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how to get HDC from a CDC object in MFC

Posted on 1998-02-25
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Last Modified: 2013-11-20
how can I get the HDC from a CDC object. I know it is storing in
m_hDC, but how to get the HDC. help please. Thanks
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Question by:eugeneng
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4 Comments
 
LVL 23

Accepted Solution

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chensu earned 10 total points
ID: 1316526
CDC dc;

...

HDC hdc = dc.GetSafeHdc();

or

HDC hdc = dc.m_hDC;

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Author Comment

by:eugeneng
ID: 1316527
right i'm calling an outside library function that require HDC as a parameter. i think the code you gave me is correct, but when i call the function with hdc be the parameter, after complied, it give me unresolve external symbol. the outside function i called want a traditional window HDC but i gave MFC hdc, are they compatible.
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LVL 23

Expert Comment

by:chensu
ID: 1316528
The unresolve external symbol has nothing to do with HDC. There must be other problems. HDC is a handle of device context. Only given an HDC, you cannot tell whether it is from MFC or not.
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Author Comment

by:eugeneng
ID: 1316529
thanks chensu

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