CBCGPMemDC::CBCGPMemDC	(	CDC &	dc,
		CWnd *	pWnd,
		BYTE	alpha = 0,
		double	dblScale = 1.0
	)

Constructs a CBCGPMemDC object.

Parameters

dc	A reference to screen DC.
pWnd	A pointer to the window.
alpha	The drawing alpha.
dblScale	The drawing scale.