If have implanted more string function :
; FBT_RemoveString(String$,Find$)
; With this Function you can remove a String under a String, example : Print FBT_RemoveString("Current desktop depth"," desktop") ,Return "Current depth"
; FBT_ReplaceString(String$,Find$,Replace$)
; With this function you can replace a string under a string, example : Print FBT_ReplaceString("Current desktop depth","desktop","monitor"), return "Current monitor depth"
; FBT_CountString(String$,Find$)
; This function return how many (find$) string in a string example : Num=FBT_CountString("This test is a big test","test"), return 2
; FBT_RemoveString(String$,Find$)
; With this Function you can remove a String under a String, example : Print FBT_RemoveString("Current desktop depth"," desktop") ,Return "Current depth"
; FBT_ReplaceString(String$,Find$,Replace$)
; With this function you can replace a string under a string, example : Print FBT_ReplaceString("Current desktop depth","desktop","monitor"), return "Current monitor depth"
; FBT_CountString(String$,Find$)
; This function return how many (find$) string in a string example : Num=FBT_CountString("This test is a big test","test"), return 2