visual and PictFormat related question

[Alexei Babich]

> Just to be sure: You did pass the colormap to the XCreateWindow call?
> (Adding the colormap to the "attributes" parameter and setting the
> CWColorMap bit in "valuemask")
In the example yesterday - no, I suppose, I did wrong way.
Today I corrected the parameters of creation of the window, here is an example:
----
{
    Window win;
    Visual *argb_visual;
    Colormap cmap;
    XSetWindowAttributes setattr;

    {
	//search visual suitable for PictStandardARGB32
	//derived from xdpyinfo source
	XVisualInfo viproto;
	      			/* fill in for getting info */
	    XVisualInfo * vip;
	       			/* returned info */
	int nvi = 0;
	viproto.depth = 32;
	vip = XGetVisualInfo(display, VisualDepthMask, &viproto, &nvi);
	if (nvi < 1) {
	    exit(EXIT_FAILURE);
	}
	if (nvi) {
	    argb_visual = vip->visual;
	           		//visual for 32-planes
		XFree(vip);
	}
    }

    //Creating colormap before creating window
    cmap =
	XCreateColormap(display, DefaultRootWindow(display), argb_visual,
			AllocNone);

    //preparing XSetWindowAttributes structure
    bzero(&setattr, sizeof(setattr));
    setattr.colormap = cmap;

    // create window
    // at this step I get error: "X Error of failed request:  BadMatch (invalid parameter attributes)\      Major opcode of failed request:  1 (X_CreateWindow)"

    win =
	XCreateWindow(display, DefaultRootWindow(display), 20, 30, 20, 30,
		      0, 32, InputOutput, argb_visual, CWColormap,
		      &setattr);
}

----
I have a lot of documentation on the X Window System, but due to poor English I do not often capture the nuances and this results in silly mistakes, as in yesterday's example (a situation with the XSetWindowAttributes.colormap when creating the window).
	
I suppose it's an embarrassing trifle for respected gurus of the community, so maybe someone could tell me where a dialogue on such issues would be more appropriate?
Or, specifically for the this topic, someone could point to an example, doing what I want, in a similar situation?

Thank you.

-- 
Regards,
Alexei Babich, circuit engineer, OOO NPP "Rezonans", Chelyabinsk, Russia
http://www.rez.ru
Jabber ID: impatt at jabber.ru