Using Shellexecute to start a program

Hello
How can i use ShellExecute command to start an application. Since the application as to be run in administrator mode, i suppose that i need to pass a Vbyes parameter to the comnmand line

The application is use for a text capture process
name is: Hypersnap6.exe
Directory: "c:\Program Files (x86)\Hypersnap 6\"

I did use before the shell() command, but it doesn't work anymore when the targeted application is under administrator mode

Any help appreciated

Martin