The following code will allow you to add vertical lines to WAITBAR :
hWait = waitbar(0,'Progress'); %
hAxes = get(hWait,'Children'); %
xLimit = get(hAxes,'XLim'); %
yLimit = get(hAxes,'YLim'); %
xData = repmat(linspace(xLimit(1),xLimit(2),11),2,1); %
yData = repmat(yLimit(:),1,11); %
hLine = line(xData,yData,'Parent',hAxes,... %
'Color','k',... %
'HandleVisibility','off'); %
After executing the above code, and then execute waitbar(0.35,hWait);, you will see a figure similar to this:

. ( , , ) , . , WAITBAR , . , , MathWorks File Exchange, , , , - ya.;)