[Solved] How To Get a Graphics Object For Drawing Generally on the Screen?

[Zohar]

Hi

 

If you execute this:

Local   $hGraphics  =_GDIPlus_GraphicsCreateFromHWND($SomeWindowHandle)

You will get a Graphics object that will enable you to draw on that specific Window you passed to the function.

 

But what if you want to draw on the screen generally?

Let's say you have your desktop visible, and on it 3 windows open, not maximized,

and you want to draw on the screen some text,

and that text might cover both the desktop, +some of the open windows..

What graphics object should you then get?

And how do you get it?

 

Thank you

Edited August 13, 2014 by Zohar

[JohnOne]

I may be wrong but usually functions take 0 as param for desktop window, or maybe you get a handle to desktop window (Program Manager).

Worth a try.

[Zohar]

Hi JohnOne

Thank you for this idea.

Specficically, the function _GDIPlus_GraphicsCreateFromHWND() is defined like this:

_GDIPlus_GraphicsCreateFromHWND($hWnd)
 

So I cannot call it with 0 parameters.

 

Any other CreateGraphics() function that I might try?

[JohnOne]

Did it give you an error? Did you try with desktop handle?

[Zohar]

Did it give you an error?

Yes it doesn't pass compilation (Ctrl-F5)

 

Did you try with desktop handle?

When I try with the Desktop's handle, it doesn't draw on the desktop for some reason, at all.

[JohnOne]

How about getting graphic object from DC

$hDC = _WinAPI_GetWindowDC(0)
$hGraphics = _GDIPlus_GraphicsCreateFromHDC($hDC)

[Zohar]

Perfect!!!

Now it draws over everything open, not just the desktop but also open windows on it!

Thank you very much JohnOne

 

Edit:

BTW Is there a way I could successfully do it with _GDIPlus_GraphicsCreateFromHWND() too?

When I try _GDIPlus_GraphicsCreateFromHWND(0), it draws nothing.

Edited August 13, 2014 by Zohar

[JohnOne]

Ace.