我如何从cdc获得cwnd？ [英] How can i get cwnd from a cdc ?

问题描述

以allah的名义



玩得开心



i使用visual c ++ 2012。



如何在ActiveX项目中从CDC获得CWnd？



谢谢



我的尝试：



我试过吼叫代码但不起作用。



void CLanxXCtrl :: OnDraw（

CDC * pdc，const CRect& rcBounds，const CRect& rcInvalid ）

{



HWND h = WindowFromDC（pdc-> m_hDC）;

CWnd * w = CWnd :: FromHandle（h）;





...

}



这个CWnd会起作用但Project中的ActiveX不可见，OnDraw功能在运行时不起作用。



我该怎么做？

in the name of allah

have a good time

i work with visual c++ 2012.

how can i get the "CWnd" from a "CDC" in an ActiveX project?

thanks

What I have tried:

i've tried bellow code but doesn't work.

void CLanxXCtrl::OnDraw(
CDC* pdc, const CRect& rcBounds, const CRect& rcInvalid)
{

HWND h=WindowFromDC(pdc->m_hDC);
CWnd *w=CWnd::FromHandle(h);


...
}

this CWnd will work but cause of the ActiveX in Project is not visible, the OnDraw function doesn't work in run time.

how can i do that?

推荐答案

你已经有了一个指向与CDC相关的MFC窗口对象的指针 - 它是这个指针你正在调用的函数。

You've already got a pointer to the MFC window object associated with the CDC - it's the this pointer for the function you're calling.

这篇关于我如何从cdc获得cwnd？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！