How to change the colour of the inner area of check box using MFC?

This is the code for STATIC control.
maybe can help you.

first you have to add OnCtlColor event to draw the controls.
then use setbkcolor function.

HBRUSH CApplication1Dlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
	HBRUSH hbr = CDialogEx::OnCtlColor(pDC, pWnd, nCtlColor);
	switch(nCtlColor){
	case(CTLCOLOR_STATIC):{
		pDC->SetBkColor(RGB(91,148,214));
		break;
	}
	}

	return hbr;
}