched the internet for this api and i found the
usage of getpixel api like this:
getpixel(example.hdc,x,y)
but i cant find any property about this "hdc".. that does
that hdc 's equal in vb.net??? thanx for helping..

[Ken Tucker]

Hi,

The graphics object has a gethdc method. You must manually release
the hdc when you are done with it.

Private Sub Form1_Paint(ByVal sender As Object, ByVal e As
System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint

Dim g As Graphics = e.Graphics

Dim hdc As IntPtr = g.GetHdc

' Do something with the hdc

g.ReleaseHdc(hdc)

End Sub

Ken
------------------
"Serdar C." <se*****@interaktif.gen.tr> wrote in message
news:02****************************@phx.gbl...

ok i searched the internet for this api and i found the
usage of getpixel api like this:
getpixel(example.hdc,x,y)
but i cant find any property about this "hdc".. that does
that hdc 's equal in vb.net??? thanx for helping..

[Skevmeister]

I have never used the getpixelapi, but hdc normally means that it requires a
handle into the object that you are trying to manipulate.

Normall you would have to calls one to get the Windows Handle and return it
as a long and then pass that long through the call

"Serdar C." <se*****@interaktif.gen.tr> wrote in message
news:02****************************@phx.gbl...

ok i searched the internet for this api and i found the
usage of getpixel api like this:
getpixel(example.hdc,x,y)
but i cant find any property about this "hdc".. that does
that hdc 's equal in vb.net??? thanx for helping..

[Skevmeister]

OK, Back again.
http://www.partware.com/ebooks/api/ref/g/getpixel.html

Shows an example for this function, and an explanation of the hdc (Handle
for a Device Context)

Hope this helps.

Alixx

"Serdar C." <se*****@interaktif.gen.tr> wrote in message
news:02****************************@phx.gbl...

ok i searched the internet for this api and i found the
usage of getpixel api like this:
getpixel(example.hdc,x,y)
but i cant find any property about this "hdc".. that does
that hdc 's equal in vb.net??? thanx for helping..

[Herfried K. Wagner [MVP]]

Hello,

"Serdar C." <se*****@interaktif.gen.tr> schrieb:

ok i searched the internet for this api and i found the
usage of getpixel api like this:
getpixel(example.hdc,x,y)
but i cant find any property about this "hdc".. that does
that hdc 's equal in vb.net??? thanx for helping..

If you want a hDC to the form, use this code:

\\\
Dim g As Graphics = Me.CreateGraphics()
Dim hDC As IntPtr = g.GetHdc
..
..
..
g.ReleaseHdc(hDC)
g.Dispose()
///

HTH,
Herfried K. Wagner
--
MVP · VB Classic, VB .NET
http://www.mvps.org/dotnet

[Armin Zingler]

"Serdar C." <se*****@interaktif.gen.tr> schrieb

ok i searched the internet for this api and i found the
usage of getpixel api like this:
getpixel(example.hdc,x,y)
but i cant find any property about this "hdc".. that does
that hdc 's equal in vb.net??? thanx for helping..

Pass the return value of Graphics.GetHdc. You get a graphics object in sub
OnPaint/Paint event (e.graphics) or create a new one using
MyControl.CreateGraphics. (call it's dispose method after calling getpixel)
--
Armin

[Serdar C.]

Thanx So Much For Helping MY Program Is Working Now :)
ur #1!

[Cor]

Everybody did give an answer except the specialist the Über Geek