CDC *screendc = getdc(); providing error "a value of type "HDC" cannot be used to initialize an entity of type "CDC *"

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C++

Hi I'm having issue with a piece of code meant to scale an image.I found a peice of code to do this here Scaling CImage[^]. My problem is that the line CDC *screenDC = GetDC(); gives the error "a value of type "HDC" cannot be used to initialize an entity of type "CDC *". I'm not really sure how to fix it as my all accounts it should be working correctly and most of the other solutions offer this as an example.

Here is the code

int iNewWidth = 2048;
	int iNewHeight = 2048;

	CImage image;
	image.Load(_T("C:\\Image.jpg"));
	
	CDC *screenDC = GetDC(); //Section that gives error
	CDC *pMDC = new CDC;
	pMDC->CreateCompatibleDC(screenDC);

	CBitmap *pb = new CBitmap;
	pb->CreateCompatibleBitmap(screenDC, iNewWidth, iNewHeight);

	CBitmap *pob = pMDC->SelectObject(pb);
	image.StretchBlt(pMDC->m_hDC,0, 0, iNewWidth, iNewHeight, 0, 0, image.GetWidth(), image.GetHeight(), SRCCOPY);
	pMDC->SelectObject(pob);
	
	CImage new_image;
	new_image.Attach((HBITMAP)(*pb));
	new_image.Save(_T("c:\\NewImage.jpg"));
	new_image.Detach();
	ReleaseDC(screenDC);

Thanks

What I have tried:

Removing this line causes the image to be black after it has been scaled.