Fix treeview with checkboxes creation

[Dmitry Timoshkov]

"Maxime Bellengé" <maxime.bellenge at laposte.net> wrote:

> -       hdc = CreateCompatibleDC(0);
> -       hbm = CreateCompatibleBitmap(hdc, 48, 16);
>
> hbm is a 1 bit per pixel bitmap
>
> +       hdcScreen = CreateDCA("DISPLAY", NULL, NULL, NULL);
> +
> +       hdc = CreateCompatibleDC(hdcScreen);
> +       hbm = CreateCompatibleBitmap(hdcScreen, 48, 16);
>
> hbm has now a screen compliant depth

You are right. Probably it's better to just replace CreateCompatibleBitmap()
by CreateBitmap() with the desired number of bits per pixel. In any case
send what you see more appropriate.

--
Dmitry.