SysInfo.h (274): error: no type named 'mt19937' in namespace 'std'.

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used mods
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FileSel.h: adding
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Image GetDirIcon(const String& s);
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CtrlLib.h:
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#define NEWSTYLE
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TreeCtrl.cpp:1023
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            if(yh >= 0 && yl < sz.cy) {
				int x = levelcx + levelcx * l.level + levelcx2 - org.x;
#ifdef NEWSTYLE
#else
				w.DrawRect(x, yl, 1, yh - yl, SColorShadow);
#endif
			}
TreeCtrl.cpp:1051	
		if(w.IsPainting(0, y, sz.cx, msz.cy) && msz.cy > 0) {
			if (multiroot) {
				if(m.canopen || m.child.GetCount()) {
#ifdef NEWSTYLE
					Image im = m.isopen ? CtrlImg::SmallDown() : CtrlImg::SmallRight();
#else
					Image im = m.isopen ? CtrlImg::treeminus() : CtrlImg::treeplus();
#endif
					op -= CtrlImg::cross().GetSize() / 2;
					w.DrawImage(op.x, op.y, imgEmpty);
				}
			}
			else {
#ifdef NEWSTYLE
#else
				w.DrawRect(op.x, op.y, levelcx2, 1, SColorShadow);
#endif
				if(m.canopen || m.child.GetCount()) {
#ifdef NEWSTYLE
					Image im = m.isopen ? CtrlImg::SmallDown() : CtrlImg::SmallRight();
#else
					Image im = m.isopen ? CtrlImg::treeminus() : CtrlImg::treeplus();
#endif
					op -= im.GetSize() / 2;
					w.DrawImage(op.x, op.y, im);
				}
			}
			w.DrawImage(x, y + (msz.cy - isz.cy) / 2, m.image);
			x += isz.cx;
			Color fg, bg;
			dword st;
			Size csz = m.GetCtrlSize();
			if(m.ctrl && !highlight_ctrl) // 2008-04-08 mrjt
				x += csz.cx;
			if(x < sz.cx) {
				const Display *d = GetStyle(i, fg, bg, st);
				int ctx = highlight_ctrl * csz.cx;
				Rect br = RectC(x, y, vsz.cx + 2 * m.margin + ctx, msz.cy);
				if(!IsNull(m.value) || m.ctrl && highlight_ctrl) {
#ifdef NEWSTYLE
#else
					w.DrawRect(br, bg);
#endif
					Rect r = RectC(x + ctx + m.margin, y + (msz.cy - vsz.cy) / 2, vsz.cx, vsz.cy);
					w.Clip(r);
					d->Paint(w, r, m.value, fg, bg, st);
					w.End();
				}
				if(i == cursor && !nocursor && multiselect && GetSelectCount() != 1 && HasFocus()
				   && !IsDragAndDropTarget())
					DrawFocus(w, br, st & Display::SELECT ? SColorPaper() : SColorText());
			}
		}
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https://www.ultimatepp.org/www$uppweb$download$en-us.html

https://sourceforge.net/projects/upp/files/

https://sourceforge.net/projects/upp/files/latest/download

void FolderTree::AddSystemPlaces(int id)
{
	Array<FileSystemInfo::FileInfo> root;
	FileSystemInfo fs;
#ifdef PLATFORM_WIN32
	root = fs.Find("",1000,false);
	for(int i = 0; i < root.GetCount(); i++) {
		String desc = root[i].root_desc;
		String n = root[i].filename;
		if(n != "A:\\" && n != "B:\\") {
		#ifdef PLATFORM_WIN32
			if(*n.Last() == '\\')
				n.Trim(n.GetCount() - 1);
		#endif
		    String type;
		    int maxName;
			if(desc.GetCount() == 0) {
				GetDriveInformation(n, type, desc, maxName, type);
				if (desc == "") desc << " " << t_("Local Disk");
			}
			desc << " (" << n << ")";
			AddPlace(id, GetDriveImage(root[i].root_style), root[i].filename, desc);
		}
	}

	if(GetSystemMetrics(SM_REMOTESESSION))
		for(int drive = 'A'; drive < 'Z'; drive++) {
			String path = Format("\\\\tsclient\\%c", drive);
			if(FindFile(path + "\\*.*"))
				AddPlace(id, path, Format(t_("%c on client"), drive));
		}
#endif

#ifdef PLATFORM_POSIX
	root = fs.Find("/media/*",1000,false);
	for(int i = 0; i < root.GetCount(); i++) {
		String fn = root[i].filename;
		if(*fn != '.' && fn.Find("floppy") < 0)
			AddPlace(id, "/media/" + fn, fn);
	}
	AddPlace(id, "/", t_("Computer"));
#endif
}

		String desc = root[i].root_desc;
		String n = root[i].filename;