Several functions in Visual Basci are split (), UBound (), LBound (), InStr (), Mid ().

visual| function 1.Split (a string expression that contains substrings and delimiters, [delimiter],[the number of substrings to be returned],[numeric value representing the comparison method to use when distinguishing substrings]), and [] is an optional part. This function returns a one-dimensional array with a zero subscript that contains the specified number of substrings.
Cases:
Dim xx As Variant
Xx=split ("Hello World", "") "divides hello World into Hello and world
text1.text= xx (0) ' Return hello
TEXT2.TEXT=XX (1) ' Return to World
2.Ubound (array name), which returns a Long data whose value is the maximum subscript available for the specified array dimension
Lbound (array name) that returns a Long data whose value is the smallest subscript available for the specified array dimension.
Cases:
Dim xx As Variant
Xx=split ("Hello World", "")
Text1.text=ubound (XX) ' return 1
Text2.text=lbound (XX) ' return 0
3.Instr ([Start,]string1, string2), which returns a Variant (Long) that specifies the position of the first occurrence of a string (string2) in another string (string1), if no return 0 is found. [Start,] is an optional parameter that represents the starting position of the search.
Cases:
Dim xx As String
xx= "Hello World"
Text1.text=instr (xx, "O") ' Return 5
Text2.text=instr (6,xx, "O") ' returns 8, starting with the 6th character
4.Mid (String, start[, length]), which returns a Variant (String) that contains the character of the specified length [, length] in a string, and start as the starting position. where [, length] is an optional parameter without specifying a length, then all characters after start are returned.
Cases:
Dim xx As Sting
xx= "Hello World"
Text1.text=mid (xx,1,5) ' Return hello
Text2.text=mid (xx,1) ' Return to Hello World