How to find window reference from CGContextRef?

Question

Hi, I am a highly experienced Windows / Linux developer, but have very little OSX experience (other than using Qt), so sorry, but my question will probably sound rather silly to some of you
Ok, so my question is this: is there some way, using either C/C++ or Objective-C, that I can find a window reference (either HIWindowRef or NSView?) from a CGContextRef?
Since I'm probably asking the wrong question, let me explain slightly... I'm working on an NPAPI (Safari/Firefox) plugin using the Cocoa event model (https://wiki.mozilla.org/Mac:NPAPIEvent_Models#The_Cocoa_eventmodel). In that mode, the plugin only receives a CGContextRef to draw with. However, I'm trying to get Qt's Cocoa classes to draw some fairly complex widgets for me (that code is already built, and working beautifully in a standalone application), so I want to be able to associate a Qt widget with browser's window.
Of course, there may be other ways to convince Qt to do what I want (I'm working on that angle as well), but if I could indeed get some sort of window reference from the CGContextRef, then that would get me a long way there!
Any help / thoughts would be really appreciated!
pc.

Answer 1

Hi,
You can directly refer to the variable as shown below, instead of FindControl.
protected void Page_Load(object sender, EventArgs e)
hypTest.HRef = ''http://www.example.com/'';
When you have master page and page layouts, id will change to dynamic by adding extra as shown in the below example.
<a href="#" id="ctl00_MainContent_hypTest">
<img src="/Images/selbar/1.jpg" id="ctl00_MainContent_isel1" />
</a>
Alternate way is to add the ClientIDMode="Static", then you ID will not change.  Your solution will work 
<a id="hypTest" ClientIDMode="Static" runat="server" href="#">
<img src="/_layouts/15/images/picture.PNG" alt="" />
</a>
Please mark it as answered, if your problem resolved.