MFC change background color of window/dialog

1. Add events

Open the properties of the window class that you want to change the background color and add the WM_CTLCOLOR message

2. Add code

Add lines 6-13 to the newly created OnCtlColor function as shown below

HBRUSH 窗口类名::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
    
    
	HBRUSH hbr = 基类名::OnCtlColor(pDC, pWnd, nCtlColor);

	// TODO:  在此更改 DC 的任何特性
	switch (nCtlColor)
	{
    
    
	case CTLCOLOR_DLG:
		HBRUSH aBrush;
		aBrush = CreateSolidBrush(RGB(255, 255, 255));
		hbr = aBrush;
		break;
	}

	// TODO:  如果默认的不是所需画笔，则返回另一个画笔
	return hbr;
}