How to access UI controls from a user defined class (CFormView based SDI application)

 Answers from codeproject (cy163cy163)

GetActiveWindow() is thread-specific. You have no active windows in your worker thread.

Why not add a CHhhhView* member to your MyClass class (pass it in in the constructor):

class MyClass
{
	CHhhhView *pView;
public:
	MyClass(CHhhhView *view)  {pView = view;}
};

void CHhhhView::OnButton1() 
{
	// TODO: Add your control notification handler code here
	MyClass *objMyClass = new MyClass(this);
	AfxBeginThread(MyThreadProc, objMyClass);	
}

Now you can use pView in MyClass instead of ((CMDIFrameWnd*)AfxGetMainWnd()->GetActiveWindow()).

------------------------
Answer from codeguru (cy163)

---

The thread below answers your dilemma:
How to access UI elements from a thread in MFC?
http://www.codeguru.com/forum/showthread.php?t=312454
Jist is to pass the HWND of the window you need to update to the thread in some way and use the HWND ( and NOT CWnd object pointer )