Yes, Now I know how to do this
1. Make a bmp objekt with "capture Screen" and save in Stores / Regions.
2. define a windows variable ( var Applicationwindow;)
3. Find out the windows name with "Display Object Spy"
4. Applicationwindow = windows name which you found out with "Display Object Spy"
Result = Regions.FindRegion("bmp objekt from point 1", Applicationwindow);
5. Calculate x and y value
var halfx = Result ["Width"]/2;
halfx = Math["round"](halfx);
var X = Result ["Left"]+ halfx;
var halfy = Result ["Height"]/2;
halfy = Math["round"](halfy);
var Y = Result ["Bottom"]- halfy;
ApplicationWindow ["DblClick"](X,Y);