GETPIXEL API

[Serdar C.]

ok i searched the internet for this api and i found the
usage of getpixel api like this:
getpixel(exampl e.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]

Re: GETPIXEL API

Hi,

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

Private Sub Form1_Paint(ByV al sender As Object, ByVal e As
System.Windows. Forms.PaintEven tArgs) Handles MyBase.Paint

Dim g As Graphics = e.Graphics

Dim hdc As IntPtr = g.GetHdc

' Do something with the hdc

g.ReleaseHdc(hd c)

End Sub

Ken
------------------
"Serdar C." <serdarc@intera ktif.gen.tr> wrote in message
news:023d01c36c 6a$267b64e0$a00 1280a@phx.gbl.. .[color=blue]
> ok i searched the internet for this api and i found the
> usage of getpixel api like this:
> getpixel(exampl e.hdc,x,y)
> but i cant find any property about this "hdc".. that does
> that hdc 's equal in vb.net??? thanx for helping..[/color]

[Skevmeister]

Re: GETPIXEL API

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." <serdarc@intera ktif.gen.tr> wrote in message
news:023d01c36c 6a$267b64e0$a00 1280a@phx.gbl.. .[color=blue]
> ok i searched the internet for this api and i found the
> usage of getpixel api like this:
> getpixel(exampl e.hdc,x,y)
> but i cant find any property about this "hdc".. that does
> that hdc 's equal in vb.net??? thanx for helping..[/color]

[Skevmeister]

Re: GETPIXEL API

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." <serdarc@intera ktif.gen.tr> wrote in message
news:023d01c36c 6a$267b64e0$a00 1280a@phx.gbl.. .[color=blue]
> ok i searched the internet for this api and i found the
> usage of getpixel api like this:
> getpixel(exampl e.hdc,x,y)
> but i cant find any property about this "hdc".. that does
> that hdc 's equal in vb.net??? thanx for helping..[/color]

[Herfried K. Wagner [MVP]]

Re: GETPIXEL API

Hello,

"Serdar C." <serdarc@intera ktif.gen.tr> schrieb:[color=blue]
> ok i searched the internet for this api and i found the
> usage of getpixel api like this:
> getpixel(exampl e.hdc,x,y)
> but i cant find any property about this "hdc".. that does
> that hdc 's equal in vb.net??? thanx for helping..[/color]

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

\\\
Dim g As Graphics = Me.CreateGraphi cs()
Dim hDC As IntPtr = g.GetHdc
..
..
..
g.ReleaseHdc(hD C)
g.Dispose()
///

HTH,
Herfried K. Wagner
--
MVP · VB Classic, VB .NET

http://www.mvps.org/dotnet

[Armin Zingler]

Re: GETPIXEL API

"Serdar C." <serdarc@intera ktif.gen.tr> schrieb[color=blue]
> ok i searched the internet for this api and i found the
> usage of getpixel api like this:
> getpixel(exampl e.hdc,x,y)
> but i cant find any property about this "hdc".. that does
> that hdc 's equal in vb.net??? thanx for helping..[/color]

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.Creat eGraphics. (call it's dispose method after calling getpixel)


--
Armin

[Serdar C.]

GETPIXEL API

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

[Cor]

Re: GETPIXEL API (not an answer is already given, just a try for a joke)

Everybody did give an answer except the specialist the Über Geek