c - Default drawing for WM_PAINT in a memory DC

Question

I want to treat WM_PAINT message. But at first, I want to let system to do the default drawing, then I draw something else manually.

For example:

    case WM_PAINT:
        CallWindowProc(DefWndProcTabControl, hwnd, message, wParam, lParam);
        TabControlOnPaint(hwnd);
        return 0;

This works, but is not very good, since it flicks.

One possibility is to make the default drawing done in a memory DC. But I don't know how to do this if I use CallWindowProc(DefWndProcTabControl...).

Any suggestion for this?

Answer 1

如果您正在绘制的窗口支持它，请使用WM_PRINT或WM_PRINTCLIENT将默认绘制到内存 DC 中。

（尝试通过这种CallWindowProc方式不太可能奏效。）