how to get HDC from a CDC object in MFC

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
eugenengAsked:
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chensuCommented:
CDC dc;

...

HDC hdc = dc.GetSafeHdc();

or

HDC hdc = dc.m_hDC;

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eugenengAuthor Commented:
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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chensuCommented:
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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eugenengAuthor Commented:
thanks chensu

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